COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Credit Extensions
Loan commitments	$ 4,688,223		$ 3,370,271
Commercial letters of credit and SBLCs	1,527,366		1,293,547
Allowance for unfunded credit reserves	255,812		264,959
Unfunded Lending Commitments
Credit Extensions
Allowance for unfunded credit reserves	18,329	$ 20,318	20,360	$ 19,043	$ 19,741	$ 12,712
Unfunded Lending Commitments | Accrued Expenses and Other Liabilities
Credit Extensions
Allowance for unfunded credit reserves	17,900		$ 19,800
Commercial Letters Of Credit
Credit Extensions
Commercial letters of credit and SBLCs	45,100
Standby Letters of Credit
Credit Extensions
Commercial letters of credit and SBLCs	$ 1,480,000