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Allowance for Loan and Lease Losses - Average Recorded Investment and Interest Income Recognized (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | $ 17,900 | $ 15,800 | $ 17,000
Originated Loans and Leases |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment With No Related Allowance | 11,127 | 11,556 | 9,341
Interest Income Recognized With No Related Allowance | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 2,731 | 276 | 1,829
Interest Income Recognized With Related Allowance | 0 | 0 | 0
Average Recorded Investment | 13,858 | 11,832 | 11,170
Interest Income Recognized | 0 | 0 | 0
Originated Loans and Leases | Commercial and industrial | Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment With No Related Allowance | 1,979 | 718 | 249
Interest Income Recognized With No Related Allowance | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 1,374 | 276 | 114
Interest Income Recognized With Related Allowance | 0 | 0 | 0
Originated Loans and Leases | Commercial real estate | Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment With No Related Allowance | 5,165 | 7,287 | 6,089
Interest Income Recognized With No Related Allowance | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 1,357 | 0 | 1,715
Interest Income Recognized With Related Allowance | 0 | 0 | 0
Originated Loans and Leases | Residential real estate | Home equity |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment With No Related Allowance | 3,983 | 3,551 | 3,003
Interest Income Recognized With No Related Allowance | 0 | 0 | 0
Acquired Loans and Leases |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment With No Related Allowance | 3,994 | 4,113 | 5,792
Interest Income Recognized With No Related Allowance | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 0 | 10 | 58
Interest Income Recognized With Related Allowance | 0 | 0 | 0
Average Recorded Investment | 3,994 | 4,123 | 5,850
Interest Income Recognized | 0 | 0 | 0
Acquired Loans and Leases | Commercial and industrial | Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment With No Related Allowance | 50 | 111 | 183
Interest Income Recognized With No Related Allowance | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 0 | 10 | 0
Interest Income Recognized With Related Allowance | 0 | 0 | 0
Acquired Loans and Leases | Commercial real estate | Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment With No Related Allowance | 999 | 2,141 | 4,141
Interest Income Recognized With No Related Allowance | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 0 | 0 | 58
Interest Income Recognized With Related Allowance | 0 | 0 | 0
Acquired Loans and Leases | Commercial real estate | Construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment With No Related Allowance | 0 | 0 | 152
Interest Income Recognized With No Related Allowance | 0 | 0 | 0
Acquired Loans and Leases | Residential real estate | Home equity |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment With No Related Allowance | 2,945 | 1,861 | 1,316
Interest Income Recognized With No Related Allowance | $ 0 | $ 0 | $ 0

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