BUSINESS SEGMENTS (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 item	Sep. 30, 2012	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Business segments
Number of reportable segments				3
Loans and leases, net of unearned income	$ 4,383,393,000		$ 3,648,991,000	$ 4,383,393,000	$ 3,648,991,000	$ 3,590,297,000
Total allowance for loans and lease losses	(83,786,000)	(90,643,000)	(99,846,000)	(83,786,000)	(99,846,000)	(91,968,000)	(103,524,000)	(116,588,000)
Total loans and leases, net	4,299,607,000		3,549,145,000	4,299,607,000	3,549,145,000	3,498,329,000
Goodwill	215,862,000		79,592,000	215,862,000	79,592,000	79,866,000
Core deposit and customer relationship intangibles, net	18,678,000		15,899,000	18,678,000	15,899,000	14,723,000
Total assets	6,616,855,000		5,538,502,000	6,616,855,000	5,538,502,000	5,463,658,000
Total deposits	5,433,144,000		4,787,348,000	5,433,144,000	4,787,348,000	4,709,121,000
Interest income	85,158,000	71,631,000	75,123,000	226,058,000	222,413,000
Other interest expense	(2,869,000)	(3,158,000)	(4,352,000)	(9,603,000)	(15,549,000)
Net interest income	82,289,000	68,473,000	70,771,000	216,455,000	206,864,000
Negative provision (provision) for credit losses	4,167,000	1,842,000	2,141,000	2,872,000	8,486,000
Noninterest income	5,127,000	203,000	5,682,000	8,170,000	13,815,000
Intangible asset amortization	(1,512,000)	(1,284,000)	(1,678,000)	(3,972,000)	(5,150,000)
Acquisition and integration costs	(5,450,000)	(17,997,000)	(2,101,000)	(24,139,000)	(2,997,000)
Debt termination expense					(22,598,000)
Other noninterest expense	(49,238,000)	(44,935,000)	(47,878,000)	(136,488,000)	(137,392,000)
Total noninterest expense	(56,200,000)	(64,216,000)	(51,657,000)	(164,599,000)	(168,137,000)
Earnings from continuing operations before income taxes	35,383,000	6,302,000	26,937,000	62,898,000	61,028,000
Income taxes (expense) benefit	(11,243,000)	(1,906,000)	(10,849,000)	(20,868,000)	(24,119,000)
Net earnings from continuing operations	24,140,000	4,396,000	16,088,000	42,030,000	36,909,000
Earnings (loss) from discontinued operations before income taxes	39,000	(81,000)		(42,000)
Income tax (expense) benefit	(16,000)	34,000		18,000
Net earnings (loss) from discontinued operations	23,000	(47,000)		(24,000)
Net earnings	24,163,000	4,349,000	16,088,000	42,006,000	36,909,000
Banking
Business segments
Loans and leases, net of unearned income	3,912,885,000		3,259,571,000	3,912,885,000	3,259,571,000
Total allowance for loans and lease losses	(76,496,000)		(95,878,000)	(76,496,000)	(95,878,000)
Total loans and leases, net	3,836,389,000		3,163,693,000	3,836,389,000	3,163,693,000
Goodwill	190,184,000		54,704,000	190,184,000	54,704,000
Core deposit and customer relationship intangibles, net	16,604,000		13,194,000	16,604,000	13,194,000
Total assets	6,100,587,000		5,080,308,000	6,100,587,000	5,080,308,000
Total deposits	5,467,568,000		4,800,852,000	5,467,568,000	4,800,852,000
Other interest expense	(1,692,000)	(2,080,000)	(3,287,000)	(6,422,000)	(12,002,000)
Net interest income	71,534,000	57,701,000	59,525,000	183,963,000	179,491,000
Negative provision (provision) for credit losses	5,782,000	2,607,000	3,325,000	6,053,000	9,770,000
Noninterest income	(1,566,000)	(415,000)	5,191,000	292,000	11,382,000
Intangible asset amortization	(1,354,000)	(1,127,000)	(1,544,000)	(3,474,000)	(4,855,000)
Acquisition and integration costs	(5,190,000)	(17,997,000)	(2,101,000)	(23,879,000)	(2,951,000)
Debt termination expense					(24,195,000)
Other noninterest expense	(42,015,000)	(37,557,000)	(40,776,000)	(114,418,000)	(116,366,000)
Total noninterest expense	(48,559,000)	(56,681,000)	(44,421,000)	(141,771,000)	(148,367,000)
Earnings from continuing operations before income taxes	27,191,000	3,212,000	23,620,000	48,537,000	52,276,000
Income taxes (expense) benefit	(9,996,000)	(612,000)	(9,491,000)	(17,038,000)	(20,412,000)
Net earnings from continuing operations	17,195,000	2,600,000		31,499,000
Earnings (loss) from discontinued operations before income taxes	39,000	(81,000)		(42,000)
Income tax (expense) benefit	(16,000)	34,000		18,000
Net earnings (loss) from discontinued operations	23,000	(47,000)		(24,000)
Net earnings	17,218,000	2,553,000	14,129,000	31,475,000	31,864,000
Asset Financing
Business segments
Loans and leases, net of unearned income	470,508,000		389,420,000	470,508,000	389,420,000
Total allowance for loans and lease losses	(7,290,000)		(3,968,000)	(7,290,000)	(3,968,000)
Total loans and leases, net	463,218,000		385,452,000	463,218,000	385,452,000
Goodwill	25,678,000		24,888,000	25,678,000	24,888,000
Core deposit and customer relationship intangibles, net	2,074,000		2,705,000	2,074,000	2,705,000
Total assets	507,339,000		440,690,000	507,339,000	440,690,000
Other interest expense	(108,000)	(196,000)	(215,000)	(447,000)	(658,000)
Net interest income	11,824,000	11,654,000	12,096,000	35,226,000	30,262,000
Negative provision (provision) for credit losses	(1,615,000)	(765,000)	(1,184,000)	(3,181,000)	(1,284,000)
Noninterest income	1,443,000	592,000	466,000	2,579,000	2,345,000
Intangible asset amortization	(158,000)	(157,000)	(134,000)	(498,000)	(295,000)
Acquisition and integration costs					(46,000)
Other noninterest expense	(5,822,000)	(5,980,000)	(5,706,000)	(17,855,000)	(16,916,000)
Total noninterest expense	(5,980,000)	(6,137,000)	(5,840,000)	(18,353,000)	(17,257,000)
Earnings from continuing operations before income taxes	5,672,000	5,344,000	5,538,000	16,271,000	14,066,000
Income taxes (expense) benefit	(2,378,000)	(2,237,000)	(2,291,000)	(6,814,000)	(5,941,000)
Net earnings from continuing operations	3,294,000	3,107,000		9,457,000
Net earnings	3,294,000	3,107,000	3,247,000	9,457,000	8,125,000
Other
Business segments
Total assets	8,929,000		17,504,000	8,929,000	17,504,000
Total deposits	(34,424,000)		(13,504,000)	(34,424,000)	(13,504,000)
Other interest expense	(1,069,000)	(882,000)	(850,000)	(2,734,000)	(2,889,000)
Net interest income	(1,069,000)	(882,000)	(850,000)	(2,734,000)	(2,889,000)
Noninterest income	5,250,000	26,000	25,000	5,299,000	88,000
Acquisition and integration costs	(260,000)			(260,000)
Debt termination expense					1,597,000
Other noninterest expense	(1,401,000)	(1,398,000)	(1,396,000)	(4,215,000)	(4,110,000)
Total noninterest expense	(1,661,000)	(1,398,000)	(1,396,000)	(4,475,000)	(2,513,000)
Earnings from continuing operations before income taxes	2,520,000	(2,254,000)	(2,221,000)	(1,910,000)	(5,314,000)
Income taxes (expense) benefit	1,131,000	943,000	933,000	2,984,000	2,234,000
Net earnings from continuing operations	3,651,000	(1,311,000)		1,074,000
Net earnings	3,651,000	(1,311,000)	(1,288,000)	1,074,000	(3,080,000)
Operating segment
Business segments
Interest income	85,158,000	71,631,000	75,123,000	226,058,000	222,413,000
Operating segment | Banking
Business segments
Interest income	72,873,000	59,321,000	62,358,000	189,101,000	189,886,000
Operating segment | Asset Financing
Business segments
Interest income	12,285,000	12,310,000	12,765,000	36,957,000	32,527,000
Intersegment | Banking
Business segments
Net interest income	353,000	460,000	454,000	1,284,000	1,607,000
Intersegment | Asset Financing
Business segments
Net interest income	$ (353,000)	$ (460,000)	$ (454,000)	$ (1,284,000)	$ (1,607,000)