OPINION
In this case, we consider whether a district court may summarily enforce a settlement agreement that produced the dismissal of an earlier federal suit when the court has diversity jurisdiction over the breach-of-settlement-agreement controversy. We conclude that it may, and we therefore affirm the district court’s judgment.
I
In 2001, James and Henry Limbright sued George and Kay Hofmeister in the United States District Court for the Eastern District of Kentucky for breach of various agreements made in connection with the Hofmeisters’ purchase of the Limbrights’ Michigan-based business. The Limbrights won a judgment against the Hofmeisters for $1.2 million, which they registered in the Eastern District of Michigan in June 2004. In December 2004, the Limbrights filed a new suit against the Hofmeisters and their three irrevocable family trusts (the “Trusts”) in the United States District Court for the Eastern District of Michigan. This suit sought to reach the Trusts’ assets to satisfy the earlier judgment, alleging that the Hofmeisters had fraudulently conveyed assets to the Trusts and that the Trusts were alter egos of the Hofmeisters.
On January 9, 2007, the parties reached a settlement agreement (the “Agreement”). The Trusts agreed to purchase the Limbrights’ judgment and all of their claims against the Hofmeisters and the Trusts in exchange for $950,000, to be paid in five installments over approximately one year. If the Trusts defaulted, the Agreement provided that, upon an ex parte motion by the Limbrights and without notice to the Trusts, the district court would enter a consent judgment against the Trusts for $1.3 million, less the amount of any payments made prior to default. Additionally, the Agreement contained strict confidentiality provisions that prohibited even the district court from seeing it.
The same day, the parties notified the district court of the Agreement by fax. The district court immediately entered an order dismissing the case with prejudice but allowing the case to be reopened to enforce the Agreement on or before May 9, 2007. This order did not conform to the Agreement’s enforcement scheme, so the parties asked the district court to vacate the order and enter a new, stipulated, one that matched the Agreement’s terms.
The district court, still without having seen the Agreement, granted the parties’ *674 request on February 1, 2007. The new order stated:
It is hereby ordered that the complaint is dismissed without prejudice and without costs to any party.
It is further ordered that this Order of Dismissal is expressly subject to all terms and conditions of the settlement agreement executed by the parties on January 9, 2007.
It is further ordered that this Court will not retain jurisdiction over this matter.
Although the parties’ proposed order did not contain the last clause, neither party brought this discrepancy to the attention of the court.
In December 2007, the Trusts failed to make the final balloon payment of $650,000. In accordance with the Agreement, the Limbrights filed an ex parte motion to reinstate the dismissed suit and enter a consent judgment against the Trusts for $1 million ($1.3 million minus the $300,000 already paid).
The district court granted the Limbrights’ motion, noting that, because the Trusts did not dispute that they breached the Agreement, the only issue was whether the court had subject matter jurisdiction to enforce the Agreement without a new case filing. The district court concluded that it had diversity and ancillary jurisdiction, as well as continuing jurisdiction based on the dismissed suit. The Trusts appeal, contesting only the court’s subject matter jurisdiction. Our review is de novo.
See McAlpin v. Lexington 76 Auto Truck Stop, Inc.,
II
In
Kokkonen v. Guardian Life Insurance Co. of America,
the Supreme Court held that, in enforcing a settlement agreement that produced the dismissal of an earlier federal suit, a federal court adjudicates a breach-of-contract controversy distinct from the dismissed suit.
The district court below relied, in part, on diversity jurisdiction. There is no question that diversity exists, and the Trusts concede that the district court could have enforced the Agreement had the Limbrights filed a new breach-of-contract suit. See 28 U.S.C. § 1332. However, the Trusts argue that the district court could not use diversity jurisdiction to summarily enforce the Agreement; Kokkonen, they contend, allows summary enforcement only when ancillary jurisdiction exists.
Whether a district court must have ancillary jurisdiction to summarily enforce a settlement agreement is a question of first impression in this circuit. At least two circuits have explicitly addressed this issue since
Kokkonen,
and both held that a district court may rely on a non-ancillary source of jurisdiction.
See Blue Cross & Blue Shield Ass’n v. Am. Express Co.,
In challenging the district court’s jurisdiction, the Trusts misunderstand the nature of subject matter jurisdiction. Subject matter jurisdiction is a federal court’s “power to adjudicate a case.”
United States v. Martin,
We disagree. This court has long approved summary enforcement of settlement agreements “in order to promote the ... speedy and reasonable resolution to disputes,”
2
Bobonik v. Medina Gen. Hosp.,
Nonetheless, the Trusts maintain that precedent dictates a distinction, arguing that, by focusing on ancillary jurisdiction and failing to analyze diversity explicitly,
Kokkonen
and this court’s case law implicitly preclude summary enforcement based on diversity.
2
3
Aside from the lack of any rationale for this distinction, the Trusts’ reading of the case law is flawed.
Kokkonen
stated that, “[ajbsent [ancillary jurisdiction], ... enforcement of the settlement agreement is for state courts,
unless there is some independent basis for federal jurisdiction.”
*676
This is unpersuasive.
Kokkonen,
despite reviewing a motion for summary enforcement, never distinguished between summary enforcement and new-suit enforcement; the decision discusses only “enforcement.” Moreover, immediately prior to this statement,
Kokkonen
concluded that there was no federal question jurisdiction over the summary enforcement action, an inquiry that is unnecessary under the Trusts’ reading.
See id.
at 381,
The Trusts similarly misunderstand this court’s precedent. They rely on
McAlpin’s
statement that, without ancillary jurisdiction, “[t]he defendants’ proper remedy for these violations lies in a separate action for breach of the Settlement Agreement,”
Therefore, we conclude that Kokkonen and this court’s case law allow an “independent basis for federal jurisdiction,” such as diversity or federal question jurisdiction, to support summary enforcement.
Ill
Because the district court properly relied on diversity jurisdiction to summarily enforce the Agreement, we express no opinion on other potential sources of jurisdiction. The district court’s judgment is AFFIRMED.
Notes
. Of course, the existence of subject matter jurisdiction can be conditioned on compliance with procedural rules. See, e.g., 8 U.S.C. § 1252(d)(1) (conditioning federal court jurisdiction over immigration claims on an alien's exhaustion of administrative remedies). However, the existence of diversity jurisdiction is not so conditioned. See 28 U.S.C. § 1332 ("The district court shall have original jurisdiction of all civil actions where the matter in controversy exceeds the sum or value of $75,000, exclusive of interests and costs, and is between [diverse parties].”).
. In particular, summary enforcement ensures that the judge enforcing the settlement agreement is familiar with the parties and the underlying suit, and it avoids the delays inherent in having a newly filed case adjudicated.
. The Trusts also cite several district court cases that have held that diversity jurisdiction cannot support summary enforcement. None of these cases offer a substantive justification for this holding, and we decline to accord them any persuasive value.
See, e.g., Geiringer v. Pepco Energy Servs., Inc.,
No. CV054172,
