Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
INTEREST INCOME
Interest and fees on non-covered loans	$ 93,706		$ 78,090		$ 250,685		$ 233,386
Interest and fees on covered loans	11,837		20,325		41,167		54,603
Interest and dividends on investment securities:
Taxable	7,882		13,057		24,629		47,712
Exempt from federal income tax	2,200		2,302		6,725		6,870
Dividends	51		3		165		37
Interest on temporary investments and interest bearing deposits	284		331		937		736
Total interest income	115,960		114,108		324,308		343,344
INTEREST EXPENSE
Interest on deposits	4,845		7,623		16,587		24,637
Interest on securities sold under agreement to repurchase and federal funds purchased	35		73		99		232
Interest on term debt	2,338		2,335		6,916		6,944
Interest on junior subordinated debentures	1,933		2,037		5,815		6,124
Total interest expense	9,151		12,068		29,417		37,937
Net interest income	106,809		102,040		294,891		305,407
PROVISION FOR NON-COVERED LOAN AND LEASE LOSSES	3,008		7,078		12,989		16,883
(RECAPTURE OF) PROVISION FOR COVERED LOAN LOSSES	(1,904)		2,927		(4,744)		4,302
Net interest income after provision for loan and lease losses	105,705		92,035		286,646		284,222
NON-INTEREST INCOME
Service charges on deposit accounts	8,374		7,122		22,844		20,978
Brokerage commissions and fees	3,854		3,186		11,152		9,662
Mortgage banking revenue, net	15,071		24,346		62,928		53,069
Gain on investment securities, net	3		21		18		1,199
Loss on junior subordinated debentures carried at fair value	(554)		(554)		(1,643)		(1,649)
Change in FDIC indemnification asset	(6,474)		(4,759)		(19,841)		(10,644)
Other income	5,870		4,317		19,198		17,227
Total non-interest income	26,144		33,679		94,656		89,842
NON-INTEREST EXPENSE
Salaries and employee benefits	53,699		49,543		157,271		146,615
Net occupancy and equipment	16,019		13,441		45,813		40,519
Communications	2,772		2,740		8,802		8,527
Marketing	1,596		1,104		3,753		3,855
Services	6,445		5,910		18,339		18,703
Supplies	742		627		2,120		1,936
FDIC assessments	1,709		1,699		5,032		5,553
Net (gain) loss on non-covered other real estate owned	(27)		2,168		(303)		6,244
Net loss on covered other real estate owned	(68)		461		154		3,084
Intangible amortization	1,186		1,189		3,595		3,612
Merger related expenses	4,856		85		7,197		338
Other expenses	6,675		8,007		17,524		22,620
Total non-interest expense	95,604		86,974		269,297		261,606
Income before income taxes	36,245		38,740		112,005		112,458
Provision for income taxes	12,768		13,587		38,914		38,525
Net income	23,477		25,153		73,091		73,933
Dividends and undistributed earnings allocated to participating securities	196	[1]	170	[1]	576	[1]	499	[1]
Net earnings available to common shareholders	$ 23,281		$ 24,983		$ 72,515		$ 73,434
Earnings per common share:
Basic (in usd per share)	$ 0.21		$ 0.22		$ 0.65		$ 0.66
Diluted (in usd per share)	$ 0.21		$ 0.22		$ 0.65		$ 0.65
Weighted average number of common shares outstanding:
Basic (in shares)	111,912		111,899		111,934		111,928
Diluted (in shares)	112,195		112,151		112,154		112,159

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