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Fair Value of Assets and Liabilities - Schedule Of Estimated Fair Values (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total marketable securities | $ 5,527 | $ 5,731
Purchased receivables, net | 19,412 | 22,231
Mortgage servicing rights | 8,039 | 7,305
Derivative liabilities | 236 | 77
Level 1 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total marketable securities | 5,527 |
Mortgage servicing rights | 0 | 0
Derivative liabilities | 0 | 0
Level 1 inputs | Carrying Amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash, due from banks and deposits in other banks | 83,962 | 77,841
Investment securities available for sale | 70,540 | 59,117
Total marketable securities | 5,527 |
Level 1 inputs | Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash, due from banks and deposits in other banks | 83,962 | 77,841
Investment securities available for sale | 70,540 | 59,117
Total marketable securities | 5,527 |
Level 2 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total marketable securities | 0 |
Mortgage servicing rights | 0 | 0
Derivative liabilities | 236 | 77
Level 2 inputs | Carrying Amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Investment securities available for sale | 227,033 | 253,633
Investment in Federal Home Loan Bank stock | 2,105 | 2,115
Accrued interest receivable | 4,390 | 4,385
Deposits | 1,260,790 | 1,258,283
Securities sold under repurchase agreements | 31,018 | 27,746
Borrowings | 7,338 | 7,362
Accrued interest payable | 58 | 24
Level 2 inputs | Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Investment securities available for sale | 227,033 | 253,633
Investment in Federal Home Loan Bank stock | 2,105 | 2,115
Accrued interest receivable | 4,390 | 4,385
Deposits | 1,259,613 | 1,257,670
Securities sold under repurchase agreements | 31,018 | 27,746
Borrowings | 6,993 | 7,308
Accrued interest payable | 58 | 24
Level 3 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total marketable securities | 0 |
Mortgage servicing rights | 8,039 | 7,305
Derivative liabilities | 0 | 0
Level 3 inputs | Carrying Amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Loans and loans held for sale1 | 1,008,790 | 999,445
Purchased receivables, net | 19,412 | 22,231
Mortgage servicing rights | 8,039 | 7,305
Junior subordinated debentures | 10,310 | 10,310
Level 3 inputs | Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Loans and loans held for sale1 | 1,003,372 | 1,001,346
Purchased receivables, net | 19,412 | 22,231
Mortgage servicing rights | 8,039 | 7,305
Junior subordinated debentures | 9,919 | 9,856
Interest rate swaps |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 784 | 261
Derivative liabilities | 133 | 77
Interest rate swaps | Level 1 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 0 | 0
Derivative liabilities | 0 | 0
Interest rate swaps | Level 2 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 784 | 261
Derivative liabilities | 133 | 77
Interest rate swaps | Level 2 inputs | Carrying Amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 784 | 261
Derivative liabilities | 133 | 77
Interest rate swaps | Level 2 inputs | Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 784 | 261
Derivative liabilities | 133 | 77
Interest rate swaps | Level 3 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 0 | 0
Derivative liabilities | 0 | 0
Interest rate lock commitments |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 1,323 | 873
Interest rate lock commitments | Level 1 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 0 | 0
Interest rate lock commitments | Level 2 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 0 | 0
Interest rate lock commitments | Level 3 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 1,323 | 873
Interest rate lock commitments | Level 3 inputs | Carrying Amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 1,323 | 873
Interest rate lock commitments | Level 3 inputs | Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative assets | 1,323 | 873
Retail interest rate contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative liabilities | 103 |
Retail interest rate contracts | Level 1 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative liabilities | 0 |
Retail interest rate contracts | Level 2 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative liabilities | 103 |
Retail interest rate contracts | Level 2 inputs | Carrying Amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative liabilities | 103 | 0
Retail interest rate contracts | Level 2 inputs | Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative liabilities | 103 | $ 0
Retail interest rate contracts | Level 3 inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative liabilities | $ 0 |

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