Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
INTEREST INCOME
Interest and fees on loans	$ 163,059	$ 152,417	$ 322,715	$ 304,362
Interest and dividends on investment securities:
Taxable	24,270	23,868	49,786	48,960
Tax exempt	7,894	7,565	15,724	15,452
Other interest	1,318	1,771	2,385	3,463
Total interest income	196,541	185,621	390,610	372,237
INTEREST EXPENSE
Interest on deposits	11,678	8,141	23,444	15,760
Interest on Federal funds purchased and securities sold under agreements to repurchase	378	235	674	466
Interest on other short-term funding	845	115	1,360	196
Interest on long-term funding	6,923	10,642	16,428	21,514
Total interest expense	19,824	19,133	41,906	37,936
NET INTEREST INCOME	176,717	166,488	348,704	334,301
Provision for credit losses	14,000	5,000	34,000	9,500
Net interest income after provision for credit losses	162,717	161,488	314,704	324,801
NONINTEREST INCOME
Trust service fees	11,509	12,515	22,956	24,602
Service charges on deposit accounts	16,444	15,703	32,717	31,509
Card-based and other nondeposit fees	12,717	13,597	24,708	26,013
Insurance commissions	22,005	20,077	43,387	39,805
Brokerage and annuity commissions	4,098	4,192	7,892	7,875
Mortgage banking, net	4,067	9,941	8,271	17,349
Capital market fees, net	3,793	2,692	7,331	5,159
Bank owned life insurance income	2,973	2,381	7,743	5,256
Asset gains (losses), net	(343)	1,854	181	2,687
Investment securities gains, net	3,116	1,242	6,214	1,242
Other	1,789	2,288	3,960	4,798
Total noninterest income	82,168	86,482	165,360	166,295
NONINTEREST EXPENSE
Personnel expense	102,129	102,986	203,527	203,138
Occupancy	13,215	14,308	27,017	31,991
Equipment	5,396	5,739	10,842	11,511
Technology	14,450	16,354	28,714	31,912
Business development and advertising	6,591	6,829	14,802	12,156
Other intangible amortization	539	888	1,043	1,689
Loan expense	3,442	3,681	6,663	6,677
Legal and professional fees	4,856	4,344	9,881	8,882
Foreclosure / OREO expense	1,330	1,264	3,207	2,426
FDIC expense	8,750	6,000	16,500	12,500
Other	13,662	14,384	26,135	27,887
Total noninterest expense	174,360	176,777	348,331	350,769
Income before income taxes	70,525	71,193	131,733	140,327
Income tax expense	21,434	21,793	40,108	44,255
Net income	49,091	49,400	91,625	96,072
Preferred stock dividends	2,169	1,545	4,367	2,773
Net income available to common equity	$ 46,922	$ 47,855	$ 87,258	$ 93,299
Earnings per common share:
Basic (in usd per share)	$ 0.31	$ 0.32	$ 0.58	$ 0.62
Diluted (in usd per share)	$ 0.31	$ 0.31	$ 0.58	$ 0.61
Average common shares outstanding:
Basic (in shares)	148,511	149,903	148,556	149,986
Diluted (in shares)	149,530	151,108	149,518	151,129