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Loans - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and Leases Receivable, Deferred Income | $ 10,400,000 | $ 9,400,000 |
Deposit Liabilities Reclassified as Loans Receivable | 1,700,000 | 2,300,000 |
Troubled Debt Restructuring, Classification removed | 1,200,000 | 2,500,000 |
Partial charge-offs on impaired loans | 28,705,000 | 32,480,000 |
Allowance for loans individually evaluated for impairment | 4,191,000 | 3,660,000 |
Recorded investment, related to loans | 19,900,000 | 9,300,000 |
Loans 90 days past due and still accruing | 1,975,000 | 2,709,000 |
TDRs included in nonaccrual loan totals | 41,100,000 | 47,500,000 |
Nonaccrual TDRs considered current | 19,100,000 | 15,700,000 |
TDRs included in accruing loan totals | 25,100,000 | 16,300,000 |
Commitments to lend additional funds to borrowers whose terms had been modified in a TDR | 2,300,000 | 1,400,000 |
Specific reserves related to troubled debt restructuring | 2,300,000 | 2,400,000 |
Additional specific reserves related to troubled debt restructuring | 1,300,000 | 700,000 | $ 1,100,000
Modified substandard commercial loans, total recorded investment | 116,000 | 987,000 |
Modified substandard consumer loans total recorded investment | 16,500,000 | 19,900,000 |
Nonaccrual loans not classified as TDRs at prior fiscal year end | 800,000 | 700,000 | 5,500,000
Recorded investment modified as TDRs | 2,854,000 | 2,009,000 | 7,379,000
Consumer |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Allowance for loans individually evaluated for impairment | 0 | 0 |
Loans 90 days past due and still accruing | 1,093,000 | 1,133,000 |
Executive officers and directors |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans due from related party | 47,000,000 | 45,700,000 |
New loan made to related party | 5,800,000 | 6,000,000 |
Repayment of loans due from related party | 12,900,000 | 14,100,000 |
Increase (Decrease) in Customer Advances | 7,100,000 | 6,400,000 |
Accruing |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Recorded investment modified as TDRs | 44,000 | 314,000 | 397,000
Nonaccrual |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Recorded investment modified as TDRs | 2,800,000 | 1,700,000 | $ 7,000,000
Financing Receivable With No Related Allowance Recorded [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Partial charge-offs on impaired loans | 24,200,000 | 32,400,000 |
Financing Receivable With Related Allowance Recorded [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Partial charge-offs on impaired loans | 4,500,000 | $ 0 |
Loans receivable | Executive officers and directors |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans due from related party | $ 36,000,000 |  |

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