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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2026
Fair Value Disclosures [Abstract] |
Assets and Liabilities Measured at Fair Value on Recurring Basis | The Company’s assets and liabilities measured at fair value on a recurring basis at June 30, 2026 and December 31, 2025, were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement at June 30, 2026 Using
​ | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Quoted Prices in | ​ ​ ​ | Significant | ​ ​ ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Active Markets | ​ | Other | ​ | Significant
​ | ​ | ​ | ​ | ​ | for Identical | ​ | Observable | ​ | Unobservable
​ | ​ | ​ | ​ | ​ | Assets | ​ | Inputs | ​ | Inputs
​ | ​ | Total | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3)
Interest rate swap derivative instruments – net asset position | ​ | $ | 2,425 | ​ | $ | — | ​ | $ | 2,425 | ​ | $ | —
Restricted cash | ​ | $ | 163,398 | ​ | $ | 163,398 | ​ | $ | — | ​ | $ | —
Restricted investments | ​ | $ | 72,205 | ​ | $ | — | ​ | $ | 72,205 | ​ | $ | —
Contingent consideration | ​ | $ | (81,063) | ​ | $ | — | ​ | $ | — | ​ | $ | (81,063)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement at December 31, 2025 Using
​ | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Quoted Prices in | ​ ​ ​ | Significant | ​ ​ ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Active Markets | ​ | Other | ​ | Significant
​ | ​ | ​ | ​ | ​ | for Identical | ​ | Observable | ​ | Unobservable
​ | ​ | ​ | ​ | ​ | Assets | ​ | Inputs | ​ | Inputs
​ | ​ | Total | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3)
Interest rate swap derivative instruments – net asset position | ​ | $ | 1,718 | ​ | $ | — | ​ | $ | 1,718 | ​ | $ | —
Restricted cash | ​ | $ | 183,612 | ​ | $ | 183,612 | ​ | $ | — | ​ | $ | —
Restricted investments | ​ | $ | 80,533 | ​ | $ | — | ​ | $ | 80,533 | ​ | $ | —
Contingent consideration | ​ | $ | (84,696) | ​ | $ | — | ​ | $ | — | ​ | $ | (84,696)
Fair Value for Level 3 Liabilities | The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the six months ended June 30, 2026 and 2025: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Six Months Ended June 30,
​ | ​ ​ ​ | 2026 | ​ ​ ​ | 2025
Beginning balance | ​ | $ | 84,696 | ​ | $ | 87,162
Contingent consideration recorded at acquisition date | ​ |  | 1,578 | ​ |  | 10,864
Payment of contingent consideration recorded at acquisition date | ​ |  | (4,707) | ​ |  | (22,895)
Payment of contingent consideration recorded in earnings | ​ |  | (1) | ​ |  | (400)
Adjustments to contingent consideration | ​ | ​ | (1,315) | ​ |  | 30,584
Interest accretion expense | ​ |  | 1,546 | ​ |  | 1,741
Foreign currency translation adjustment | ​ |  | (734) | ​ |  | 1,016
Ending balance | ​ | $ | 81,063 | ​ | $ | 108,072

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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