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Fair Values of Financial Instruments (Reconciliation of Beginning and Ending Balances of Level 3 Assets) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 375 $ 1,376
Principal returned (23) (285)
Amortization of premium/accretion of discount (494) (262)
Total gains (losses) (realized/unrealized): included in other comprehensive income (loss) 280 109
Total gains (losses) (realized/unrealized): included in operations (138) (563)
Ending balance $ 0 $ 375