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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at beginning of period $ 4,083,334 $ 3,762,859 $ 3,995,035 $ 3,699,701
Other comprehensive income (loss) before reclassifications     (5,683) (14,294)
Amounts reclassified from accumulated other comprehensive income (loss)     (419) (566)
Total other comprehensive income (loss) 6,034 407 (6,102) (14,860)
Balance at end of period 4,197,254 3,878,099 4,197,254 3,878,099
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     212 (1,573)
Other comprehensive income (loss) before reclassifications     308 490
Amounts reclassified from accumulated other comprehensive income (loss)     (165) (274)
Total other comprehensive income (loss)     143 216
Balance at end of period 355 (1,357) 355 (1,357)
Defined Benefit Pension        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at beginning of period     15,905 14,220
Other comprehensive income (loss) before reclassifications     0 0
Amounts reclassified from accumulated other comprehensive income (loss)     (254) (292)
Total other comprehensive income (loss)     (254) (292)
Balance at end of period 15,651 13,928 15,651 13,928
Foreign Currency Translation        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at beginning of period     233 4,052
Other comprehensive income (loss) before reclassifications     (5,991) (14,784)
Amounts reclassified from accumulated other comprehensive income (loss)     0 0
Total other comprehensive income (loss)     (5,991) (14,784)
Balance at end of period (5,758) (10,732) (5,758) (10,732)
Total        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at beginning of period 4,214 1,432 16,350 16,699
Total other comprehensive income (loss) 6,034 407 (6,102) (14,860)
Balance at end of period $ 10,248 $ 1,839 $ 10,248 $ 1,839