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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at beginning of period $ 4,232,074 $ 4,083,334 $ 4,183,165 $ 3,995,035
Total other comprehensive income (loss) (410) 6,034 4,379 (6,102)
Balance at end of period 4,342,944 4,197,254 4,342,944 4,197,254
Total        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at beginning of period     7,510 16,350
Other comprehensive income (loss) before reclassifications     4,872 (5,683)
Amounts reclassified from accumulated other comprehensive income (loss)     (493) (419)
Total other comprehensive income (loss)     4,379 (6,102)
Balance at end of period 11,889 10,248 11,889 10,248
Unrealized Gains (Losses) on Available-for-Sale Debt Investments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at beginning of period     (510) 212
Other comprehensive income (loss) before reclassifications     1,825 308
Amounts reclassified from accumulated other comprehensive income (loss)     (209) (165)
Total other comprehensive income (loss)     1,616 143
Balance at end of period 1,106 355 1,106 355
Defined Benefit Pension        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at beginning of period     16,570 15,905
Other comprehensive income (loss) before reclassifications     (2,386) 0
Amounts reclassified from accumulated other comprehensive income (loss)     (284) (254)
Total other comprehensive income (loss)     (2,670) (254)
Balance at end of period 13,900 15,651 13,900 15,651
Foreign Currency Translation        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at beginning of period     (8,550) 233
Other comprehensive income (loss) before reclassifications     5,433 (5,991)
Amounts reclassified from accumulated other comprehensive income (loss)     0 0
Total other comprehensive income (loss)     5,433 (5,991)
Balance at end of period $ (3,117) $ (5,758) $ (3,117) $ (5,758)