Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
INTEREST INCOME
Interest and fees on non-covered loans	$ 78,545		$ 77,659
Interest and fees on covered loans	14,580		17,343
Interest and dividends on investment securities:
Taxable	8,644		18,120
Exempt from federal income tax	2,288		2,277
Dividends	24		6
Interest on temporary investments and interest bearing deposits	252		237
Total interest income	104,333		115,642
INTEREST EXPENSE
Interest on deposits	5,878		8,845
Interest on securities sold under agreement to repurchase and federal funds purchased	31		80
Interest on term debt	2,273		2,304
Interest on junior subordinated debentures	1,962		2,058
Total interest expense	10,144		13,287
Net interest income	94,189		102,355
PROVISION FOR NON-COVERED LOAN AND LEASE LOSSES	6,988		3,167
PROVISION (RECAPTURE) FOR COVERED LOAN AND LEASE LOSSES	232		(31)
Net interest income after provision for loan and lease losses	86,969		99,219
NON-INTEREST INCOME
Service charges on deposit accounts	6,992		6,666
Brokerage commissions and fees	3,636		2,944
Mortgage banking revenue, net	23,568		13,082
Gain on investment securities, net	7		148
Loss on junior subordinated debentures carried at fair value	(542)		(548)
Change in FDIC indemnification asset	(5,073)		(1,845)
Other income	5,427		6,790
Total non-interest income	34,015		27,237
NON-INTEREST EXPENSE
Salaries and employee benefits	51,505		47,093
Net occupancy and equipment	14,735		13,498
Communications	3,203		2,942
Marketing	861		990
Services	5,893		6,162
Supplies	718		665
FDIC assessments	1,651		1,968
Net (gain) loss on non-covered other real estate owned	(130)		3,187
Net loss on covered other real estate owned	284		2,454
Intangible amortization	1,204		1,212
Merger related expenses	1,531		100
Other expenses	4,307		7,425
Total non-interest expense	85,762		87,696
Income before income taxes	35,222		38,760
Provision for income taxes	11,861		13,257
Net income	23,361		25,503
Dividends and undistributed earnings allocated to participating securities	183	[1]	167	[1]
Net earnings available to common shareholders	$ 23,178		$ 25,336
Earnings per common share:
Basic (in usd per share)	$ 0.21		$ 0.23
Diluted (in usd per share)	$ 0.21		$ 0.23
Weighted average number of common shares outstanding:
Basic (in shares)	111,937		111,989
Diluted (in shares)	112,118		112,160

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