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Allowance for Loan and Lease Losses - Average Recorded Investment and Interest Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Originated Loans and Leases |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment With No Related Allowance | $ 11,548 | $ 12,752
Interest Income Recognized With No Related Allowance | 0 | 0
Average Recorded Investment With Related Allowance | 1,026 | 877
Interest Income Recognized With Related Allowance | 0 | 0
Total Average Recorded Investment | 12,574 | 13,629
Total Interest Income Recognized | 0 | 0
Total Acquired Loans |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment With No Related Allowance | 3,454 | 3,542
Interest Income Recognized With No Related Allowance | 0 | 0
Average Recorded Investment With Related Allowance | 0 | 37
Interest Income Recognized With Related Allowance | 0 | 0
Total Average Recorded Investment | 3,454 | 3,579
Total Interest Income Recognized | 0 | 0
Commercial and industrial | Originated Loans and Leases | Other |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment With No Related Allowance | 1,468 | 2,399
Interest Income Recognized With No Related Allowance | 0 | 0
Average Recorded Investment With Related Allowance | 581 | 864
Interest Income Recognized With Related Allowance | 0 | 0
Commercial and industrial | Total Acquired Loans | Other |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment With No Related Allowance | 22 | 265
Interest Income Recognized With No Related Allowance | 0 | 0
Average Recorded Investment With Related Allowance | 0 | 37
Interest Income Recognized With Related Allowance | 0 | 0
Commercial real estate | Originated Loans and Leases | Other |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment With No Related Allowance | 6,099 | 6,373
Interest Income Recognized With No Related Allowance | 0 | 0
Average Recorded Investment With Related Allowance | 445 | 13
Interest Income Recognized With Related Allowance | 0 | 0
Commercial real estate | Total Acquired Loans | Other |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment With No Related Allowance | 855 | 1,469
Interest Income Recognized With No Related Allowance | 0 | 0
Residential real estate | Originated Loans and Leases | Home equity |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment With No Related Allowance | 3,981 | 3,980
Interest Income Recognized With No Related Allowance | 0 | 0
Residential real estate | Total Acquired Loans | Home equity |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment With No Related Allowance | 2,577 | 1,808
Interest Income Recognized With No Related Allowance | $ 0 | $ 0

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