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 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)
Common stock, shares, outstanding		125,287
Total stockholders' equity	670,342	$ 1,112	1,411,892	1,105,451	(1,840,591)	(7,522)
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 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)
Common stock, shares, outstanding		125,684
Total stockholders' equity	$ 578,295	$ 1,106	$ 1,469,520	$ 1,002,322	$ (1,890,966)	$ (3,687)