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Loans and the Allowance for Loan and Lease Losses (Details) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Loans and the Allowance for Loan and Lease Losses (Details) [Line Items] |  |  |
Number of Segments of Loans and Leases | 5 |  |
Non Accrual Contractual Due | 90 years |  |
Threshold to Determine Impaired Loans | $ 250,000 |  |
Period Considered to Calculate Actual Loss | 3 years |  |
Loans Pledged as Collateral | $ 1,400,000,000 |  | $ 1,000,000,000
Financing Receivable, Collectively Evaluated for Impairment | 2,744,010,000 |  | 2,516,251,000
Commitments to Lend Additional Funds | 0 |  |
Financing Receivable, Modifications, Recorded Investment | 2,800,000 |  | 2,800,000
Loans Modified In Troubled Debt Restructuring On Non Accrual Status | $ 1,100,000 |  | 1,000,000
Financing Receivable, Modifications, Number of Contracts | 0 | 2 |
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down | $ 0 | $ 333,000 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 0 |  |
Acquired Loans [Member] |  |  |
Loans and the Allowance for Loan and Lease Losses (Details) [Line Items] |  |  |
Financing Receivable, Collectively Evaluated for Impairment | $ 1,100,000,000 |  | 1,200,000,000
Restatement Adjustment [Member] |  |  |
Loans and the Allowance for Loan and Lease Losses (Details) [Line Items] |  |  |
Financing Receivable, Collectively Evaluated for Impairment | 2,668,635,000 |  |
Financing Receivable, Modifications, Recorded Investment | 75,400,000 |  | 2,800,000
Loans Modified In Troubled Debt Restructuring On Non Accrual Status | 1,100,000 |  | $ 1,000,000
Valuation Per Medallion Amount | $ 884,000 |  |
Financing Receivable, Modifications, Number of Contracts | 47 |  |
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum | 3.00% |  |
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum | 3.25% |  |
Debt Instrument, Interest Rate, Increase (Decrease) | 3.75% |  |
Minimum [Member] | Restatement Adjustment [Member] |  |  |
Loans and the Allowance for Loan and Lease Losses (Details) [Line Items] |  |  |
Amortization Period for Interest | 25 years |  |
Maximum [Member] | Restatement Adjustment [Member] |  |  |
Loans and the Allowance for Loan and Lease Losses (Details) [Line Items] |  |  |
Amortization Period for Interest | 30 years |  |

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