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Mortgage Banking and Servicing Rights (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Mortgage Banking and Servicing Rights [Abstract]      
Net gain on sale of loans held for sale $ 1,978 $ 1,468 $ 3,098
Net loan servicing income (expense) [Abstract]      
Servicing fees 1,197 1,129 1,121
Late fees 88 112 98
Ancillary fees 212 149 368
Fair value adjustments (289) (830) 206
Net loan servicing income 1,208 560 1,793
Mortgage banking income 3,186 2,028 4,891
Loan service for benefit of others 458,000 441,000 456,000
Custodial escrow balance 986 888 855
Servicing Asset at Fair Value, Amount [Roll Forward]      
Fair value of MSRs, beginning of period 2,968 3,424 2,364
New servicing assets created 557 374 854
Change in fair value during the period due to [Abstract]      
Time decay [1] (168) (162) (159)
Payoffs [2] (247) (202) (423)
Changes in valuation inputs or assumptions [3] 126 (466) 788
Fair value of MSRs, end of period $ 3,236 $ 2,968 $ 3,424
Discount rate of servicing assets and servicing liabilities 10.10% 10.10% 10.00%
Weighted average default rates 2.64% 3.61% 3.36%
Prepayment speeds generated using Andrew Davidson Prepayment Model 10.00% 11.30% 9.70%
[1] Represents decrease in value due to regularly scheduled loan principal payments and partial loan paydowns.
[2] Represents decrease in value due to loans that paid off during the period.
[3] Represents change in value resulting from market-driven changes in interest rates.