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Allowance for Loan and Lease Losses - Average Recorded Investment and Interest Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Originated Loans and Leases |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Recorded Investment With No Related Allowance | $ 12,691 | $ 10,394 | $ 12,238 | $ 11,300
Interest Income Recognized With No Related Allowance | 0 | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 1,244 | 1,133 | 977 | 355
Interest Income Recognized With Related Allowance | 0 | 0 | 0 | 0
Total Average Recorded Investment | 13,935 | 11,527 | 13,215 | 11,655
Total Interest Income Recognized | 0 | 0 | 0 | 0
Total Acquired Loans |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Recorded Investment With No Related Allowance | 3,572 | 2,956 | 3,983 | 4,206
Interest Income Recognized With No Related Allowance | 0 | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 0 | 267 | 0 | 267
Interest Income Recognized With Related Allowance | 0 | 0 | 0 | 0
Total Average Recorded Investment | 3,572 | 3,223 | 3,983 | 4,473
Total Interest Income Recognized | 0 | 0 | 0 | 0
Commercial and industrial | Originated Loans and Leases | Other |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Recorded Investment With No Related Allowance | 2,963 | 404 | 2,370 | 290
Interest Income Recognized With No Related Allowance | 0 | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 1,200 | 1,083 | 955 | 335
Interest Income Recognized With Related Allowance | 0 | 0 | 0 | 0
Commercial and industrial | Total Acquired Loans | Other |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Recorded Investment With No Related Allowance | 289 | 0 | 235 | 66
Interest Income Recognized With No Related Allowance | 0 | 0 | 0 | 0
Commercial real estate | Originated Loans and Leases | Other |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Recorded Investment With No Related Allowance | 5,705 | 6,409 | 6,006 | 7,569
Interest Income Recognized With No Related Allowance | 0 | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 44 | 50 | 22 | 20
Interest Income Recognized With Related Allowance | 0 | 0 | 0 | 0
Commercial real estate | Total Acquired Loans | Other |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Recorded Investment With No Related Allowance | 1,504 | 1,516 | 1,613 | 2,402
Interest Income Recognized With No Related Allowance | 0 | 0 | 0 | 0
Average Recorded Investment With Related Allowance | 0 | 267 | 0 | 267
Interest Income Recognized With Related Allowance | 0 | 0 | 0 | 0
Commercial real estate | Total Acquired Loans | Construction |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Recorded Investment With No Related Allowance | 0 | 0 | 0 | 16
Interest Income Recognized With No Related Allowance | 0 | 0 | 0 | 0
Residential real estate | Originated Loans and Leases | Home equity |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Recorded Investment With No Related Allowance | 4,023 | 3,581 | 3,862 | 3,441
Interest Income Recognized With No Related Allowance | 0 | 0 | 0 | 0
Residential real estate | Total Acquired Loans | Home equity |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Recorded Investment With No Related Allowance | 1,779 | 1,440 | 2,135 | 1,722
Interest Income Recognized With No Related Allowance | $ 0 | $ 0 | $ 0 | $ 0

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