Consolidated Statements of Income and Comprehensive Income (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:
Loans and loans held for sale	$ 182,107	$ 103,005	$ 459,313	$ 309,213
Investment securities:
Taxable	29,766	20,633	78,143	64,834
Tax-exempt	5,624	3,844	15,767	11,270
Total investment securities interest	35,390	24,477	93,910	76,104
Total interest income	217,497	127,482	553,223	385,317
Interest expense:
Interest bearing	809	243	1,784	726
Savings and money market accounts	6,495	5,166	18,279	15,302
Certificates and other time deposits	1,712	2,743	7,149	9,436
Securities sold under agreements to repurchase	306	310	949	854
Wholesale borrowings	936	1,130	2,955	3,399
Long-term debt	3,899	0	9,390
Total interest expense	14,157	9,592	40,506	29,717
Net interest income	203,340	117,890	512,717	355,600
Provision for originated loan losses	(2,523)	(9,965)	(11,482)	(26,860)
Provision for loan and lease losses - acquired loans	2,033	0	2,033	0
Provision for covered loan losses	(1,823)	(6,214)	(10,119)	(15,576)
Provision for Loan and Lease Losses	6,379	16,179	23,634	42,436
Net interest income after provision for loan losses	196,961	101,711	489,083	313,164
Other income:
Trust department income	9,608	6,124	24,515	17,481
Service charges on deposits	22,146	14,603	55,315	43,490
Credit card fees	13,588	11,006	38,128	32,402
ATM and other service fees	5,216	3,680	13,496	11,360
Bank owned life insurance income	4,351	3,094	12,889	9,073
Investment services and insurance	3,403	2,208	9,247	6,843
Investment securities (losses) gains, net	0	553	(2,803)	1,361
Loan sales and servicing income	3,644	7,255	19,492	19,085
Other operating income	9,134	6,402	27,644	20,857
Total other income	71,090	54,925	197,923	161,952
Other expenses:
Salaries, wages, pension and employee benefits	97,390	58,061	260,395	183,632
Net occupancy expense	13,816	8,077	35,444	24,640
Equipment expense	11,040	7,143	28,698	21,845
Stationery, supplies and postage	3,801	2,210	9,304	6,638
Bankcard, loan processing and other costs	40,786	8,424	61,043	24,935
Professional services	9,768	4,702	32,322	17,361
Amortization of intangibles	2,972	456	5,700	1,422
FDIC insurance expense	4,925	1,832	12,601	9,015
Other operating expense	26,880	17,682	62,436	51,944
Total other expenses	211,378	108,587	507,943	341,432
Net income before income tax expense	56,673	48,049	179,063	133,684
Income tax expense	15,958	13,096	52,553	37,802
Net income	40,715	34,953	126,510	95,882
Other comprehensive income (loss), net of taxes:
Changes in unrealized securities' holding gains and (losses), net of taxes of ($6.3) million and $2.4 million for the quarters ended and ($36.3) million and $5.4 million for the nine months ended, respectively	(11,716)	4,884	(69,229)	10,872
Reclassification for realized securities' (gains) and losses, net of taxes of ($0.0) million and $0.19 million for the quarters ended and ($0.98)million and $0.48 million for the nine months ended, respectively	0	(359)	1,822	(885)
Total other comprehensive gain (loss), net of taxes	(11,716)	4,525	(67,407)	9,987
Comprehensive income	28,999	39,478	59,103	105,869
Net income attributable to common shareholders	38,937	34,797	121,544	95,795
Net income used in diluted EPS calculation	$ 38,937	$ 34,797	$ 121,544	$ 95,795
Weighted average number of common shares outstanding - basic	165,044	109,645	144,402	109,473
Weighted average number of common shares outstanding - diluted	168,916	109,645	147,341	109,473
Basic earnings per common share	$ 0.24	$ 0.32	$ 0.84	$ 0.88
Diluted earnings per common share	$ 0.23	$ 0.32	$ 0.82	$ 0.88
Dividend per common share	$ 0.16	$ 0.16	$ 0.48	$ 0.48