Fair Value Measurements - Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Assets:
Foreign currency forward exchange contracts and other	$ 15,564	$ 5,711	$ 8,573
Available-for-sale security	6,180	4,268	3,823
Total assets	21,744	9,979	12,396
Liabilities:
Foreign currency forward exchange contracts and other	6,300	25,494	13,941
Level 1
Assets:
Foreign currency forward exchange contracts and other	0	0	0
Available-for-sale security	6,180	4,268	3,823
Total assets	6,180	4,268	3,823
Liabilities:
Foreign currency forward exchange contracts and other	0	0	0
Level 2
Assets:
Foreign currency forward exchange contracts and other	15,564	5,711	8,573
Available-for-sale security	0	0	0
Total assets	15,564	5,711	8,573
Liabilities:
Foreign currency forward exchange contracts and other	6,300	25,494	13,941
Level 3
Assets:
Foreign currency forward exchange contracts and other	0	0	0
Available-for-sale security	0	0	0
Total assets	0	0	0
Liabilities:
Foreign currency forward exchange contracts and other	$ 0	$ 0	$ 0