Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
A reconciliation between basic and diluted earnings per share computations
Income available to common stockholders	$ 9,592	$ 3,662	$ 19,635	$ 6,269
Attributable to participating securities	(273)	(87)	(571)	(163)
Net income or loss available to common stockholders, Loss (excluding income attributable to participating securities)	9,319	3,575	19,064	6,106
Net loss available to common stockholders (in shares)	64,103	62,963	63,940	62,899
Stock options, Effect of dilutive securities		0		0
Net loss available to common stockholders, Per Share Amount	$ 0.15	$ 0.06	$ 0.30	$ 0.10
Stock options, effect of dilutive securities, (in shares)	64	167	56	185
Dilutive Securities, Effect on Basic Earnings Per Share, Restricted Stock	(273)	(87)	(571)	(163)
Restricted stock, effect of dilutive securities (in shares)	0	0	0	0
DILUTED EPS, Loss	$ 9,319	$ 3,575	$ 19,064	$ 6,106
DILUTED EPS, Shares	64,167	63,130	63,996	63,084
DILUTED EPS, Per Share Amount	$ 0.15	$ 0.06	$ 0.30	$ 0.10