Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
A reconciliation between basic and diluted earnings per share computations
Net income (loss) available to common stockholders	$ 383	$ (38,639)	$ 6,652	$ (111,767)
Attributable to participating securities	(8)		(151)
Net income or loss available to common stockholders, Loss (excluding income attributable to participating securities)	375		6,501
Net loss available to common stockholders (in shares)	63,096	62,492	62,936	62,356
Stock options, Effect of dilutive securities
Net loss available to common stockholders, Per Share Amount (in dollars per share)	$ 0.01	$ (0.62)	$ 0.10	$ (1.79)
Stock options, effect of dilutive securities, (in shares)	146		169
Dilutive Securities, Effect on Basic Earnings Per Share, Restricted Stock	(8)		(151)	0
Restricted stock, effect of dilutive securities (in shares)	0	0	0	0
DILUTED EPS, Loss	$ 375	$ (38,639)	$ 6,501	$ (111,767)
DILUTED EPS, Shares	63,242	62,492	63,105	62,356
DILUTED EPS, Per Share Amount (in dollars per share)	$ 0.01	$ (0.62)	$ 0.10	$ (1.79)