| Comprehensive income |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three months ended June 30, 2026 | | Six months ended June 30, 2026 | | | | Interest
rate cap
agreements | | Foreign
currency
translation
adjustments | | Accumulated
other
comprehensive
loss | | Interest
rate cap
agreements | | Foreign
currency
translation
adjustments | | Accumulated
other
comprehensive
loss | | | | | | | | | | Beginning balance | $ | (14,367) | | | $ | (72,592) | | | $ | (86,959) | | | $ | (22,398) | | | $ | (100,385) | | | $ | (122,783) | | | | | | | | | | | Unrealized gains | 3,729 | | | 22,732 | | | 26,461 | | | 10,596 | | | 50,525 | | | 61,121 | | | | | | | | | | | Related income tax | (930) | | | — | | | (930) | | | (2,643) | | | — | | | (2,643) | | | | | | | | | | | 2,799 | | | 22,732 | | | 25,531 | | | 7,953 | | | 50,525 | | | 58,478 | | | | | | | | | | | Reclassification into net income | 3,834 | | | — | | | 3,834 | | | 7,667 | | | — | | | 7,667 | | | | | | | | | | | Related income tax | (957) | | | — | | | (957) | | | (1,913) | | | — | | | (1,913) | | | | | | | | | | | 2,877 | | | — | | | 2,877 | | | 5,754 | | | — | | | 5,754 | | | | | | | | | | | Ending balance | $ | (8,691) | | | $ | (49,860) | | | $ | (58,551) | | | $ | (8,691) | | | $ | (49,860) | | | $ | (58,551) | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three months ended June 30, 2025 | | Six months ended June 30, 2025 | | Defined benefit pension plan | | Interest
rate cap
agreements | | Foreign
currency
translation
adjustments | | Accumulated
other
comprehensive
loss | | Defined benefit pension plan | | Interest
rate cap
agreements | | Foreign
currency
translation
adjustments | | Accumulated
other
comprehensive
loss | | Beginning balance | $ | 46 | | | $ | (15,585) | | | $ | (211,429) | | | $ | (226,968) | | | $ | 46 | | | $ | (8,557) | | | $ | (302,285) | | | $ | (310,796) | | | Unrealized (losses) gains | — | | | (8,533) | | | 94,001 | | | 85,468 | | | — | | | (19,906) | | | 184,857 | | | 164,951 | | | Related income tax | — | | | 2,128 | | | — | | | 2,128 | | | — | | | 4,966 | | | — | | | 4,966 | | | — | | | (6,405) | | | 94,001 | | | 87,596 | | | — | | | (14,940) | | | 184,857 | | | 169,917 | | | Reclassification into net income | — | | | 2,043 | | | — | | | 2,043 | | | — | | | 4,052 | | | — | | | 4,052 | | | Related income tax | — | | | (509) | | | — | | | (509) | | | — | | | (1,011) | | | — | | | (1,011) | | | — | | | 1,534 | | | — | | | 1,534 | | | — | | | 3,041 | | | — | | | 3,041 | | | Ending balance | $ | 46 | | | $ | (20,456) | | | $ | (117,428) | | | $ | (137,838) | | | $ | 46 | | | $ | (20,456) | | | $ | (117,428) | | | $ | (137,838) | |
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