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Allowance for Loan and Lease Losses - Recorded Investment and Related Allowance (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Originated Loans and Leases |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Related Allowance | $ 13,752 | $ 11,837
Unpaid Principal Balance With No Related Allowance | 14,136 | 11,832
Recorded Investment With Related Allowance | 1,312 | 513
Unpaid Principal Balance With Related Allowance | 1,323 | 532
Related Allowance | 441 | 441
Recorded Investment | 15,064 | 12,350
Unpaid Principal Balance | 15,459 | 12,364
Total Acquired Loans |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Related Allowance | 3,323 | 3,421
Unpaid Principal Balance With No Related Allowance | 3,446 | 3,554
Recorded Investment With Related Allowance | 25 | 50
Unpaid Principal Balance With Related Allowance | 25 | 50
Related Allowance | 25 | 25
Recorded Investment | 3,348 | 3,471
Unpaid Principal Balance | 3,471 | 3,604
Commercial and industrial | Originated Loans and Leases | Other |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Related Allowance | 2,958 | 1,246
Unpaid Principal Balance With No Related Allowance | 2,958 | 1,250
Recorded Investment With Related Allowance | 1,266 | 513
Unpaid Principal Balance With Related Allowance | 1,266 | 532
Related Allowance | 412 | 441
Commercial and industrial | Total Acquired Loans | Other |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Related Allowance | 287 | 226
Unpaid Principal Balance With No Related Allowance | 379 | 226
Recorded Investment With Related Allowance | 0 | 50
Unpaid Principal Balance With Related Allowance | 0 | 50
Related Allowance | 0 | 25
Commercial real estate | Originated Loans and Leases | Other |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Related Allowance | 6,757 | 6,626
Unpaid Principal Balance With No Related Allowance | 6,965 | 6,533
Recorded Investment With Related Allowance | 46 | 0
Unpaid Principal Balance With Related Allowance | 57 | 0
Related Allowance | 29 | 0
Commercial real estate | Total Acquired Loans | Other |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Related Allowance | 1,257 | 1,372
Unpaid Principal Balance With No Related Allowance | 1,258 | 1,474
Recorded Investment With Related Allowance | 25 | 0
Unpaid Principal Balance With Related Allowance | 25 | 0
Related Allowance | 25 | 0
Residential real estate | Originated Loans and Leases | Home equity |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Related Allowance | 4,037 | 3,965
Unpaid Principal Balance With No Related Allowance | 4,213 | 4,049
Residential real estate | Total Acquired Loans | Home equity |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Related Allowance | 1,779 | 1,823
Unpaid Principal Balance With No Related Allowance | $ 1,809 | $ 1,854

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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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