FAIR VALUE MEASUREMENTS (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Fair Value Adjustment Components
Assumed Gain (Loss) on Sale	$ 15,140	$ 44,214
Total Fair Value Adjustment	15,140	44,214
Balance Sheet Location
Derivative Assets	8,306	21,258
Derivative Liabilities	(3,936)	(867)
Fair Value Adjustment To Loans Held for Sale	10,666	23,699
Loans held for sale
Fair Value Adjustment Components
Notional or Principal Amount	469,113	1,077,862
Assumed Gain (Loss) on Sale	8,842	32,261
Interest Rate Movement Effect	1,824	(8,562)
Total Fair Value Adjustment	10,666	23,699
Balance Sheet Location
Fair Value Adjustment To Loans Held for Sale	10,666	23,699
Rate lock commitments
Fair Value Adjustment Components
Notional or Principal Amount	168,130	302,373
Assumed Gain (Loss) on Sale	6,298	11,953
Interest Rate Movement Effect	1,635	(1,194)
Total Fair Value Adjustment	7,933	10,759
Balance Sheet Location
Derivative Assets	7,933	10,759
Forward sale contracts
Fair Value Adjustment Components
Notional or Principal Amount	637,243	1,380,235
Interest Rate Movement Effect	(3,459)	9,756
Total Fair Value Adjustment	(3,459)	9,756
Balance Sheet Location
Derivative Assets	373	10,499
Derivative Liabilities	$ (3,936)	$ (867)