Condensed Consolidated Statement of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock Held in Treasury	Accumulated Other Comprehensive Income
Balance at Dec. 31, 2011	$ 671,114	$ 519	$ 249,469	$ 653,344	$ (240,559)	$ 8,341
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(241,406)			(241,406)
Other comprehensive income	3,491					3,491
Issuance of common stock for restricted share awards (508,880 shares) and employee stock unit awards (71,610 shares), net of tax benefit decrease of $3.4 million	(1,908)		(12,758)		10,850
Awards classified to liability for cash settlement (259,840 shares)	(2,838)		(2,838)
Issuance of common stock for the employee stock purchase plan (137,782 shares)	1,131	1	1,130
Shares withheld for net settlement of share-based awards (208,886 shares)	(2,306)				(2,306)
Purchase of common stock for treasury (1,770,000 shares)	(17,540)				(17,540)
Share-based compensation	8,910		8,910
Balance at Sep. 30, 2012	$ 418,648	$ 520	$ 243,913	$ 411,938	$ (249,555)	$ 11,832