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Loans and the Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
LOANS AND THE ALLOWANCE FOR LOAN LOSSES (Details) [Line Items] |  |  |
Loans held-for-sale | $ 24,845 | $ 78,005 |
Non Accrual Contractual Due | 90 days |  |
Loans Pledged as Collateral | $ 1,900 | 1,700 |
Charge offs | 239 | 39,573 | $ 538
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans | 5,600 | 500 |
Troubled debt restructurings | 20,500 | 13,800 | $ 85,900
Current Troubled debt restructurings | 14,900 | 13,300 |
Debt Instrument, Interest Rate, Stated Percentage Rate Range |  |  | 3.75%
Troubled debt restructurings medallions | $ 18,500 |  |
Number of loans | All 15 loans were accruing prior to modification, while 14 remained in accrual status post-modification. |  |
Total, Recorded Investment | $ 84,664 | 30,991 | $ 107,104
Commercial loans held-for-sale segment [Member] |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES (Details) [Line Items] |  |  |
Loans held-for-sale | $ 46,800 | 65,600 |
Loans held-for-sale, percentage | 1.10% |  |
Taxi medallion portfolio [Member] |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES (Details) [Line Items] |  |  |
Loans held-for-sale | $ 46,800 | 102,100 |
Loans held-for-sale, percentage | 1.10% |  |
Total, Recorded Investment | $ 46,800 |  |
Union Center operations building [Member] |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES (Details) [Line Items] |  |  |
Charge offs |  | 36,700 |
Taxi medallion loans [Member] |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES (Details) [Line Items] |  |  |
Charge offs |  | $ 1,100 |
Minimum [Member] |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES (Details) [Line Items] |  |  |
Amortization Period For Interest |  |  | 25 years
Debt Instrument, Interest Rate, Stated Percentage Rate Range |  |  | 3.00%
Maximum [Member] |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES (Details) [Line Items] |  |  |
Amortization Period For Interest |  |  | 30 years
Debt Instrument, Interest Rate, Stated Percentage Rate Range |  |  | 3.25%

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