CUSTOMER DEPOSIT ACCOUNTS (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Customer deposit account balances
Noninterest-bearing demand	$ 5,821,899,000	$ 4,535,877,000
Interest-bearing checking	1,749,479,000	1,230,372,000
Money market accounts	5,383,759,000	5,000,309,000
Savings deposits	1,633,433,000	1,421,182,000
Total core deposits	14,588,570,000	12,187,740,000
Time deposits:
Less than $100,000	1,678,850,000	1,884,577,000
$100,000 or greater	4,145,498,000	4,237,037,000
Total time deposits	5,824,348,000	6,121,614,000
Total deposits	20,412,918,000	18,309,354,000
Time deposits $100 thousand or greater held by the Company's foreign branch located in Hong Kong	$ 169,700,000	$ 319,300,000