Fair Value Measurement (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments under executive deferred compensation plan	$ 28,963	$ 32,447
Private equity securities measured at net asset value	4,667	4,661
Foreign currency forward contracts, assets	16,123	13,606
Obligations under executive deferred compensation plan	28,963	32,447
Foreign currency forward contracts, liabilities	3,917	4,803
Quoted Prices in Active Markets for Identical Items (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments under executive deferred compensation plan	28,963	32,447
Foreign currency forward contracts, assets	0	0
Obligations under executive deferred compensation plan	28,963	32,447
Foreign currency forward contracts, liabilities	0	0
Quoted Prices in Active Markets for Similar Items (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments under executive deferred compensation plan	0	0
Foreign currency forward contracts, assets	16,123	13,606
Obligations under executive deferred compensation plan	0	0
Foreign currency forward contracts, liabilities	3,917	4,803
Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments under executive deferred compensation plan	0	0
Foreign currency forward contracts, assets	0	0
Obligations under executive deferred compensation plan	0	0
Foreign currency forward contracts, liabilities	$ 0	$ 0