CUSTOMER DEPOSITS (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Core deposits:
Noninterest-bearing demand	$ 10,183,946	$ 8,656,805
Interest-bearing checking	3,674,417	3,336,293
Money market	8,174,854	6,932,962
Savings	2,242,497	1,933,026
Total core deposits	24,275,714	20,859,086
Time deposits:
Less than $100,000	1,300,091	1,570,353
$100,000 or greater	4,315,178	5,046,542
Total time deposits	5,615,269	6,616,895
Total deposits	29,890,983	27,475,981
Time Deposits [Line Items]
Amounts in excess of FDIC insurance limit	2,350,000	3,030,000
Hong Kong and China
Time Deposits [Line Items]
Amounts in excess of FDIC insurance limit	538,000	444,100
Hong Kong
Time Deposits [Line Items]
Time deposits $100 thousand or greater held by the Company's foreign banking offices	219,700	191,000
China
Time Deposits [Line Items]
Time deposits $100 thousand or greater held by the Company's foreign banking offices	$ 329,900	$ 267,000