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Investments (Private Label Mortgage Backed Securities) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]        
Amortized cost $ 167,319 $ 169,399    
Investment securities available for sale, at fair value 169,516 171,751    
Cumulative OTTI Charges 555 535 $ 515 $ 515
Private-Label Mortgage-Backed Securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Amortized cost 1,397 1,675    
Investment securities available for sale, at fair value 1,446 $ 1,695    
Gross Unrealized Gain (Loss) 49      
Cumulative OTTI Charges $ 555      
Lowest Credit Rating Assigned: Standard & Poor's, BBB+ Rating [Member] | RALI2004-QS4 A7 [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Origination Date Mar. 01, 2004      
Amortized cost $ 17      
Investment securities available for sale, at fair value $ 17      
Collateral Type ALT A      
Credit Support % 11.85%      
Lowest Credit Rating Assigned: Standard & Poor's, CCC Rating [Member] | MALT2004-6 7A1 [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Origination Date Jun. 01, 2004      
Amortized cost $ 362      
Investment securities available for sale, at fair value 370      
Gross Unrealized Gain (Loss) $ 8      
Collateral Type ALT A      
Credit Support % 14.74%      
Lowest Credit Rating Assigned: Standard & Poor's, CC Rating [Member] | RALI2005-QS2 A1 [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Origination Date Feb. 01, 2005      
Amortized cost $ 215      
Investment securities available for sale, at fair value 229      
Gross Unrealized Gain (Loss) $ 14      
Collateral Type ALT A      
Credit Support % 5.35%      
Cumulative OTTI Charges $ 10      
Lowest Credit Rating Assigned: Standard & Poor's, D Rating [Member] | RALI2006-QS4 A2 [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Origination Date Apr. 01, 2006      
Amortized cost $ 486      
Investment securities available for sale, at fair value 503      
Gross Unrealized Gain (Loss) $ 17      
Collateral Type ALT A      
Cumulative OTTI Charges $ 313      
Lowest Credit Rating Assigned: Standard & Poor's, D Rating [Member] | GSR 2006-5F 2A1 [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Origination Date May 01, 2006      
Amortized cost $ 63      
Investment securities available for sale, at fair value 71      
Gross Unrealized Gain (Loss) $ 8      
Collateral Type Prime      
Cumulative OTTI Charges $ 15      
Lowest Credit Rating Assigned: Standard & Poor's, D Rating [Member] | RALI2006-QS8 A1 [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Origination Date Jul. 28, 2006      
Amortized cost $ 254      
Investment securities available for sale, at fair value 256      
Gross Unrealized Gain (Loss) $ 2      
Collateral Type ALT A      
Cumulative OTTI Charges $ 217