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Loans and the Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015
LOANS AND THE ALLOWANCE FOR LOAN LOSSES (Details) [Line Items] |  |  |  |  |
Non Accrual Contractual Due |  | 90 days |  |  |
Loans held-for-sale, Carrying Amount |  | $ 51,124 |  | $ 78,005 |
Loans Pledged as Collateral |  | 1,800,000 |  | 1,800,000 |
Loans performing under the restructured terms |  | 10,200 | $ 97,800 | 13,300 |
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans |  | 4,900 | 1,400 | 500 |
Troubled debt restructurings |  | 15,100 | 99,200 | 13,800 |
Allowance for Loan and Lease Losses Period Increase Decrease Due to Trouble Debt Restructuring | $ 1,500 | $ 10,100 | 3,300 |  |
Valuation per Medallion Amount | 750 |  | 750 |  |
Specific allocations associated with taxi medallion, fair value | $ 7,800 |  | 7,800 |  | $ 4,500
Increase in allowance for loan and lease losses |  |  | $ 108 |  |
Number of loans |  | Eight loans were accruing prior to modification, while seven remained in accrual status post-modification. |  |  |
Commercial loans held-for-sale segment [Member] |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES (Details) [Line Items] |  |  |  |  |
Loans held-for-sale, Carrying Amount |  | $ 50,900 |  | 65,600 |
Loans held-for-sale net of valuation allowance |  | $ 12,300 |  | $ 0 |

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- Definition Loans performing under the restructured terms + References No definition available. + Details
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- Definition Number of loans. + References No definition available. + Details
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- Definition Specific allocations associated with taxi medallion, fair value. + References No definition available. + Details
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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554 + Details
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- Definition Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18794-111554 + Details
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- Definition Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5086-111524 + Details
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- Definition For a debtor, the gain (loss) recognized on the transfer of assets, after the impact of income tax expense or benefit, arising from the difference between the book value of the assets transferred before the restructuring and the fair value of the assets transferred. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 60 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6402221&loc=d3e15743-112638 + Details
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