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Fair Value Measurements, By Balance Sheet Grouping (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Financial assets [Abstract] |  |
Interest bearing time deposits with other banks | $ 6,708 | $ 6,955
Available-for-sale securities | $ 281,773 | 314,017
Financial liabilities [Abstract] |  |
Consideration period for recognition of cash and due from banks | 90 days |
Consideration period for recognition of accrued interest receivable and payable | 90 days |
Level I [Member] |  |
Financial assets [Abstract] |  |
Cash and due from banks | $ 14,797 | 17,754
Interest bearing time deposits with other banks | 0 | 0
Available-for-sale securities | 1,659 | 5,899
Loans held for sale | 1,581 | 1,827
Net loans | 0 | 0
Bank owned life insurance | 26,389 | 26,223
Regulatory stock | 3,977 | 5,306
Accrued interest receivable | 3,618 | 4,089
Financial liabilities [Abstract] |  |
Deposits | 775,628 | 740,889
Borrowed funds | 6,849 | 41,330
Accrued interest payable | 612 | 720
Level II [Member] |  |
Financial assets [Abstract] |  |
Cash and due from banks | 0 | 0
Interest bearing time deposits with other banks | 0 | 0
Available-for-sale securities | 280,114 | 308,118
Net loans | 0 | 0
Bank owned life insurance | 0 | 0
Regulatory stock | 0 | 0
Accrued interest receivable | 0 | 0
Financial liabilities [Abstract] |  |
Deposits | 0 | 0
Borrowed funds | 0 | 0
Accrued interest payable | 0 | 0
Level III [Member] |  |
Financial assets [Abstract] |  |
Cash and due from banks | 0 | 0
Interest bearing time deposits with other banks | 6,712 | 6,960
Available-for-sale securities |  | 0
Net loans | 838,299 | 797,184
Bank owned life insurance | 0 | 0
Regulatory stock | 0 | 0
Accrued interest receivable | 0 | 0
Financial liabilities [Abstract] |  |
Deposits | 260,435 | 263,183
Borrowed funds | 38,255 | 36,095
Accrued interest payable | 0 |
Carrying Amount [Member] |  |
Financial assets [Abstract] |  |
Cash and due from banks | 14,797 | 17,754
Interest bearing time deposits with other banks | 6,708 | 6,955
Available-for-sale securities | 281,773 | 314,017
Loans held for sale | 1,581 | 1,827
Net loans | 835,902 | 790,725
Bank owned life insurance | 26,389 | 26,223
Regulatory stock | 3,977 | 5,306
Accrued interest receivable | 3,618 | 4,089
Financial liabilities [Abstract] |  |
Deposits | 1,037,609 | 1,005,503
Borrowed funds | 46,836 | 79,662
Accrued interest payable | 612 | 720
Fair Value [Member] |  |
Financial assets [Abstract] |  |
Cash and due from banks | 14,797 | 17,754
Interest bearing time deposits with other banks | 6,712 | 6,960
Available-for-sale securities | 281,773 | 314,017
Loans held for sale | 1,581 | 1,827
Net loans | 838,299 | 797,184
Bank owned life insurance | 26,389 | 26,223
Regulatory stock | 3,977 | 5,306
Accrued interest receivable | 3,618 | 4,089
Financial liabilities [Abstract] |  |
Deposits | 1,036,063 | 1,004,072
Borrowed funds | 45,104 | 77,425
Accrued interest payable | $ 612 | $ 720

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