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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | --- | --- | ---
Credit Extensions |  |  |  |  |  |
Allowance for unfunded credit reserves | $ 266,768 |  | $ 264,959 |  |  |
Unfunded Lending Commitments |  |  |  |  |  |
Credit Extensions |  |  |  |  |  |
Allowance for unfunded credit reserves | 20,318 | $ 21,414 | 20,360 | $ 19,741 | $ 15,632 | $ 12,712
Unfunded Lending Commitments | Accrued Expenses and Other Liabilities |  |  |  |  |  |
Credit Extensions |  |  |  |  |  |
Allowance for unfunded credit reserves | 19,800 |  | 19,800 |  |  |
Undisbursed Loan Commitments |  |  |  |  |  |
Credit Extensions |  |  |  |  |  |
Loan commitments | 4,758,116 |  | 3,370,271 |  |  |
Commercial and Standby Letters of Credit |  |  |  |  |  |
Credit Extensions |  |  |  |  |  |
Commercial and SBLCs | 1,447,447 |  | $ 1,293,547 |  |  |
Commercial Letters Of Credit |  |  |  |  |  |
Credit Extensions |  |  |  |  |  |
Commercial and SBLCs | 43,700 |  |  |  |  |
Standby Letters of Credit |  |  |  |  |  |
Credit Extensions |  |  |  |  |  |
Commercial and SBLCs | $ 1,400,000 |  |  |  |  |

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