CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (unaudited) (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, 2012	$ 125,765	$ 371	$ 197,113	$ 967,473	$ (7,930)	$ (1,031,262)
Beginning Balance (in shares) at Dec. 31, 2012		37,069				(13,744)
Net income (loss)	12,357			12,357
Other comprehensive (loss), net of income tax	215				215
Equity award vesting	0		(3,277)			3,277
Equity award vesting (in shares)						68
Tax benefit from equity awards	(5,410)		(5,410)
Stock-based compensation	8,698		8,698
Shares tendered for taxes	(390)					(390)
Shares tendered for taxes (in shares)						(23)
Ending Balance at Sep. 30, 2013	141,235	371	197,124	979,830	(7,715)	(1,028,375)
Ending Balance (in shares) at Sep. 30, 2013		37,069				(13,699)
Net income (loss)	(39,381)			(39,381)
Other comprehensive (loss), net of income tax	10,861				10,861
Equity award vesting	0		(20)			20
Equity award vesting (in shares)						0
Tax benefit from equity awards	(4)		(4)
Stock-based compensation	2,940		2,940
Shares tendered for taxes	(5)					(5)
Shares tendered for taxes (in shares)						0
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)	14,336			14,336
Other comprehensive (loss), net of income tax	(714)				(714)
Equity award vesting	0		(7,076)			7,076
Equity award vesting (in shares)						120
Tax benefit from equity awards	(4,388)		(4,388)
Stock-based compensation	7,529		7,529
Shares tendered for taxes	(912)					(912)
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 Sep. 30, 2014	$ 131,535	$ 371	$ 196,105	$ 954,753	$ 2,432	$ (1,022,126)
Ending Balance (in shares) at Sep. 30, 2014		37,069				(13,620)