Net Income Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 30,866	$ (4,627)	$ 24,133	$ 46,510
Preferred Stock Dividends	(2,294)	(2,294)	(6,882)	(5,608)
Net income (loss) to common shareholders	28,572	(6,921)	17,251	40,902
Weighted average common shares - basic and diluted	54,731,414	54,903,637	54,689,762	54,727,950
Effect of dilutive stock options on net income (loss)	0	0	0	0
Diluted net income (loss) to common shareholders	$ 28,572	$ (6,921)	$ 17,251	$ 40,902
Effect of dilutive instruments on weighted average common shares	0	0	0	0
Diluted, Weighted Average Number Common Shares	54,731,414	54,903,637	54,689,762	54,727,950
Net income (loss) per common share - basic and diluted	$ 0.52	$ (0.13)	$ 0.32	$ 0.75