Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
INTEREST INCOME
Interest and fees on non-covered loans	$ 78,090		$ 81,041		$ 233,386		$ 239,095
Interest and fees on covered loans	20,325		20,950		54,603		64,723
Interest and dividends on investment securities:
Taxable	13,057		21,932		47,712		68,323
Exempt from federal income tax	2,302		2,136		6,870		6,479
Dividends	3		2		37		9
Interest on temporary investments and interest bearing deposits	331		466		736		1,207
Total interest income	114,108		126,527		343,344		379,836
INTEREST EXPENSE
Interest on deposits	7,623		14,579		24,637		44,943
Interest on securities sold under agreement to repurchase and federal funds purchased	73		152		232		405
Interest on term debt	2,335		2,332		6,944		6,922
Interest on junior subordinated debentures	2,037		1,930		6,124		5,769
Total interest expense	12,068		18,993		37,937		58,039
Net interest income	102,040		107,534		305,407		321,797
PROVISION FOR NON-COVERED LOAN AND LEASE LOSSES	7,078		9,089		16,883		39,578
PROVISION FOR COVERED LOAN AND LEASE LOSSES	2,927		4,420		4,302		15,443
Net interest income after provision for loan and lease losses	92,035		94,025		284,222		266,776
NON-INTEREST INCOME
Service charges on deposit accounts	7,122		8,849		20,978		25,210
Brokerage commissions and fees	3,186		3,115		9,662		9,768
Mortgage banking revenue, net	24,346		7,084		53,069		17,166
Gain on investment securities, net:
Gain on sale of investment securities, net	21		1,813		1,199		7,491
Total other-than-temporary impairment losses							(110)
Portion of other-than-temporary impairment losses transferred from other comprehensive income							38
Total gain on investment securities, net	21		1,813		1,199		7,419
Loss on junior subordinated debentures carried at fair value	(554)		(554)		(1,649)		(1,643)
Change in FDIC indemnification asset	(4,759)		1,611		(10,644)		(1,035)
Other income	4,317		2,860		17,227		9,105
Total non-interest income	33,679		24,778		89,842		65,990
NON-INTEREST EXPENSE
Salaries and employee benefits	49,543		45,023		146,615		133,441
Net occupancy and equipment	13,441		12,803		40,519		37,867
Communications	2,740		2,791		8,527		8,397
Marketing	1,104		2,007		3,855		4,656
Services	5,910		6,089		18,703		17,997
Supplies	627		686		1,936		2,310
FDIC assessments	1,699		1,867		5,553		8,561
Net loss on non-covered other real estate owned	2,168		2,289		6,244		8,967
Net loss on covered other real estate owned	461		4,755		3,084		5,778
Intangible amortization	1,189		1,222		3,612		3,724
Merger related expenses	85		51		338		303
Other expenses	8,007		6,641		22,620		21,631
Total non-interest expense	86,974		86,224		261,606		253,632
Income before provision for income taxes	38,740		32,579		112,458		79,134
Provision for income taxes	13,587		10,717		38,525		26,020
Net income	25,153		21,862		73,933		53,114
Dividends and undistributed earnings allocated to participating securities	170	[1]	105	[1]	499	[1]	253	[1]
Net earnings available to common shareholders	$ 24,983		$ 21,757		$ 73,434		$ 52,861
Earnings per common share:
Basic	$ 0.22		$ 0.19		$ 0.66		$ 0.46
Diluted	$ 0.22		$ 0.19		$ 0.65		$ 0.46
Weighted average number of common shares outstanding:
Basic	111,899		114,540		111,928		114,576
Diluted	112,151		114,691		112,159		114,769

[1] Represents dividends paid and undistributed earnings allocated to nonvested restricted stock awards.