Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
INTEREST INCOME
Interest and fees on non-covered loans	$ 313,294		$ 319,702		$ 336,320
Interest and fees on covered loans	73,518		86,011		73,812
Interest and dividends on investment securities:
Taxable	59,078		85,785		67,388
Exempt from federal income tax	9,184		8,653		8,839
Dividends	83		12		14
Interest on temporary investments and interest bearing deposits	928		1,590		2,223
Total interest income	456,085		501,753		488,596
INTEREST EXPENSE
Interest on deposits	31,133		55,743		76,241
Interest on securities sold under agreement to repurchase and federal funds purchased	288		539		517
Interest on term debt	9,279		9,255		9,229
Interest on junior subordinated debentures	8,149		7,764		7,825
Total interest expense	48,849		73,301		93,812
Net interest income	407,236		428,452		394,784
PROVISION FOR NON-COVERED LOAN AND LEASE LOSSES	21,796		46,220		113,668
PROVISION FOR COVERED LOAN AND LEASE LOSSES	7,405		16,141		5,151
Net interest income after provision for loan and lease losses	378,035		366,091		275,965
NON-INTEREST INCOME
Service charges on deposit accounts	28,299		33,096		34,874
Brokerage commissions and fees	12,967		12,787		11,661
Mortgage banking revenue, net	84,216		26,550		21,214
Gain on investment securities, net:
Gain on sale of investment securities, net	4,023		7,735		2,326
Total other-than-temporary impairment losses	(51)		(190)		(93)
Portion of other-than-temporary impairment losses transferred from other comprehensive income	(104)		(169)		(321)
Total gain on investment securities, net	3,868		7,376		1,912
(Loss) gain on junior subordinated debentures carried at fair value	(2,203)		(2,197)		4,980
Bargain purchase gain on acquisition					6,437
Change in FDIC indemnification asset	(15,234)		(6,168)		(16,445)
Other income	24,916		12,674		11,271
Total non-interest income	136,829		84,118		75,904
NON-INTEREST EXPENSE
Salaries and employee benefits	200,946		179,480		162,875
Net occupancy and equipment	55,081		51,284		45,940
Communications	11,573		11,214		10,464
Marketing	5,064		6,138		6,225
Services	25,823		24,170		22,576
Supplies	2,506		2,824		3,998
FDIC assessments	7,308		10,768		15,095
Net loss on non-covered other real estate owned	9,245		10,690		8,097
Net loss (gain) on covered other real estate owned	3,410		7,481		(2,172)
Intangible amortization	4,816		4,948		5,389
Merger related expenses	2,338		360		6,675
Other expenses	31,542		29,614		32,576
Total non-interest expense	359,652		338,971		317,738
Income before provision for income taxes	155,212		111,238		34,131
Provision for income taxes	53,321		36,742		5,805
Net income	101,891		74,496		28,326
Preferred stock dividends					12,192
Dividends and undistributed earnings allocated to participating securities	682	[1]	356	[1]	67	[1]
Net earnings available to common shareholders	$ 101,209		$ 74,140		$ 16,067
Earnings per common share:
Basic	$ 0.90		$ 0.65		$ 0.15
Diluted	$ 0.90		$ 0.65		$ 0.15
Weighted average number of common shares outstanding:
Basic	111,935		114,220		107,922
Diluted	112,151		114,409		108,153

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