Common Stock and Dividends (Details) - USD ($)				3 Months Ended
	May. 02, 2016	Apr. 18, 2016	Apr. 09, 2016	Mar. 31, 2016
Common Stock and Dividends
Series A cumulative perpetual preferred shares, outstanding				216,000
Warrants to purchase entity's common stock (in shares)				1,326,238
Warrants, exercise price (in dollars per share)				$ 24.43
Percentage of aggregate common stock investment on exercise of warrant to Senior Preferred Stock investment				15.00%
Warrants, term				10 years
Cash dividends (as a percent)				0.33%
Cash dividends paid to common shareholders (in dollars per share)		$ 0.29
Repurchase of common stock, authorized amount			$ 40,000,000	$ 40,000,000
Period of repurchase of common stock			12 months
Cumulative number of shares repurchased under all stock repurchase programs	9,240,629
Cumulative cost of shares repurchased under all stock repurchase programs	$ 271,096,000