Condensed Consolidated Statements Of Stockholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares, Outstanding		47,854,510		0
Stockholders' Equity Attributable to Parent	$ 1,020,305	$ 479	$ 325,854	$ 0	$ 723,062	$ (29,090)
Net income	18,871				18,871
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	22,681					3,810
Other Comprehensive Income (Loss), Net of Tax	3,810
Dividends, Common Stock, Cash	(19,884)				(19,884)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		27,679
Stock Issued During Period, Value, Stock Options Exercised	594	$ 0	594
Stock Issued During Period, Shares, Employee Stock Purchase Plans		851
Stock Issued During Period, Value, Employee Stock Purchase Plan	64	$ 0	64
Stock Issued During Period, Shares, Restricted Stock Award, Gross		18,052
Stock Issued During Period, Value, Restricted Stock Award, Gross	0	$ 0	0
Common Shares Repurchased And Retired During Period Shares		(7,942)
Stock Repurchased and Retired During Period, Value	(611)	$ 0	(495)		(116)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	6,420		6,390		30
Shares, Outstanding		47,893,150		0
Stockholders' Equity Attributable to Parent	1,031,168	$ 479	332,407	$ 0	723,562	(25,280)
Shares, Outstanding		48,082,800		(600,000)
Stockholders' Equity Attributable to Parent	1,035,744	$ 481	354,210	$ (42,543)	769,575	(45,979)
Cumulative Effect of New Accounting Principle in Period of Adoption	1,599				1,599
Net income	32,449				32,449
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	33,500					1,051
Other Comprehensive Income (Loss), Net of Tax	1,051
Dividends, Common Stock, Cash	$ (21,758)				(21,758)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	155,538	155,538
Stock Issued During Period, Value, Stock Options Exercised	$ 5,259	$ 2	5,257
Stock Issued During Period, Shares, Restricted Stock Award, Gross		39,077
Stock Issued During Period, Value, Restricted Stock Award, Gross		$ 0	0
Common Shares Repurchased And Retired During Period Shares		(16,400)
Stock Repurchased and Retired During Period, Value	$ (1,177)	$ 0	(1,201)		24
Treasury Stock, Shares, Retired	600,000	(600,000)
Treasury Stock, Retired, Cost Method, Amount		$ (6)	(4,385)	$ 42,543	(38,152)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	$ 5,086		5,051		35
Shares, Outstanding		47,661,015		0
Stockholders' Equity Attributable to Parent	$ 1,056,654	$ 477	$ 358,932	$ 0	$ 742,173	$ (44,928)