LOANS AND LEASES (Details 4) (USD $)	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011	May 31, 2013 FCAL	Sep. 30, 2013 Real estate mortgage	Dec. 31, 2012 Real estate mortgage	Sep. 30, 2012 Real estate mortgage	Sep. 30, 2013 Real estate construction	Dec. 31, 2012 Real estate construction	Sep. 30, 2012 Real estate construction	Sep. 30, 2013 Commercial	Dec. 31, 2012 Commercial	Sep. 30, 2013 Leases	Dec. 31, 2012 Leases	Sep. 30, 2013 Consumer	Dec. 31, 2012 Consumer	Sep. 30, 2013 Foreign	Dec. 31, 2012 Foreign	Sep. 30, 2013 Non-PCI Loans	Jun. 30, 2013 Non-PCI Loans	Dec. 31, 2012 Non-PCI Loans	Sep. 30, 2012 Non-PCI Loans	Jun. 30, 2012 Non-PCI Loans	Dec. 31, 2011 Non-PCI Loans	May 31, 2013 Non-PCI Loans FCAL	Sep. 30, 2013 Non-PCI Loans Real estate mortgage	Jun. 30, 2013 Non-PCI Loans Real estate mortgage	Dec. 31, 2012 Non-PCI Loans Real estate mortgage	Sep. 30, 2012 Non-PCI Loans Real estate mortgage	Jun. 30, 2012 Non-PCI Loans Real estate mortgage	Dec. 31, 2011 Non-PCI Loans Real estate mortgage	Sep. 30, 2013 Non-PCI Loans Real estate construction	Jun. 30, 2013 Non-PCI Loans Real estate construction	Dec. 31, 2012 Non-PCI Loans Real estate construction	Sep. 30, 2012 Non-PCI Loans Real estate construction	Jun. 30, 2012 Non-PCI Loans Real estate construction	Dec. 31, 2011 Non-PCI Loans Real estate construction	Sep. 30, 2013 Non-PCI Loans Commercial	Jun. 30, 2013 Non-PCI Loans Commercial	Dec. 31, 2012 Non-PCI Loans Commercial	Sep. 30, 2012 Non-PCI Loans Commercial	Jun. 30, 2012 Non-PCI Loans Commercial	Dec. 31, 2011 Non-PCI Loans Commercial	Sep. 30, 2013 Non-PCI Loans Leases	Jun. 30, 2013 Non-PCI Loans Leases	Dec. 31, 2012 Non-PCI Loans Leases	Sep. 30, 2012 Non-PCI Loans Leases	Jun. 30, 2012 Non-PCI Loans Leases	Sep. 30, 2013 Non-PCI Loans Consumer	Jun. 30, 2013 Non-PCI Loans Consumer	Dec. 31, 2012 Non-PCI Loans Consumer	Sep. 30, 2012 Non-PCI Loans Consumer	Jun. 30, 2012 Non-PCI Loans Consumer	Dec. 31, 2011 Non-PCI Loans Consumer	Sep. 30, 2013 Non-PCI Loans Foreign	Jun. 30, 2013 Non-PCI Loans Foreign	Dec. 31, 2012 Non-PCI Loans Foreign	Sep. 30, 2012 Non-PCI Loans Foreign	Jun. 30, 2012 Non-PCI Loans Foreign	Dec. 31, 2011 Non-PCI Loans Foreign	Sep. 30, 2013 PCI Loans	Jun. 30, 2013 PCI Loans	Dec. 31, 2012 PCI Loans	Sep. 30, 2012 PCI Loans	Jun. 30, 2012 PCI Loans	Dec. 31, 2011 PCI Loans	Sep. 30, 2013 PCI Loans Real estate mortgage	Dec. 31, 2012 PCI Loans Real estate mortgage	Sep. 30, 2013 PCI Loans Real estate construction	Dec. 31, 2012 PCI Loans Real estate construction	Sep. 30, 2013 PCI Loans Commercial	Dec. 31, 2012 PCI Loans Commercial	Sep. 30, 2013 PCI Loans Consumer	Dec. 31, 2012 PCI Loans Consumer
Composition of loans and leases
Total gross loans and leases	$ 4,384,312,000		$ 3,592,832,000	$ 3,651,181,000				$ 2,971,381,000	$ 2,422,570,000	$ 1,950,777,000	$ 201,524,000	$ 154,604,000	$ 152,748,000	$ 929,434,000	$ 800,959,000	$ 235,791,000	$ 174,373,000	$ 34,153,000	$ 23,085,000	$ 12,029,000	$ 17,241,000	$ 3,951,555,000		$ 3,074,947,000	$ 3,080,068,000				$ 2,551,781,000		$ 1,938,513,000	$ 1,950,777,000			$ 189,957,000		$ 129,959,000	$ 152,748,000			$ 928,169,000		$ 791,888,000	$ 777,365,000			$ 235,791,000		$ 174,373,000	$ 161,934,000		$ 33,828,000		$ 22,973,000	$ 21,118,000			$ 12,029,000		$ 17,241,000	$ 16,126,000			$ 432,757,000		$ 517,885,000	$ 571,113,000			$ 419,600,000	$ 484,057,000	$ 11,567,000	$ 24,645,000	$ 1,265,000	$ 9,071,000	$ 325,000	$ 112,000
Unearned income	(919,000)		(2,535,000)																			(919,000)		(2,535,000)
Total allowance for loans and lease losses	(83,786,000)	(90,643,000)	(91,968,000)	(99,846,000)	(103,524,000)	(116,588,000)																(60,551,000)	(63,246,000)	(65,899,000)	(69,142,000)	(72,061,000)	(85,313,000)		(29,606,000)	(31,804,000)	(38,700,000)	(38,737,000)	(42,236,000)	(50,205,000)	(3,545,000)	(3,432,000)	(3,221,000)	(6,597,000)	(5,496,000)	(8,697,000)	(23,069,000)	(24,165,000)	(20,661,000)	(21,020,000)	(21,979,000)	(23,308,000)	(2,336,000)	(2,096,000)	(1,493,000)	(1,127,000)	(498,000)	(1,939,000)	(1,667,000)	(1,726,000)	(1,554,000)	(1,735,000)	(2,768,000)	(56,000)	(82,000)	(98,000)	(107,000)	(117,000)	(335,000)	(23,235,000)	(27,397,000)	(26,069,000)	(30,704,000)	(31,463,000)	(31,275,000)
Total loans and leases, net	4,299,607,000		3,498,329,000	3,549,145,000																		3,890,085,000		3,006,513,000																																								409,522,000		491,816,000
Total gross loans and leases (as a percent)																						100.00%		100.00%					65.00%		63.00%				5.00%		4.00%				23.00%		25.00%				6.00%		6.00%			1.00%		1.00%						1.00%				100.00%		100.00%				97.00%	93.00%	3.00%	5.00%		2.00%
Fair Value of loans aquired							(44,146,000)																					1,000,000,000
Gross contractual amount							84,817,000																					1,300,000,000
Estimated contractual flows not expected																												$ 34,400,000