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Fair Value - Impaired Loans Held-for-investment - Tabular Disclosure (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Impaired Loans Held-for-investment    
Impaired loans held-for-investment $ 6,527 $ 6,022
Portion carried at fair value    
Impaired Loans Held-for-investment    
Impaired loans held-for-investment 2,988 3,026
Specific valuation allowance (286) (404)
Impaired loans held-for-investment carried at fair value, net 2,702 2,622
Portion carried at cost    
Impaired Loans Held-for-investment    
Impaired loans held-for-investment $ 3,539 $ 2,996