Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
INTEREST INCOME
Interest and fees on non-covered loans	$ 343,717		$ 313,294		$ 319,702
Interest and fees on covered loans	54,497		73,518		86,011
Interest and dividends on investment securities:
Taxable	34,146		59,078		85,785
Exempt from federal income tax	8,898		9,184		8,653
Dividends	252		83		12
Interest on temporary investments and interest bearing deposits	1,336		928		1,590
Total interest income	442,846		456,085		501,753
INTEREST EXPENSE
Interest on deposits	20,755		31,133		55,743
Interest on securities sold under agreement to repurchase and federal funds purchased	141		288		539
Interest on term debt	9,248		9,279		9,255
Interest on junior subordinated debentures	7,737		8,149		7,764
Total interest expense	37,881		48,849		73,301
Net interest income	404,965		407,236		428,452
PROVISION FOR NON-COVERED LOAN AND LEASE LOSSES	16,829		21,796		46,220
(RECAPTURE OF) PROVISION FOR COVERED LOAN LOSSES	(6,113)		7,405		16,141
Net interest income after provision for loan and lease losses	394,249		378,035		366,091
NON-INTEREST INCOME
Service charges on deposit accounts	30,952		28,299		33,096
Brokerage commissions and fees	14,736		12,967		12,787
Mortgage banking revenue, net	78,885		84,216		26,550
Gain on investment securities, net	209		3,868		7,376
Loss on junior subordinated debentures carried at fair value	(2,197)		(2,203)		(2,197)
Change in FDIC indemnification asset	(25,549)		(15,234)		(6,168)
Other income	24,405		24,916		12,674
Total non-interest income	121,441		136,829		84,118
NON-INTEREST EXPENSE
Salaries and employee benefits	209,991		200,946		179,480
Net occupancy and equipment	62,067		55,081		51,284
Communications	11,974		11,573		11,214
Marketing	6,062		5,064		6,138
Services	25,483		25,823		24,170
Supplies	2,843		2,506		2,824
FDIC assessments	6,954		7,308		10,768
Net loss on non-covered other real estate owned	1,113		9,245		10,690
Net loss on covered other real estate owned	135		3,410		7,481
Intangible amortization	4,781		4,816		4,948
Merger related expenses	8,836		2,338		360
Other expenses	24,422		31,542		29,614
Total non-interest expense	364,661		359,652		338,971
Income before income taxes	151,029		155,212		111,238
Provision for income taxes	52,668		53,321		36,742
Net income	98,361		101,891		74,496
Dividends and undistributed earnings allocated to participating securities	788	[1]	682	[1]	356	[1]
Net earnings available to common shareholders	$ 97,573		$ 101,209		$ 74,140
Earnings per common share:
Basic earnings per common share	$ 0.87		$ 0.90		$ 0.65
Diluted earnings per common share	$ 0.87		$ 0.90		$ 0.65
Weighted average number of common shares outstanding:
Basic (in shares)	111,938		111,935		114,220
Diluted (in shares)	112,176		112,151		114,409

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