INCOME TAXES (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax liabilities:
Core deposit intangibles	$ (20,257)	$ (24,853)
Affordable housing partnerships and other investments	(20,558)	(18,995)
Fixed assets	(21,490)	(27,945)
FHLB stock	(26,810)	(30,962)
Deferred loan fees	(3,242)	(3,885)
Purchased loan discounts	(162)	(204)
State taxes	(7,894)	(10,749)
Mortgage servicing assets	(2,329)	(3,271)
Section 597 gain	(96,915)	(146,522)
FDIC receivable	(328,146)	(380,363)
Acquired debt	(12,173)	(12,124)
Other, net	23	(5,141)
Total gross deferred tax (liabilities)	(539,953)	(665,014)
Deferred tax assets:
Allowance for loan losses and REO reserves	111,985	92,605
Deferred compensation	23,475	18,634
Purchased loan premium	624	1,063
Unrealized loss on securities	60,383	89,506
Net operating loss carryforwards	698	35,447
Acquired loans and REOs	516,578	615,855
Other, net	12,295	14,390
Total gross deferred tax assets	726,038	867,500
Valuation allowance	(372)	(603)
Net deferred tax (liabilities) assets	185,713	201,883
Federal
Deferred tax liabilities:
Core deposit intangibles	(15,755)	(19,449)
Affordable housing partnerships and other investments	(16,221)	(15,091)
Fixed assets	(17,201)	(21,640)
FHLB stock	(17,670)	(24,088)
Deferred loan fees	(2,523)	(3,041)
Purchased loan discounts	(126)	(160)
State taxes	(7,894)	(10,749)
Mortgage servicing assets	(1,812)	(2,560)
Section 597 gain	(94,231)	(142,934)
FDIC receivable	(318,741)	(371,049)
Acquired debt	(10,812)	(10,812)
Other, net	(604)	(4,155)
Total gross deferred tax (liabilities)	(503,590)	(625,728)
Deferred tax assets:
Allowance for loan losses and REO reserves	93,924	79,269
Deferred compensation	18,213	14,533
Purchased loan premium	485	832
Unrealized loss on securities	47,567	69,239
Net operating loss carryforwards		1,052
Acquired loans and REOs	478,825	577,883
Other, net	9,021	10,016
Total gross deferred tax assets	648,035	752,824
Net deferred tax (liabilities) assets	144,445	127,096
State
Deferred tax liabilities:
Core deposit intangibles	(4,635)	(5,537)
Affordable housing partnerships and other investments	(4,337)	(3,904)
Fixed assets	(4,289)	(6,305)
FHLB stock	(9,140)	(6,874)
Deferred loan fees	(719)	(844)
Purchased loan discounts	(36)	(44)
Mortgage servicing assets	(517)	(711)
Section 597 gain	(2,684)	(3,588)
FDIC receivable	(9,405)	(9,314)
Acquired debt	(1,061)	(1,012)
Other, net	627	(986)
Total gross deferred tax (liabilities)	(36,196)	(39,119)
Deferred tax assets:
Allowance for loan losses and REO reserves	23,281	18,556
Deferred compensation	5,262	4,101
Purchased loan premium	139	231
Unrealized loss on securities	12,816	20,267
Net operating loss carryforwards	698	34,395
Acquired loans and REOs	29,796	30,015
Other, net	3,177	4,277
Total gross deferred tax assets	75,169	111,842
Valuation allowance	(372)	(603)
Net deferred tax (liabilities) assets	38,601	72,120
Foreign
Deferred tax liabilities:
Core deposit intangibles	133	133
Acquired debt	(300)	(300)
Total gross deferred tax (liabilities)	(167)	(167)
Deferred tax assets:
Allowance for loan losses and REO reserves	(5,220)	(5,220)
Acquired loans and REOs	7,957	7,957
Other, net	97	97
Total gross deferred tax assets	2,834	2,834
Net deferred tax (liabilities) assets	$ 2,667	$ 2,667