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Loans and Allowance for Loan Losses - Changes in Accretable Yield and Nonaccretable Difference of Purchased Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Accretable yield, Beginning balance |  |  | $ (2,444) |
Accretable yield, Accretion |  |  | 848 | $ 2,381
Accretable yield, Ending balance | $ (1,845) |  | (1,845) |
Nonaccretable difference, Beginning balance |  |  | (4,459) |
Nonaccretable difference, Ending balance | (3,464) |  | (3,464) |
Beginning balance | (7,001) | $ (10,887) | (8,143) | (12,223)
Charge-offs |  | 32 | 5 | 472
Recoveries |  |  | (23) |
Sale of credit card portfolio |  |  |  | 70
Accretion | 848 | 1,555 | 2,008 | 2,381
Ending balance | (6,153) | (9,300) | (6,153) | (9,300)
Purchased Credit Impaired |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Accretable yield, Beginning balance | (2,142) | (1,460) | (2,444) | (1,637)
Accretable yield, Principal reductions/ pay-offs | (292) | (1,227) | (990) | (1,458)
Accretable yield, Recoveries |  |  | (23) |
Accretable yield, Accretion | 589 | 1,439 | 1,612 | 1,847
Accretable yield, Ending balance | (1,845) | (1,248) | (1,845) | (1,248)
Nonaccretable difference, Beginning balance | (3,756) | (7,698) | (4,459) | (8,369)
Nonaccretable difference, Principal reductions/ pay-offs | 292 | 1,227 | 990 | 1,458
Nonaccretable difference, Charge-offs |  | 32 | 5 | 472
Nonaccretable difference, Ending balance | (3,464) | (6,439) | (3,464) | (6,439)
Purchased Non-impaired |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Accretable yield, Beginning balance | (1,103) | (1,729) | (1,240) | (2,147)
Accretable yield, Accretion | 259 | 116 | 396 | 534
Accretable yield, Ending balance | $ (844) | $ (1,613) | $ (844) | (1,613)
Nonaccretable difference, Beginning balance |  |  |  | (70)
Nonaccretable difference, Sale of credit card portfolio |  |  |  | $ 70

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- Definition Certain loans acquired in transfer not accounted for as debt securities accretable yield and nonaccretable difference accretion. + References No definition available. + Details
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- Definition certain loans acquired in transfer not accounted for as debt securities accretable yield principal repayment. + References No definition available. + Details
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- Definition Certain loans acquired in transfer not accounted for as debt securities nonaccretable difference disposals of loans. + References No definition available. + Details
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- Definition The amount of the loan's contractually required payments receivable in excess of the amount of its cash flows expected to be collected. This relates to loans with deteriorating 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. + References No definition available. + Details
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- Definition Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 + Details
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- Definition Amount of accretion recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 + Details
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