XML 43 R32.htm IDEA: XBRL DOCUMENT v3.23.2
Basis of Presentation and Significant Accounting Policies - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive income (loss) $ 841,528 $ 788,008 $ 748,355 $ 704,350 $ 659,954 $ 637,235
Accumulated Other Comprehensive Income (Loss)            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive income (loss) (7,720) $ (19,034) (21,930) $ 3,261 $ 18,179 $ 12,143
Currency translation adjustments            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive income (loss) 8,410   (4,207)      
Net unrealized gain on derivative financial instruments            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive income (loss) 326   105      
Unrecognized prior service cost on benefit obligations            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive income (loss) (16,621)   (17,955)      
Net unrealized gain on available-for-sale investments            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive income (loss) $ 165   $ 127