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Fair Value (Carrying amount and estimated fair value of financial instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Level 1 [Member]    
ASSETS    
Cash and cash equivalents $ 48,552 $ 30,848
Mortgage loans AFS 0 0
Total loans 0 0
Less allowance for loan losses 0 0
Net loans 0 0
Accrued interest receivable 7,669 7,063
Equity securities without readily determinable fair values [1] 0 0
Originated mortgage servicing rights 0 0
LIABILITIES    
Deposits without stated maturities 824,518 811,992
Deposits with stated maturities 0 0
Borrowed funds 0 0
Accrued interest payable 804 680
Level 2 [Member]    
ASSETS    
Cash and cash equivalents 0 0
Mortgage loans AFS 2,837 1,587
Total loans 0 0
Less allowance for loan losses 0 0
Net loans 0 0
Accrued interest receivable 0 0
Equity securities without readily determinable fair values [1] 0 0
Originated mortgage servicing rights 2,447 2,409
LIABILITIES    
Deposits without stated maturities 0 0
Deposits with stated maturities 440,576 443,892
Borrowed funds 354,615 342,089
Accrued interest payable 0 0
Level 3 [Member]    
ASSETS    
Cash and cash equivalents 0 0
Mortgage loans AFS 0 0
Total loans 1,110,857 1,056,906
Less allowance for loan losses 8,100 7,700
Net loans 1,102,757 1,049,206
Accrued interest receivable 0 0
Equity securities without readily determinable fair values [1] 0 0
Originated mortgage servicing rights 0 0
LIABILITIES    
Deposits without stated maturities 0 0
Deposits with stated maturities 0 0
Borrowed funds 0 0
Accrued interest payable 0 0
Carrying Value [Member]    
ASSETS    
Cash and cash equivalents 48,552 30,848
Mortgage loans AFS 2,811 1,560
Total loans 1,139,930 1,091,519
Less allowance for loan losses 8,100 7,700
Net loans 1,131,830 1,083,819
Accrued interest receivable 7,669 7,063
Equity securities without readily determinable fair values [1] 24,948 23,454
Originated mortgage servicing rights 2,403 2,409
LIABILITIES    
Deposits without stated maturities 824,518 811,992
Deposits with stated maturities 452,288 453,266
Borrowed funds 359,776 344,878
Accrued interest payable 804 680
Estimated Fair Value [Member]    
ASSETS    
Cash and cash equivalents 48,552 30,848
Mortgage loans AFS 2,837 1,587
Total loans 1,110,857 1,056,906
Less allowance for loan losses 8,100 7,700
Net loans 1,102,757 1,049,206
Accrued interest receivable 7,669 7,063
Originated mortgage servicing rights 2,447 2,409
LIABILITIES    
Deposits without stated maturities 824,518 811,992
Deposits with stated maturities 440,576 443,892
Borrowed funds 354,615 342,089
Accrued interest payable $ 804 $ 680
[1] Due to the characteristics of equity securities without readily determinable fair values, they are not disclosed under a specific fair value hierarchy. If we were to record an impairment adjustment related to these securities, such amount would be classified as a nonrecurring Level 3 fair value adjustment.