Shareholders' Equity - Changes in Shareholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests
Beginning Balance	$ 1,069,832	$ 985,068	$ 975,016	$ 912,082
Proceeds from exercise of stock options	20		$ 20
Proceeds from exercise of stock options (shares)			3
Stock-based compensation expense	3,141	4,329	$ 13,010	15,755
Dividends paid				(30,487)
Other adjustment	2		(89)
Shares withheld for net settlements of share - based awards		(90)	(1,301)	(2,091)
Issuance of common stock - ESPP	48	72	150	252
Purchase of treasury shares				(153)
Other adjustment to additional paid-in capital		(3,600)		(3,447)
Net income (loss)	38,312	34,641	130,164	127,057
Other comprehensive income (loss)	(775)	(2,714)	(6,390)	(1,262)
Ending Balance	1,110,580	1,017,706	1,110,580	1,017,706
Common shares
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests
Beginning Balance	$ 1,289	$ 1,273	$ 1,273	$ 1,262
Beginning Balance (shares)	124,003	122,409	122,472	121,318
Proceeds from exercise of stock options (shares)	3		3
Restricted stock granted	$ 1		$ 18	$ 16
Restricted stock granted (shares)	50	103	1,836	1,551
Restricted stock canceled				$ (2)
Restricted stock canceled (shares)	(6)	(43)	(46)	(154)
Shares withheld for net settlements of share - based awards			$ (1)	$ (3)
Shares withheld for net settlements of share-based awards (shares)		(12)	(229)	(268)
Issuance of common stock - ESPP (shares)	7	8	21	35
Purchase of treasury shares (in shares)				(17)
Ending Balance	$ 1,290	$ 1,273	$ 1,290	$ 1,273
Ending Balance (shares)	124,057	122,465	124,057	122,465
Additional Paid-In Capital
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests
Beginning Balance	$ 1,284,867	$ 1,272,014	$ 1,276,213	$ 1,262,267
Proceeds from exercise of stock options	20		20
Stock-based compensation expense	3,141	4,329	13,010	15,755
Restricted stock granted	(1)		(18)	(16)
Restricted stock canceled				2
Shares withheld for net settlements of share - based awards		(90)	(1,300)	(2,088)
Issuance of common stock - ESPP	48	72	150	252
Other adjustment to additional paid-in capital		(3,600)		(3,447)
Ending Balance	1,288,075	1,272,725	1,288,075	1,272,725
Accumulated Deficit
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests
Beginning Balance	(84,105)	(160,875)	(175,960)	(222,892)
Dividends paid				(30,487)
Other adjustment	2		(89)
Net income (loss)	38,337	34,710	130,283	127,214
Ending Balance	(45,766)	(126,165)	(45,766)	(126,165)
Accumulated Other Comprehensive Loss
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests
Beginning Balance	(25,839)	(21,132)	(20,216)	(22,589)
Other comprehensive income (loss)	(798)	(2,722)	(6,421)	(1,265)
Ending Balance	(26,637)	(23,854)	(26,637)	(23,854)
Treasury shares
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests
Beginning Balance	$ (105,099)	$ (105,099)	$ (105,099)	$ (104,946)
Beginning Balance (shares)	4,852	4,852	4,852	4,835
Purchase of treasury shares				$ (153)
Purchase of treasury shares (in shares)				17
Ending Balance	$ (105,099)	$ (105,099)	$ (105,099)	$ (105,099)
Ending Balance (shares)	4,852	4,852	4,852	4,852
Noncontrolling Interests
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests
Beginning Balance	$ (1,281)	$ (1,113)	$ (1,195)	$ (1,020)
Net income (loss)	(25)	(69)	(119)	(157)
Other comprehensive income (loss)	23	8	31	3
Ending Balance	$ (1,283)	$ (1,174)	$ (1,283)	$ (1,174)