Fair Value Disclosures - Assets And Liabilities Measured At Fair Value On Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets:
Assets measured at fair value on a recurring basis	$ 98,617	$ 89,406
Liabilities:
Liabilities measured at fair value on a recurring basis	176,732	206,112
Fair Value, Inputs, Level 1
Assets:
Assets measured at fair value on a recurring basis	8,785	2,589
Fair Value, Inputs, Level 2
Assets:
Assets measured at fair value on a recurring basis	89,832	86,817
Liabilities:
Liabilities measured at fair value on a recurring basis	176,732	206,112
Fair Value, Inputs, Level 2 | Foreign currency forward contracts
Assets:
Assets measured at fair value on a recurring basis	28	885
Liabilities:
Liabilities measured at fair value on a recurring basis	172	2,399
Fair Value, Inputs, Level 2 | Interest rate swap contracts
Liabilities:
Liabilities measured at fair value on a recurring basis	70,729	109,175
Fair Value, Inputs, Level 2 | Deferred compensation plan assets
Assets:
Assets measured at fair value on a recurring basis	89,804	85,932
Fair Value, Inputs, Level 2 | Deferred compensation plan liabilities
Liabilities:
Liabilities measured at fair value on a recurring basis	$ 105,831	$ 94,538