LONG-TERM OBLIGATIONS (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended						0 Months Ended			12 Months Ended			0 Months Ended			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jul. 31, 2012	Dec. 31, 2012 Through June 30, 2011 [Member]	Dec. 31, 2012 Period From July 1, 2011 Through June 30, 2016 [Member]	Jul. 31, 2012 Preferred Securities of 1998 [Member] Securities Sold under Agreements to Repurchase [Member]	Jul. 15, 2012 Securitization and Sale of Revolving Mortgage Loans in 2005 [Member] Secured Debt [Member]	Jul. 31, 2012 Junior Subordinated Debt [Member] Junior Subordinated Debenture at 8.05% Maturing March 5, 2028 [Member]	Dec. 31, 2012 Junior Subordinated Debt [Member] Junior Subordinated Debenture at 8.05% Maturing March 5, 2028 [Member]	Dec. 31, 2011 Junior Subordinated Debt [Member] Junior Subordinated Debenture at 8.05% Maturing March 5, 2028 [Member]	Jul. 31, 2012 Junior Subordinated Debt [Member] Junior Subordinated Debenture at 8.05% Maturing March 5, 2028 [Member] Securities Sold under Agreements to Repurchase [Member]	Jul. 31, 2012 Junior Subordinated Debt [Member] Junior Subordinated Debenture at 8.05% Maturing March 5, 2028 [Member] Secured Debt [Member]	Dec. 31, 2012 Junior Subordinated Debt [Member] Junior Subordinanted Debenture at 3 Month Libor Plus 1.75% Maturing June 30, 2036 [Member]	Dec. 31, 2011 Junior Subordinated Debt [Member] Junior Subordinanted Debenture at 3 Month Libor Plus 1.75% Maturing June 30, 2036 [Member]	Dec. 31, 2012 Junior Subordinated Debt [Member] Junior Subordinanted Debenture at 3 Month Libor Plus 1.75% Maturing June 30, 2036 [Member] 3-month LIBOR [Member]	Dec. 31, 2006 Junior Subordinated Debt [Member] Preferred Securities of 2006 [Member]	Dec. 31, 2012 Junior Subordinated Debt [Member] Preferred Securities of 2006 [Member] 3-month LIBOR [Member]	Dec. 31, 2012 Junior Subordinated Debt [Member] Debenture of 2006 [Member] 3-month LIBOR [Member]	Dec. 31, 2012 Subordinated Debt [Member] Subordinated Notes Payable at 5.125% Maturing June 1, 2015 [Member]	Dec. 31, 2011 Subordinated Debt [Member] Subordinated Notes Payable at 5.125% Maturing June 1, 2015 [Member]	Dec. 31, 2012 Capital Lease Obligations [Member]	Dec. 31, 2011 Capital Lease Obligations [Member]	Dec. 31, 2012 Federal Home Loan Bank Advances [Member] Rates Ranging from 2.00% to 3.88% and Maturing Through September 2018 [Member]	Dec. 31, 2011 Federal Home Loan Bank Advances [Member] Rates Ranging from 2.00% to 3.88% and Maturing Through September 2018 [Member]	Dec. 31, 2012 Federal Home Loan Bank Advances [Member] Rates Ranging from 2.00% to 3.88% and Maturing Through September 2018 [Member] Minimum [Member]	Dec. 31, 2012 Federal Home Loan Bank Advances [Member] Rates Ranging from 2.00% to 3.88% and Maturing Through September 2018 [Member] Maximum [Member]	Dec. 31, 2012 Federal Home Loan Bank Advances [Member] Rates Ranging from 4.74% and Maturity of July 2017 [Member]	Dec. 31, 2011 Federal Home Loan Bank Advances [Member] Rates Ranging from 4.74% and Maturity of July 2017 [Member]	Dec. 31, 2012 Collateralized Mortgage Backed Securities [Member]	Dec. 31, 2011 Collateralized Mortgage Backed Securities [Member]	Dec. 31, 2012 Unamortized Acquisition Accounting Adjustments [Member]	Dec. 31, 2011 Unamortized Acquisition Accounting Adjustments [Member]	Dec. 31, 2012 Other Long Term Debt [Member]	Dec. 31, 2011 Other Long Term Debt [Member]
Debt Instrument [Line Items]
Debt interest rate										8.05%	8.05%										5.125%						2.00%	3.88%	4.74%
Description of variable rate basis																	3-month LIBOR
Basis spread on variable rate																	1.75%		1.75%	1.75%
Liquidation preference								$ 150,000
Proceeds from Issuance of Trust Preferred Securities																		115,000
Redemption of debt								158,661		163,569
Redemption rate, face value plus accrued interest													102.42%
Prepayment penalty rate					2.42%
Noninterest expense		766,933	792,925	733,376							3,630
Trust Preferred Securities Redeemed	21,500
Debt interest rate converted to by interest rate swaps						7.125%	5.50%
Reduction in long-term borrowings from repayments of debt									21,565					154,640
Long-term Debt, Fiscal Year Maturity [Abstract]
2013		3,690
2014		3,527
2015		206,306
2016		620
2017		10,504
Thereafter		220,274
Total long-term obligations	$ 687,599	$ 444,921	$ 687,599							$ 154,640	$ 0	$ 154,640			$ 96,392	$ 96,392					$ 125,000	$ 125,000	$ 10,020	$ 5,688	$ 170,299	$ 225,000			$ 10,000	$ 10,000	$ 0	$ 35,645	$ 3,069	$ 4,420	$ 30,141	$ 30,814