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Recurring and Nonrecurring basis (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Trading | $ 1,500 | $ 1,300
Equity Securities, FV-NI | 19,477 | 0
Debt Securities, Available-for-sale | 442,752 | 447,498
Assets |  |
Disposal Group, Including Discontinued Operation, Mortgage Loans | 6,431 | 4,768
Total | 26,113 | 17,318
Equity Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 0 | 20,584
U.S. Government agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 32,038 | 35,430
Agency mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 220,105 | 215,764
Pooled trust preferred securities issued by banks and insurers |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 1,329 | 1,640
Small Business Administration Pooled Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 51,927 | 47,778
Fair Value, Measurements, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Trading | 1,504 | 1,324
Liabilities |  |
Total recurring fair value measurements | 478,951 | 455,373
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities, FV-NI | 19,477 |
Assets |  |
Securities - available for sale |  | 20,584
Fair Value, Measurements, Recurring [Member] | U.S. Government agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 32,038 | 35,430
Fair Value, Measurements, Recurring [Member] | Agency mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 220,105 | 215,764
Fair Value, Measurements, Recurring [Member] | Agency collateralized mortgage obligations |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 134,911 | 122,012
Fair Value, Measurements, Recurring [Member] | State, county, and municipal securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 1,735 | 2,274
Fair Value, Measurements, Recurring [Member] | Single issuer trust preferred securities issued by banks and insurers |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 707 | 2,016
Fair Value, Measurements, Recurring [Member] | Pooled trust preferred securities issued by banks and insurers |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 1,329 | 1,640
Fair Value, Measurements, Recurring [Member] | Small Business Administration Pooled Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 51,927 | 47,778
Fair Value, Measurements, Recurring [Member] | Loans held for sale |  |
Assets |  |
Disposal Group, Including Discontinued Operation, Mortgage Loans | 6,431 | 4,768
Fair Value, Measurements, Recurring [Member] | Derivative instruments |  |
Assets |  |
Total | 26,310 | 17,476
Fair Value, Measurements, Recurring [Member] | Derivative instruments |  |
Assets |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 17,523 | 15,693
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Trading | 1,504 | 1,324
Liabilities |  |
Total recurring fair value measurements | 20,981 | 21,908
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities, FV-NI | 19,477 |
Assets |  |
Securities - available for sale |  | 20,584
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | State, county, and municipal securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale |  | 0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Small Business Administration Pooled Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Liabilities |  |
Total recurring fair value measurements | 456,641 | 431,825
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities, FV-NI | 0 |
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Government agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 32,038 | 35,430
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Agency mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 220,105 | 215,764
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Agency collateralized mortgage obligations |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 134,911 | 122,012
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | State, county, and municipal securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 1,735 | 2,274
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Single issuer trust preferred securities issued by banks and insurers |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 707 | 2,016
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Small Business Administration Pooled Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 51,927 | 47,778
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Loans held for sale |  |
Assets |  |
Securities - available for sale | 6,431 | 4,768
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Derivative instruments |  |
Assets |  |
Total | 26,310 | 17,476
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Derivative instruments |  |
Assets |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 17,523 | 15,693
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Liabilities |  |
Total recurring fair value measurements | 1,329 | 1,640
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities, FV-NI | 0 |
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | State, county, and municipal securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale |  | 0
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Pooled trust preferred securities issued by banks and insurers |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 1,329 | 1,640
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Small Business Administration Pooled Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other real estate owned and other foreclosed assets |  |
Liabilities |  |
Assets, Fair Value Disclosure | 0 | 612
Fair Value, Measurements, Nonrecurring [Member] |  |
Assets |  |
Assets And Liabilities Fair Value Disclosure Nonrecurring | 29,109 | 34,179
Fair Value, Measurements, Nonrecurring [Member] | Collateral dependent impaired loans |  |
Liabilities |  |
Assets, Fair Value Disclosure | 29,109 | 33,567
Fair Value, Measurements, Nonrecurring [Member] | Other real estate owned and other foreclosed assets |  |
Liabilities |  |
Assets, Fair Value Disclosure |  | 612
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Assets |  |
Assets And Liabilities Fair Value Disclosure Nonrecurring | 29,109 | 34,179
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Collateral dependent impaired loans |  |
Liabilities |  |
Assets, Fair Value Disclosure | $ 29,109 | 33,567
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other real estate owned and other foreclosed assets |  |
Liabilities |  |
Assets, Fair Value Disclosure |  | $ 612

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