CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Common Stock in Treasury [Member]
Beginning Balance at Dec. 31, 2010	$ 127,042	$ 371	$ 170,966	$ 526,619	$ (4,509)	$ (566,405)
Beginning Balance (in shares) at Dec. 31, 2010		37,069				(7,076)
Net income (loss)	309,086			309,086
Other comprehensive income (loss), net of income tax	(4,970)				(4,970)
Equity award vesting and exercises	5,599		(2,397)	(2,359)		10,355
Equity award vesting and exercises (in shares)						155
Tax benefit from equity awards	1,190		1,190
Stock-based compensation	14,448		14,448
Common shares repurchased	(282,701)					(282,701)
Common shares repurchased (in shares)						(4,040)
Issuance of shares for Directors' compensation	30			1		29
Issuance of shares for Directors' compensation (in shares)						1
Shares tendered for taxes	(619)					(619)
Shares tendered for taxes (in shares)						(9)
Ending Balance at Dec. 31, 2011	169,105	371	184,207	833,347	(9,479)	(839,341)
Ending Balance (in shares) at Dec. 31, 2011		37,069				(10,969)
Net income (loss)	138,970			138,970
Other comprehensive income (loss), net of income tax	1,549				1,549
Equity award vesting and exercises	8,345		(4,224)	(4,843)		17,412
Equity award vesting and exercises (in shares)						272
Tax benefit from equity awards	918		918
Stock-based compensation	16,212		16,212
Common shares repurchased	(207,918)					(207,918)
Common shares repurchased (in shares)	(3,025,700)					(3,026)
Issuance of shares for Directors' compensation	37			(1)		38
Issuance of shares for Directors' compensation (in shares)						1
Shares tendered for taxes	(1,453)					(1,453)
Shares tendered for taxes (in shares)						(22)
Ending Balance at Dec. 31, 2012	125,765	371	197,113	967,473	(7,930)	(1,031,262)
Ending Balance (in shares) at Dec. 31, 2012		37,069				(13,744)
Net income (loss)	(27,024)			(27,024)
Other comprehensive income (loss), net of income tax	11,076				11,076
Equity award vesting and exercises	0		(3,297)			3,297
Equity award vesting and exercises (in shares)						68
Tax benefit from equity awards	(5,414)		(5,414)
Stock-based compensation	11,638		11,638
Common shares repurchased	0
Common shares repurchased (in shares)	0
Shares tendered for taxes	(395)					(395)
Shares tendered for taxes (in shares)						(23)
Ending Balance at Dec. 31, 2013	$ 115,646	$ 371	$ 200,040	$ 940,449	$ 3,146	$ (1,028,360)
Ending Balance (in shares) at Dec. 31, 2013		37,069				(13,699)