Consolidated Statement of Changes in Stockholders Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss)	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2018		45,304
Beginning balance at Dec. 31, 2018	$ 1,123,969	$ 453	$ 60,303	$ 1,276,473	$ (242,109)	$ 28,849
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	16,912			15,227		1,685
Currency translation adjustments	(1,173)				(742)	(431)
Cash flow hedges	(5,715)				(5,715)
Debt securities available-for-sale	45				45
Distributions to noncontrolling interest	(6,877)					(6,877)
Contributions from noncontrolling interest	89					89
Vesting of restricted stock (in shares)		80
Vesting of restricted stock	0	$ 1	(1)
Share-based compensation expense	2,314		2,314
Employee stock relinquished for payment of taxes	(1,437)		(1,437)
Other	(2,088)		(2,088)
Ending balance (in shares) at Mar. 31, 2019		45,384
Ending balance at Mar. 31, 2019	1,126,039	$ 454	59,091	1,291,700	(248,521)	23,315
Beginning balance (in shares) at Dec. 31, 2018		45,304
Beginning balance at Dec. 31, 2018	1,123,969	$ 453	60,303	1,276,473	(242,109)	28,849
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash flow hedges	(19,549)
Debt securities available-for-sale	81
Ending balance (in shares) at Sep. 30, 2019		45,411
Ending balance at Sep. 30, 2019	1,146,313	$ 454	64,631	1,335,290	(305,956)	51,894
Beginning balance (in shares) at Mar. 31, 2019		45,384
Beginning balance at Mar. 31, 2019	1,126,039	$ 454	59,091	1,291,700	(248,521)	23,315
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	22,200			18,619		3,581
Currency translation adjustments	4,740				4,362	378
Cash flow hedges	(8,002)				(8,002)
Debt securities available-for-sale	37				37
Contributions from noncontrolling interest	3,229					3,229
Vesting of restricted stock (in shares)		25
Vesting of restricted stock	0
Share-based compensation expense	2,620		2,620
Employee stock relinquished for payment of taxes	(6)		(6)
Ending balance (in shares) at Jun. 30, 2019		45,409
Ending balance at Jun. 30, 2019	1,150,857	$ 454	61,705	1,310,319	(252,124)	30,503
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27,548			24,971		2,577
Currency translation adjustments	(50,542)				(47,999)	(2,543)
Cash flow hedges	(5,832)				(5,832)
Debt securities available-for-sale	(1)				(1)
Distributions to noncontrolling interest	0
Contributions from noncontrolling interest	21,357					21,357
Vesting of restricted stock (in shares)		2
Vesting of restricted stock	0
Share-based compensation expense	2,974		2,974
Employee stock relinquished for payment of taxes	(48)		(48)
Ending balance (in shares) at Sep. 30, 2019		45,411
Ending balance at Sep. 30, 2019	$ 1,146,313	$ 454	64,631	1,335,290	(305,956)	51,894
Beginning balance (in shares) at Dec. 31, 2019	45,416	45,416
Beginning balance at Dec. 31, 2019	$ 1,227,013	$ 454	67,321	1,362,631	(261,018)	57,625
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	22,436			19,135		3,301
Currency translation adjustments	(108,076)				(94,201)	(13,875)
Cash flow hedges	(20,568)				(20,568)
Debt securities available-for-sale	170				170
Vesting of restricted stock (in shares)		124
Vesting of restricted stock	1	$ 1
Share-based compensation expense	2,857		2,857
Employee stock relinquished for payment of taxes	(3,157)		(3,157)
Ending balance (in shares) at Mar. 31, 2020		45,540
Ending balance at Mar. 31, 2020	$ 1,120,676	$ 455	67,021	1,381,766	(375,617)	47,051
Beginning balance (in shares) at Dec. 31, 2019	45,416	45,416
Beginning balance at Dec. 31, 2019	$ 1,227,013	$ 454	67,321	1,362,631	(261,018)	57,625
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash flow hedges	(22,927)
Debt securities available-for-sale	$ 191
Ending balance (in shares) at Sep. 30, 2020	45,579	45,579
Ending balance at Sep. 30, 2020	$ 1,272,172	$ 456	70,036	1,482,172	(313,560)	33,068
Beginning balance (in shares) at Mar. 31, 2020		45,540
Beginning balance at Mar. 31, 2020	1,120,676	$ 455	67,021	1,381,766	(375,617)	47,051
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	60,828			57,914		2,914
Currency translation adjustments	28,923				32,107	(3,184)
Cash flow hedges	(3,753)				(3,753)
Debt securities available-for-sale	51				51
Distributions to noncontrolling interest	(14,908)					(14,908)
Vesting of restricted stock (in shares)		39
Vesting of restricted stock	0	$ 1	(1)
Share-based compensation expense	3,063		3,063
Employee stock relinquished for payment of taxes	(18)		(18)
Ending balance (in shares) at Jun. 30, 2020		45,579
Ending balance at Jun. 30, 2020	1,194,862	$ 456	70,065	1,439,680	(347,212)	31,873
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	47,829			42,492		5,337
Currency translation adjustments	30,705				32,288	(1,583)
Cash flow hedges	1,394				1,394
Debt securities available-for-sale	(30)				(30)
Distributions to noncontrolling interest	(3,677)					(3,677)
Contributions from noncontrolling interest	1,118					1,118
Share-based compensation expense	3,097		3,097
Other	$ (3,126)		(3,126)
Ending balance (in shares) at Sep. 30, 2020	45,579	45,579
Ending balance at Sep. 30, 2020	$ 1,272,172	$ 456	$ 70,036	$ 1,482,172	$ (313,560)	$ 33,068