Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest income:
Loans, including fees	$ 215,737	$ 215,656	$ 427,080	$ 432,210
Investment securities available for sale	14,490	12,986	29,746	23,718
Trading account assets	90	124	251	278
Mortgage loans held for sale	616	1,411	1,018	3,118
Federal Reserve Bank balances	472	904	998	1,684
Other earning assets	808	432	1,502	895
Total interest income	232,213	231,513	460,595	461,903
Interest expense:
Deposits	13,521	15,894	27,742	32,610
Federal funds purchased and securities sold under repurchase agreements	75	80	151	170
Long-term debt	13,566	13,462	27,136	27,232
Total interest expense	27,162	29,436	55,029	60,012
Net interest income	205,051	202,077	405,566	401,891
Provision for loan losses	12,284	13,077	21,795	48,773
Net interest income after provision for loan losses	192,767	189,000	383,771	353,118
Non-interest income:
Service charges on deposit accounts	19,238	19,195	38,451	38,716
Fiduciary and asset management fees	11,296	11,111	22,329	22,083
Brokerage revenue	6,707	7,002	12,920	14,595
Mortgage banking income	5,283	7,338	8,794	14,255
Bankcard fees	8,695	7,838	16,212	14,902
Investment securities gains, net	0	1,403	1,331	1,448
Other fee income	4,928	5,775	9,791	11,262
Decrease in fair value of private equity investments, net	(119)	(883)	(369)	(1,140)
Gain on sale of Memphis branches, net	0	0	5,789	0
Other non-interest income	7,360	6,313	18,321	13,692
Total non-interest income	63,388	65,092	133,569	129,813
Non-interest expense:
Salaries and other personnel expense	92,540	89,479	185,985	183,396
Net occupancy and equipment expense	26,425	26,383	52,480	50,550
Third-party services	9,464	10,366	19,561	20,295
FDIC insurance and other regulatory fees	8,049	7,941	17,768	16,420
Professional fees	8,224	10,416	15,901	17,511
Advertising expense	6,281	1,821	8,757	3,399
Foreclosed real estate expense, net	4,063	7,502	9,745	18,441
Losses on other loans held for sale, net	(40)	(86)	2,226	79
Visa Indemnification charge	356	764	752	801
Restructuring charges	7,716	1,758	16,293	6,607
Other operating expenses	19,127	24,842	36,897	45,973
Total non-interest expense	182,205	181,186	366,365	363,472
Income before income taxes	73,950	72,906	150,975	119,459
Income tax expense	27,078	27,371	55,686	44,350
Net income	46,872	45,535	95,289	75,109
Dividends and accretion of discount on preferred stock	2,559	14,818	5,119	29,594
Net income available to common shareholders	$ 44,313	$ 30,717	$ 90,170	$ 45,515
Net income per common share, basic	$ 0.32	$ 0.25	$ 0.65	$ 0.39
Net income per common share, diluted	$ 0.32	$ 0.24	$ 0.65	$ 0.35
Weighted average common shares outstanding, basic	138,991	121,585	138,961	117,035
Weighted average common shares outstanding, diluted	139,567	130,134	139,535	130,127