Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
A reconciliation between basic and diluted earnings per share computations
Net income (loss) available to common stockholders	$ (38,639)	$ 3,727	$ (111,767)	$ 2,579
Net loss available to common stockholders (in shares)	62,492	62,041	62,356	61,876
Atributable to participating securities		(95)		(76)
Net income or loss available to common stockholders, Loss (excluding income attributable to participating securities)		3,632		2,503
Stock options, Effect of dilutive securities
Net loss available to common stockholders, Per Share Amount	$ (0.62)	$ 0.06	$ (1.79)	$ 0.04
Stock options, effect of dilutive securities, (in shares)		374		402
Dilutive Securities, Effect on Basic Earnings Per Share, Restricted Stock		(94)		(76)
Restricted stock, effect of dilutive securities (in shares)	0	0	0	0
DILUTED EPS, Loss	$ (38,639)	$ 3,633	$ (111,767)	$ 2,503
DILUTED EPS, Shares	62,492	62,415	62,356	62,278
DILUTED EPS, Per Share Amount	$ (0.62)	$ 0.06	$ (1.79)	$ 0.04