Shareholder's Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2000	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Preferred stock, shares sold	1,150		1,150	0
Preferred stock, sale price (in dollars per share)	$ 0.01		$ 0.01	$ 0
Carrying value including related surplus, net of issuance costs	$ 229,475		$ 229,475	$ 0
Preferred stock issued, value			$ 229,475	$ 117,000	$ 100,000
Preferred stock, liquidation preference (in dollars per share)	$ 200,000		$ 200,000	$ 0
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares sold	1,150		1,150
Preferred stock, sale price (in dollars per share)	$ 200,000		$ 200,000
Preferred stock, redemption period threshold following certain changes in regulatory capital requirements	90 days
Carrying value including related surplus, net of issuance costs	$ 229,000		$ 229,000
Preferred Class B
Class of Stock [Line Items]
Preferred stock issued, value		$ 21,000
Preferred stock outstanding, value	$ 23,000		$ 23,000	$ 24,000
Preferred stock, rate per annum			9.875%
Preferred stock, liquidation preference (in dollars per share)	$ 1,000		$ 1,000
Libor | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, variable rate on dividends	5.24%