Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares, outstanding		125,028
Total stockholders' equity	$ 525,146	$ 1,080	$ 1,298,094	$ 1,077,189	$ (1,840,591)	$ (10,626)
Net earnings	47,330			47,330
Total other comprehensive (loss) income	3,104					3,104
Exercise of stock options, shares		55
Exercise of stock options	684	$ 1	683
Vesting of restricted share units, net of shares withheld for employee taxes, shares		204
Vesting of restricted share units, net of shares withheld for employee taxes	0	$ 31	(31)
Tax effect of stock awards vested and options exercised	(2,535)		(2,535)
Stock-based compensation	115,681		115,681
Dividends declared	(19,068)			(19,068)
Net earnings	6,075
Total other comprehensive (loss) income	4,520
Common stock, shares, outstanding		125,287
Total stockholders' equity	670,342	$ 1,112	1,411,892	1,105,451	(1,840,591)	(7,522)
Net earnings	(45,618)			(45,618)
Total other comprehensive (loss) income	4,145					4,145
Exercise of stock options, shares		19
Exercise of stock options	371	$ 0	371
Vesting of restricted share units, net of shares withheld for employee taxes, shares		2
Vesting of restricted share units, net of shares withheld for employee taxes	0	$ 1	(1)
Stock-based compensation	15,425		15,425
Dividends declared	(19,072)			(19,072)
Common stock, shares, outstanding		125,308
Total stockholders' equity	625,593	$ 1,113	1,427,687	1,040,761	(1,840,591)	(3,377)
Net earnings	4,363			4,363
Total other comprehensive (loss) income	(2,729)					(2,729)
Purchase of treasury stock	(27,151)	$ (9)			(27,142)
Exercise of stock options, shares		27
Exercise of stock options	463	$ 0	463
Vesting of restricted share units, net of shares withheld for employee taxes, shares		19
Vesting of restricted share units, net of shares withheld for employee taxes	0	$ 4	(4)
Tax effect of stock awards vested and options exercised	(97)		(97)
Stock-based compensation	15,618		15,618
Dividends declared	(18,815)			(18,815)
Common stock, shares, outstanding		125,354
Total stockholders' equity	597,245	$ 1,108	1,443,667	1,026,309	(1,867,733)	(6,106)
Common stock, shares, outstanding		125,415
Total stockholders' equity	560,372	$ 1,100	1,459,709	994,892	(1,890,966)	(4,363)
Net earnings	27,687			27,687
Total other comprehensive (loss) income	676					676
Exercise of stock options, shares		35
Exercise of stock options	855	$ 0	855
Vesting of restricted share units, net of shares withheld for employee taxes, shares		234
Vesting of restricted share units, net of shares withheld for employee taxes	0	$ 6	(6)
Tax effect of stock awards vested and options exercised	(2,978)		(2,978)
Stock-based compensation	11,940		11,940
Dividends declared	(20,257)			(20,257)
Net earnings	92,496
Total other comprehensive (loss) income	(5,703)
Common stock, shares, outstanding		125,684
Total stockholders' equity	578,295	$ 1,106	1,469,520	1,002,322	(1,890,966)	(3,687)
Net earnings	33,949			33,949
Total other comprehensive (loss) income	(3,839)					(3,839)
Exercise of stock options, shares		9
Exercise of stock options	194	$ 0	194
Vesting of restricted share units, net of shares withheld for employee taxes, shares		23
Vesting of restricted share units, net of shares withheld for employee taxes	0	$ 1	(1)
Tax effect of stock awards vested and options exercised	(76)		(76)
Stock-based compensation	8,048		8,048
Dividends declared	(20,270)			(20,270)
Common stock, shares, outstanding		125,716
Total stockholders' equity	596,301	$ 1,107	1,477,685	1,016,001	(1,890,966)	(7,526)
Net earnings	30,860			30,860
Total other comprehensive (loss) income	(2,540)					(2,540)
Exercise of stock options, shares		12
Exercise of stock options	274	$ 0	274
Vesting of restricted share units, net of shares withheld for employee taxes, shares		29
Vesting of restricted share units, net of shares withheld for employee taxes	0	$ 0	0
Tax effect of stock awards vested and options exercised	(369)		(369)
Stock-based compensation	7,575		7,575
Dividends declared	(20,281)			(20,281)
Common stock, shares, outstanding		125,757
Total stockholders' equity	$ 611,820	$ 1,107	$ 1,485,165	$ 1,026,580	$ (1,890,966)	$ (10,066)