Loans and Leases - Schedule of Changes in Carrying Value of PCI Loans (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Carrying Amount | |||
| Balance at beginning of period | $ 3,812,340 | ||
| Balance at end of period | 4,273,415 | $ 3,812,340 | |
| PCI Loans [Member] | |||
| Carrying Amount | |||
| Balance at beginning of period | 8,892 | 14,573 | $ 43,475 |
| Accretion | 602 | 1,144 | 2,956 |
| Payments received | (2,827) | (7,138) | (31,215) |
| Disposal/transfers to OREO | (110) | (977) | (3,772) |
| Change in expected cash flows, net | 0 | 0 | 0 |
| Provision for credit losses | 651 | (664) | (4,415) |
| Balance at end of period | 7,428 | 8,892 | 14,573 |
| Accretable Yield | |||
| Balance at beginning of period | (5,677) | (5,944) | (11,025) |
| Accretion | 602 | 1,144 | 2,956 |
| Payments received | 0 | 0 | 0 |
| Disposal/transfers to OREO | 0 | 0 | 0 |
| Change in expected cash flows, net | (410) | (877) | 2,125 |
| Provision for credit losses | 0 | 0 | 0 |
| Balance at end of period | $ (5,485) | $ (5,677) | $ (5,944) |
| X | ||||||||||
- Definition Loans And Leases Receivable, Accretion No definition available.
|
| X | ||||||||||
- Definition Loans And Leases Receivable Collections No definition available.
|
| X | ||||||||||
- Definition Loans And Leases Receivable Estimated Cash Flows Increase (Decrease) No definition available.
|
| X | ||||||||||
- Definition Loans And Leases Receivable, Sold No definition available.
|
| X | ||||||||||
- Definition Loans and Leases Receivable, Gross, Carrying Amount [Roll Forward] No definition available.
|
| X | ||||||||||
- Definition The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan for loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Current period recognition due to accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan for loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Sale or transfer of a loan during the period resulting in a reduction in the excess of a loan's cash flows expected to be collected over the investor's initial investment. This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Amount of increase (decrease) of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans accounted for as debt securities, with evidence of deterioration of credit quality. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Change in the estimate of cash flows expected to be collected, after acquisition of a loan, which results in an increase in accretable yield (for example, if actual cash flows are significantly greater than previously expected). This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of expense to write-down the amortized cost basis of loans, after acquisition, to fair value when the decline in the fair value is determined to be other than temporary (OTTI) for loans accounted for as debt securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of expense related to estimated loss from loan and lease transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|