SUBORDINATED DEBENTURES (Textual) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 installment trust	Dec. 31, 2011	Dec. 31, 2010	Jan. 26, 2011	Aug. 10, 2009
Subordinated Borrowings [Abstract]
Number of trusts created for issuing trust preferred securities	13
Percent of principal amount callable at call date	100.00%
Distributions accrued on junior subordinated debentures	$ 14,800,000	$ 13,500,000	$ 12,900,000
Trust preferred securities value					345,000,000
Number of quarterly periods for deferral of cash interest payments on junior subordinated debt	14
Statement [Line Items]
Individual ownership percentage				100.00%
Cummulative trust preferred securities, percentage				8.15%
Regularly Scheduled Deferred Interest Payments Accrued
Statement [Line Items]
Interest payable	43,800,000	31,000,000
Additional Deferred Interest Payments Accrued
Statement [Line Items]
Interest payable	$ 3,900,000	$ 1,900,000