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Loans - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jul. 01, 2018
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Business Combination, Acquired Receivable, Fair Value | $ 272,753,000 |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount | 277,919,000 |  |  | $ 277,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables | 272,753,000 |  |  | 272,753,000
Business Combination, Acquired Receivables, Estimated Uncollectible | 0 |  |  |
Recorded Investment | 1,319,000 | $ 1,235,000 | $ 3,798,000 |
Loans and Leases Receivable, Deferred Income | 12,500,000 | 12,200,000 |  |
Net accretion of purchase accounting adjustments | (793,000) | 0 | 0 |
Deposit Liabilities Reclassified as Loans Receivable | 2,300,000 | 1,900,000 |  |
Troubled Debt Restructuring, Classification removed | 2,400,000 | 500,000 |  |
Partial charge-offs on impaired loans | 11,246,000 | 10,040,000 |  |
Allowance for loans individually evaluated for impairment | 2,273,000 | 684,000 |  |
Recorded investment, related to loans | 14,000,000 | 3,500,000 |  |
Loans 90 days past due and still accruing | 2,302,000 | 1,845,000 |  |
financing receivable non accrual current | 50,700,000 | 56,100,000 |  |
TDRs included in nonaccrual loan totals | 24,600,000 | 38,500,000 |  |
Nonaccrual TDRs considered current | 19,200,000 | 32,400,000 |  |
TDRs included in accruing loan totals | 15,200,000 | 20,200,000 |  |
Loans and Leases Receivable, Impaired, Commitment to Lend | 300,000 | 1,300,000 |  |
Specific reserves related to troubled debt restructuring | 1,200,000 | 500,000 |  |
Additional specific reserves related to troubled debt restructuring | 200,000 | 300,000 | 1,000,000 |
Modified substandard commercial loans, total recorded investment | 368,000 | 106,000 |  |
Modified substandard consumer loans total recorded investment | 20,900,000 | 8,900,000 |  |
Nonaccrual loans not classified as TDRs at prior fiscal year end | 500,000 | 1,800,000 | 9,400,000 |
Loans receivable |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Net accretion of purchase accounting adjustments | 4,400,000 |  |  |
Consumer |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Allowance for loans individually evaluated for impairment | 0 | 0 |  |
Loans 90 days past due and still accruing | 1,115,000 | 1,256,000 |  |
Executive officers and directors |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans due from related party | 35,900,000 | 42,100,000 |  |
New loan made to related party | 1,400,000 | 1,600,000 |  |
Repayment of loans due from related party | 11,500,000 | 11,400,000 |  |
Increase (Decrease) in Customer Advances | 4,900,000 | 11,400,000 |  |
Accruing |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Recorded Investment | 86,000 | 180,000 | 111,000 |
Nonaccrual |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Recorded Investment | 1,200,000 | 1,100,000 | $ 3,700,000 |
Financing Receivable With No Related Allowance Recorded [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Partial charge-offs on impaired loans | 8,800,000 | 7,900,000 |  |
Financing Receivable With Related Allowance Recorded [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Partial charge-offs on impaired loans | 2,400,000 | 2,100,000 |  |
Loans receivable | Executive officers and directors |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans due from related party | 25,900,000 | $ 31,100,000 |  |
Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Business Combination, Acquired Receivable, Fair Value | 4,400,000 |  |  | 4,900,000
Business Combination, Acquired Receivables, Gross Contractual Amount | $ 4,600,000 |  |  | $ 5,100,000

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