Investments (Private Label Mortgage Backed Securities) (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 RALI2004-QS4 A7 [Member] Lowest Credit Rating Assigned: Standard & Poor's, BBB+ Rating [Member]	Mar. 31, 2014 MALT2004-6 7A1 [Member] Lowest Credit Rating Assigned: Standard & Poor's, CCC Rating [Member]	Mar. 31, 2014 RALI2005-QS2 A1 [Member] Lowest Credit Rating Assigned: Standard & Poor's, C Rating [Member]	Mar. 31, 2014 RALI2006-QS4 A2 [Member] Lowest Credit Rating Assigned: Standard & Poor's, D Rating [Member]	Mar. 31, 2014 GSR 2006-5F 2A1 [Member] Lowest Credit Rating Assigned: Standard & Poor's, D Rating [Member]	Mar. 31, 2014 RALI2006-QS8 A1 [Member] Lowest Credit Rating Assigned: Standard & Poor's, D Rating [Member]	Mar. 31, 2014 Private-Label Mortgage-Backed Securities [Member]	Dec. 31, 2013 Private-Label Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Origination Date			Mar. 01, 2004	Jun. 01, 2004	Feb. 01, 2005	Apr. 01, 2006	May 01, 2006	Jul. 28, 2006
Amortized Cost	$ 160,947	$ 160,415	$ 157	$ 426	$ 318	$ 593	$ 94	$ 330	$ 1,918	$ 1,984
Investment securities available for sale, at fair value	161,626	159,674	164	446	331	565	102	314	1,922	1,969
Gross Unrealized Gain (Loss)			7	20	13	(28)	8	(16)	4
Collateral Type			ALT A	ALT A	ALT A	ALT A	Prime	ALT A
Lowest Credit Rating Assigned to Private Label Mortgage Backed Securities			BBB+	CCC	C	D	D	D
Credit Support %			12.55%	14.26%	5.82%
Cumulative OTTI Charges					$ 10	$ 293	$ 15	$ 197	$ 515