Fair Value Measurements - Schedule Of Estimated Fair Values (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financial assets:
Derivative asset	$ 1,208	$ 1,639
Purchased receivables, net	20,491	13,326
Mortgage servicing rights	4,157	1,654
Financial liabilities:
Total other liabilities	149	216
Unrecognized financial instruments:
Commitments to extend credit	236,624	222,387
Standby letters of credit	9,931	6,399
Carrying Amount
Unrecognized financial instruments:
Commitments to extend credit	236,624	222,387
Standby letters of credit	9,931	6,399
Fair Value
Unrecognized financial instruments:
Commitments to extend credit	2,366	2,224
Standby letters of credit	99	64
Level 1 inputs:
Financial assets:
Mortgage servicing rights	0	0
Financial liabilities:
Total other liabilities	0	0
Level 1 inputs: | Carrying Amount
Financial assets:
Cash, due from banks and deposits in other banks	50,551	58,673
Investment securities	43,486	43,033
Level 1 inputs: | Fair Value
Financial assets:
Cash, due from banks and deposits in other banks	50,551	58,673
Investment securities	43,486	43,033
Level 2 inputs:
Financial assets:
Mortgage servicing rights	0	0
Financial liabilities:
Total other liabilities	149	216
Level 2 inputs: | Carrying Amount
Financial assets:
Investment securities	288,632	248,983
Investment in Federal Home Loan Bank Stock	1,965	1,816
Accrued interest receivable	3,734	3,620
Financial liabilities:
Deposits	1,267,653	1,240,792
Securities sold under repurchase agreements	27,607	31,420
Borrowings	4,338	2,120
Accrued interest payable	64	56
Level 2 inputs: | Fair Value
Financial assets:
Investment securities	288,655	249,039
Investment in Federal Home Loan Bank Stock	1,965	1,816
Accrued interest receivable	3,734	3,620
Financial liabilities:
Deposits	1,266,995	1,240,223
Securities sold under repurchase agreements	27,607	31,420
Borrowings	4,186	2,101
Accrued interest payable	64	56
Level 3 inputs:
Financial assets:
Mortgage servicing rights	4,157	1,654
Financial liabilities:
Total other liabilities	0	0
Level 3 inputs: | Carrying Amount
Financial assets:
Loans and loans held for sale	1,018,611	1,031,340
Purchased receivables, net	20,491	13,326
Mortgage servicing rights	4,157	1,654
Financial liabilities:
Accrued liability, RML acquisition payments	186	6,624
Junior subordinated debentures	18,558	18,558
Level 3 inputs: | Fair Value
Financial assets:
Loans and loans held for sale	1,026,350	1,033,551
Purchased receivables, net	20,491	13,326
Mortgage servicing rights	4,157	1,654
Financial liabilities:
Accrued liability, RML acquisition payments	4,500	6,624
Junior subordinated debentures	18,398	17,433
Commercial interest rate swaps
Financial assets:
Derivative asset	71	125
Financial liabilities:
Total other liabilities	71	125
Commercial interest rate swaps | Level 1 inputs:
Financial assets:
Derivative asset	0	0
Financial liabilities:
Total other liabilities	0	0
Commercial interest rate swaps | Level 2 inputs:
Financial assets:
Derivative asset	71	125
Financial liabilities:
Total other liabilities	71	125
Commercial interest rate swaps | Level 2 inputs: | Carrying Amount
Financial assets:
Derivative asset	71	125
Financial liabilities:
Total other liabilities	71	125
Commercial interest rate swaps | Level 2 inputs: | Fair Value
Financial assets:
Derivative asset	71	125
Financial liabilities:
Total other liabilities	71	125
Commercial interest rate swaps | Level 3 inputs:
Financial assets:
Derivative asset	0	0
Financial liabilities:
Total other liabilities	0	0
Interest rate lock commitments
Financial assets:
Derivative asset	1,137	1,514
Interest rate lock commitments | Level 1 inputs:
Financial assets:
Derivative asset	0	0
Interest rate lock commitments | Level 2 inputs:
Financial assets:
Derivative asset	0	0
Interest rate lock commitments | Level 3 inputs:
Financial assets:
Derivative asset	1,137	1,514
Interest rate lock commitments | Level 3 inputs: | Carrying Amount
Financial assets:
Derivative asset	1,137	1,514
Interest rate lock commitments | Level 3 inputs: | Fair Value
Financial assets:
Derivative asset	1,137	1,514
Retail interest rate contracts
Financial liabilities:
Total other liabilities	78	91
Retail interest rate contracts | Level 1 inputs:
Financial liabilities:
Total other liabilities	0	0
Retail interest rate contracts | Level 2 inputs:
Financial liabilities:
Total other liabilities	78	91
Retail interest rate contracts | Level 2 inputs: | Carrying Amount
Financial liabilities:
Total other liabilities	78	91
Retail interest rate contracts | Level 2 inputs: | Fair Value
Financial liabilities:
Total other liabilities	78	91
Retail interest rate contracts | Level 3 inputs:
Financial liabilities:
Total other liabilities	$ 0	$ 0