FAIR VALUE MEASUREMENTS (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets
Pledged securities	$ 34,581	$ 33,481
Derivative assets	8,306	21,258
Liabilities
Derivative liabilities	3,936	867
Recurring basis | Quoted Prices in Active Markets For Identical Assets (Level 1)
Assets
Pledged securities	34,581	33,481
Total financial assets	34,581	33,481
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets
Loans held for sale	479,779	1,101,561
Total financial assets	479,779	1,101,561
Recurring basis | Significant Other Unobservable Inputs (Level 3)
Assets
Derivative assets	8,306	21,258
Total financial assets	8,306	21,258
Liabilities
Derivative liabilities	3,936	867
Total financial liabilities	3,936	867
Recurring basis | Balance as of Period End
Assets
Loans held for sale	479,779	1,101,561
Pledged securities	34,581	33,481
Derivative assets	8,306	21,258
Total financial assets	522,666	1,156,300
Liabilities
Derivative liabilities	3,936	867
Total financial liabilities	$ 3,936	$ 867