INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred tax assets:
Federal net operating loss carryforwards	$ 200,139	$ 209,190
State net operating loss carryforwards	66,578	65,882
Allowance for loan losses	35,354	37,825
Loans held for sale	2,341	2,032
Alternative minimum and general business tax credits	20,830	19,146
Interest on nonaccrual loans	9,078	12,551
Deferred compensation	4,070	3,573
Core deposit intangibles	2,493	2,706
Partnership and corporate investments	5,945	7,908
Deferred loan charge-offs and other fraud losses	1,426	4,341
Other real estate and repossessed assets	15,893	22,666
Accrued contingent liabilities	1,908	2,870
Depreciation on bank premises and equipment	0	1,202
State taxes	(19,325)	682
Other	12,531	12,692
Gross deferred tax assets	359,261	405,266
Valuation allowance	(43,380)	(376,224)	(391,629)	(370,125)
Deferred tax assets, net of valuation allowance	315,881	29,042
Deferred tax liabilities:
Servicing rights	4,655	2,632
Net fair value adjustment for available-for-sale investment securities	1,055	21,214
Deferred gain on reclassification of investment securities from available for sale to held to maturity	4,988	4,265
Equity investments	5,683	5,364
Thrift base year tax bad debt reserve	10,605	0
Net deferred loan fees	1,870	1,903
Depreciation on bank premises and equipment	(1,561)	0
Other	1,102	804
Deferred tax liabilities	28,397	36,182
Net deferred tax assets (liabilities)	$ 287,484	$ (7,140)