Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Adjustment	Common Stock	Additional Paid-In Capital	Additional Paid-In Capital Adjustment	Accumulated Earnings	Accumulated Earnings Adjustment	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest
Balance at beginning of period (shares) at Dec. 31, 2019			31,097,000
Balance at beginning of period at Dec. 31, 2019	$ 1,025,406	$ (44,238)	$ 311	$ 222,590		$ 888,058	$ (44,238)	$ (88,766)	$ 3,213
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	120,205					119,878			327
Other comprehensive income (loss), net of tax	(66,060)							(66,056)	(4)
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes (shares)			191,000
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes	(4,863)		$ 2	(4,865)
Stock-based compensation	9,305			9,305
Stockholders' Equity, Other	2,632							2,632
Balance at end of period (shares) at Jun. 30, 2020			31,288,000
Balance at end of period at Jun. 30, 2020	1,042,387		$ 313	227,030		963,698		(152,190)	3,536
Balance at beginning of period (shares) at Mar. 31, 2020			31,234,000
Balance at beginning of period at Mar. 31, 2020	905,811		$ 312	222,403		833,366		(153,355)	3,085
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	130,784					130,332			452
Other comprehensive income (loss), net of tax	(1,468)							(1,467)	(1)
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes (shares)			54,000
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes	(150)		$ 1	(151)
Stock-based compensation	4,778			4,778
Stockholders' Equity, Other	2,632							2,632
Balance at end of period (shares) at Jun. 30, 2020			31,288,000
Balance at end of period at Jun. 30, 2020	1,042,387		$ 313	227,030		963,698		(152,190)	3,536
Balance at beginning of period (shares) at Dec. 31, 2020			31,345,000
Balance at beginning of period at Dec. 31, 2020	1,220,076	$ (17,914)	$ 313	230,440	$ (40,372)	1,055,668	$ 22,458	(68,813)	2,468
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	191,552					191,133			419
Other comprehensive income (loss), net of tax	9,773							9,773	0
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	(5,556)			(2,669)					(2,887)
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes (shares)			191,000
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes	$ (5,216)		$ 2	(5,218)
Stock Repurchased During Period (in shares)	(1,122,855)		(1,123,000)
Stock Repurchased During Period, Value	$ (47,421)		$ (11)	(47,410)
Stock-based compensation	9,056			9,056
Balance at end of period (shares) at Jun. 30, 2021			30,413,000
Balance at end of period at Jun. 30, 2021	1,354,350		$ 304	143,827		1,269,259		(59,040)	0
Balance at beginning of period (shares) at Mar. 31, 2021			31,010,000
Balance at beginning of period at Mar. 31, 2021	1,278,784		$ 310	167,655		1,172,756		(64,541)	2,604
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	96,787					96,503			284
Other comprehensive income (loss), net of tax	5,500							5,501	(1)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	(5,556)			(2,669)					(2,887)
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes (shares)			8,000
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes	$ 215			215
Stock Repurchased During Period (in shares)	(604,995)		(605,000)
Stock Repurchased During Period, Value	$ (27,031)		$ (6)	(27,025)
Stock-based compensation	5,651			5,651
Balance at end of period (shares) at Jun. 30, 2021			30,413,000
Balance at end of period at Jun. 30, 2021	$ 1,354,350		$ 304	$ 143,827		$ 1,269,259		$ (59,040)	$ 0