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:
Loans and loans held for sale	$ 635,872	$ 410,299	$ 438,393
Investment securities:
Taxable	108,824	85,030	87,044
Tax-exempt	21,107	15,354	12,819
Total investment securities interest	129,931	100,384	99,863
Total interest income	765,803	510,683	538,256
Interest expense:
Interest bearing	2,543	987	816
Savings and money market accounts	24,406	20,563	28,171
Certificates and other time deposits	9,649	11,723	20,003
Securities sold under agreements to repurchase	1,240	1,157	3,344
Wholesale borrowings	3,893	4,423	6,295
Long-term debt	13,287	0	0
Total interest expense	55,018	38,853	58,629
Net interest income	710,785	471,830	479,627
Provision for Loan, Lease, and Other Losses	33,684	54,698	74,388
Net interest income after provision for loan losses	677,101	417,132	405,239
Noninterest income:
Trust department income	34,770	23,143	22,396
Service charges on deposits	74,399	57,737	64,082
Credit card fees	50,542	43,569	49,539
ATM and other service fees	19,155	14,792	13,701
Bank owned life insurance income	16,926	12,140	14,820
Investment services and insurance	12,777	8,990	8,228
Investment securities gains/(losses), net	(2,803)	3,786	11,081
Loan sales and servicing income	23,069	27,031	14,533
Other operating income	41,508	32,416	26,377
Total noninterest income	270,343	223,604	224,757
Noninterest expense:
Salaries, wages, pension and employee benefits	354,016	245,192	240,362
Net occupancy expense	49,510	31,754	32,414
Equipment expense	41,875	29,243	27,959
Stationery, supplies and postage	14,199	8,800	10,691
Bankcard, loan processing and other costs	71,929	34,195	32,226
Professional services	40,680	23,480	23,229
Amortization of intangibles	8,392	1,866	2,172
FDIC insurance expense	17,707	10,753	17,306
Other operating expense	89,026	68,330	77,986
Total noninterest expense	687,334	453,613	464,345
Income before income tax expense	260,110	187,123	165,651
Income tax expense	76,426	53,017	46,093
Net income	183,684	134,106	119,558
Less: Net income allocated to participating securities	1,545	0	0
Preferred Stock dividends	5,337	0	0
Net income attributable to common shareholders	$ 176,802	$ 134,106	$ 119,558
Basic earnings per common share	$ 1.18	$ 1.22	$ 1.10
Diluted earnings per common share	$ 1.18	$ 1.22	$ 1.10
Cash dividend per common share	$ 0.64	$ 0.64	$ 0.64
Weighted average number of common shares outstanding - basic	149,607	109,518	109,102
Weighted average number of common shares outstanding - diluted	150,421	109,518	109,102