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, 2011	$ 169,105	$ 371	$ 184,207	$ 833,347	$ (9,479)	$ (839,341)
Beginning 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)						(3,026)
Shares tendered for taxes	(1,453)					(1,453)
Shares tendered for taxes (in shares)						(22)
Issuance of shares for Directors' compensation	37			(1)		38
Issuance of shares for Directors' compensation (in shares)						1
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
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)
Net income (loss)	29,253			29,253
Other comprehensive income (loss), net of income tax	(1,945)					(1,945)
Equity award vesting and exercises	0		(7,084)			7,084
Equity award vesting and exercises (in shares)						121
Tax benefit from equity awards	(4,409)		(4,409)
Stock-based compensation	10,336		10,336
Shares tendered for taxes	(914)					(914)
Shares tendered for taxes (in shares)						(42)
Issuance of shares for Directors' compensation	38			(32)		70
Issuance of shares for Directors' compensation (in shares)						1
Ending Balance at Dec. 31, 2014	$ 148,005	$ 371	$ 198,883	$ 969,670	$ 1,201	$ (1,022,120)
Ending Balance (in shares) at Dec. 31, 2014		37,069				(13,619)