Net Income Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 31,534	$ 18,847	$ 51,136	$ 35,323
Preferred Stock Dividends	(2,092)	0	(3,313)	0
Net income to common shareholders	29,442	18,847	47,823	35,323
Effect of dilutive stock options, income		0	0	0
Diluted net income	$ 29,442	$ 18,847	$ 47,823	$ 35,323
Weighted Average Common Shares	54,973,561	54,353,811	54,638,651	51,930,581
Effect of dilutive stock options, number of shares	0	0	0	0
Diluted, Weighted Average Number Common Shares	54,973,561	54,353,811	54,638,651	51,930,581
Basic Net Income Per Common Share	$ 0.54	$ 0.35	$ 0.88	$ 0.68
Diluted Net Income Per Common Share	$ 0.54	$ 0.35	$ 0.88	$ 0.68
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		15,000