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		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 (loss) 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)
Net earnings (loss)	9,710
Total other comprehensive (loss) income	(51)
Common stock, shares, outstanding		124,844
Total stockholders' equity	523,058	$ 1,070	1,179,925	1,119,347	(1,765,574)	(11,710)
Net earnings (loss)	19,725			19,725
Total other comprehensive (loss) income	(97)					(97)
Exercise of stock options, shares		52
Exercise of stock options	783		783
Vesting of restricted share units, net of shares withheld for employee taxes, shares		85
Vesting of restricted share units, net of shares withheld for employee taxes	0	$ 1	(1)
Tax effect of stock awards vested and options exercised	(969)		(969)
Stock-based compensation	36,438		36,438
Dividends declared	(20,104)			(20,104)
Common stock, shares, outstanding		124,981
Total stockholders' equity	558,834	$ 1,071	1,216,176	1,118,968	(1,765,574)	(11,807)
Net earnings (loss)	(5,778)			(5,778)
Total other comprehensive (loss) income	(615)					(615)
Purchase of treasury stock	(29,797)	$ (13)			(29,784)
Exercise of stock options, shares		33
Exercise of stock options	461		461
Vesting of restricted share units, net of shares withheld for employee taxes, shares		5
Vesting of restricted share units, net of shares withheld for employee taxes	0	$ 45	(45)
Tax effect of stock awards vested and options exercised	(42)		(42)
Stock-based compensation	44,773		44,773
Dividends declared	(19,673)			(19,673)
Common stock, shares, outstanding		125,019
Total stockholders' equity	548,163	$ 1,103	1,261,323	1,093,517	(1,795,358)	(12,422)
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 (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 (loss)	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 (loss)	(45,618)			(45,618)
Total other comprehensive (loss) income	4,145					4,145
Exercise of stock options, shares		19
Exercise of stock options	371		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 (loss)	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		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)