Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock	Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares, outstanding		124,398
Total stockholders' equity	$ 513,276	$ 1,065	$ 1,146,509	$ 1,143,647	$ (1,765,574)	$ (12,371)
Net earnings (loss)	(4,237)			(4,237)
Total other comprehensive income	661					661
Exercise of stock options, shares		22
Exercise of stock options	477	$ 1	476
Vesting of restricted share units, net of shares withheld for employee taxes, shares		424
Vesting of restricted share units, net of shares withheld for employee taxes	0	$ 4	(4)
Tax effect of stock awards vested and options exercised	(8,466)		(8,466)
Stock-based compensation	41,410		41,410
Dividends declared	(20,063)			(20,063)
Common stock, shares, outstanding		124,844
Total stockholders' equity	523,058	$ 1,070	1,179,925	1,119,347	(1,765,574)	(11,710)
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 (loss)	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)