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Borrowed Funds (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017
Disclosure of Repurchase Agreements [Abstract] |  |  |  |  |  |  |  |
Range of repurchase agreements' maturity dates | one to 365 |  |  |  |  |  |  |
Amount of line of credit with correspondent banks | $ 46,000 |  |  |  |  |  |  |
Credit facility with Federal Reserve Bank | $ 84,000 |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Maturities Summary [Abstract] |  |  |  |  |  |  |  |
Interest rate, due in year three | 1.55% |  |  |  |  |  |  |
Interest rate, due in year four |  | 1.55% |  |  |  |  |  |
Interest rate, due thereafter | 0.00% |  |  |  |  |  |  |
Due in twelve months maturity | $ 105,000 | $ 43,074 |  |  |  |  |  |
Due in year two maturity | 55,000 |  |  |  |  |  |  |
Due in year three maturity | 10,000 | 55,000 |  |  |  |  |  |
Due in year four maturity |  | 10,000 |  |  |  |  |  |
Due thereafter | 112 | 50,120 |  |  |  |  |  |
Total | 170,112 | 158,194 |  |  |  |  |  |
Repurchase agreements for municipal and commercial customers | 40,205 | 70,564 |  |  |  |  |  |
Total | $ 210,317 | $ 228,758 | $ 265,274 | $ 297,455 | $ 244,229 | $ 234,328 | $ 282,277 | $ 226,467
Minimum |  |  |  |  |  |  |  |
Disclosure of Repurchase Agreements [Abstract] |  |  |  |  |  |  |  |
Range of repurchase agreements' maturity dates (days) | 1 day |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Maturities Summary [Abstract] |  |  |  |  |  |  |  |
Interest rate, due in next twelve months | 2.25% | 1.59% |  |  |  |  |  |
Interest rate, due in year two | 1.60% |  |  |  |  |  |  |
Interest rate, due in year three |  | 1.60% |  |  |  |  |  |
Interest rate, due thereafter |  | 0.00% |  |  |  |  |  |
Interest rate, Repurchase agreements for municipal and commercial customers | 0.15% | 0.15% |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |
Disclosure of Repurchase Agreements [Abstract] |  |  |  |  |  |  |  |
Range of repurchase agreements' maturity dates (days) | 365 days |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Maturities Summary [Abstract] |  |  |  |  |  |  |  |
Interest rate, due in next twelve months | 2.58% | 3.25% |  |  |  |  |  |
Interest rate, due in year two | 1.97% |  |  |  |  |  |  |
Interest rate, due in year three |  | 1.97% |  |  |  |  |  |
Interest rate, due thereafter |  | 0.99% |  |  |  |  |  |
Interest rate, Repurchase agreements for municipal and commercial customers | 2.00% | 2.48% |  |  |  |  |  |

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- Definition Represents the aggregate dollar amount of all future maturities of advances from the Federal Home Loan Bank, treasury tax and loan notes and securities sold under repurchase agreements as of balance sheet date. + References No definition available. + Details
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount of advances from Federal Home Loan Bank (FHLBank) maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49176635&loc=d3e9760-107771 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(a)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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