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Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Activity Related to Troubled Debt Restructurings (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Financing Receivable, Modifications [Line Items] |  |  |  |
Total TDRs | $ 10,045 | $ 30,051 | $ 10,045 | $ 30,051
Performing TDRs [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Beginning balance | 16,574 | 20,292 | 19,233 | 42,687
New modifications | 0 | 759 | 3,143 | 1,877
Payoffs and payments, net | (10,839) | (2,584) | (13,826) | (26,097)
TDRs returned to accrual status | 0 | 8,551 | 329 | 8,551
TDRs placed on nonaccrual status | 0 | 0 | (3,144) | 0
Ending balance | 5,735 | 27,018 | 5,735 | 27,018
Nonperforming TDRs [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Beginning balance | 4,391 | 12,029 | 1,626 | 12,622
New modifications | 0 | 20 | 2,066 | 102
Charge-offs | 0 | 0 | 0 | (38)
Payoffs and payments, net | (81) | (465) | (2,197) | (1,102)
TDRs returned to accrual status | 0 | (8,551) | (329) | (8,551)
TDRs placed on nonaccrual status | 0 | 0 | 3,144 | 0
Ending balance | $ 4,310 | $ 3,033 | $ 4,310 | $ 3,033

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- Definition The decrease in performing troubled debt restructurings financing receivables, because of the change in accrual status to nonaccrual. + References No definition available. + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 + Details
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