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Allowance for Loan and Lease Losses - Loans Modified in Troubled Debt Restructuring (Details) - Originated Loans and Leases $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 USD ($) loan | Sep. 30, 2018 USD ($) loan | Sep. 30, 2019 USD ($) loan | Sep. 30, 2018 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Loans | loan | 2 | 2 | 4 | 4
Pre-Modification Outstanding Recorded Investment | $ 1,586 | $ 115 | $ 2,349 | $ 227
Post-Modification Outstanding Recorded Investment | $ 1,586 | $ 115 | $ 2,349 | $ 227
Number of Loans | loan | 1 | 0 | 1 | 0
Post-Modification Outstanding Recorded Investment | $ 93 | $ 0 | $ 93 | $ 0
Commercial and industrial | Commercial and industrial, real estate other |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Loans | loan | 1 |  | 2 |
Pre-Modification Outstanding Recorded Investment | $ 9 |  | $ 604 |
Post-Modification Outstanding Recorded Investment | $ 9 |  | $ 604 |
Number of Loans | loan | 0 |  | 0 |
Post-Modification Outstanding Recorded Investment | $ 0 |  | $ 0 |
Commercial real estate | Commercial and industrial, real estate other |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Loans | loan | 1 |  | 1 |
Pre-Modification Outstanding Recorded Investment | $ 1,577 |  | $ 1,577 |
Post-Modification Outstanding Recorded Investment | $ 1,577 |  | $ 1,577 |
Number of Loans | loan | 0 |  | 0 |
Post-Modification Outstanding Recorded Investment | $ 0 |  | $ 0 |
Residential real estate | Home equity |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Loans | loan | 0 | 2 | 1 | 4
Pre-Modification Outstanding Recorded Investment | $ 0 | $ 115 | $ 168 | $ 227
Post-Modification Outstanding Recorded Investment | $ 0 | $ 115 | $ 168 | $ 227
Number of Loans | loan | 1 | 0 | 1 | 0
Post-Modification Outstanding Recorded Investment | $ 93 | $ 0 | $ 93 | $ 0

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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