Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
ASSETS
Cash and due from banks	$ 197,538	$ 154,192	$ 199,337
Interest bearing deposits with other banks	148,915	43,777	360,469
Available-for-sale securities, at fair value	2,016,373	2,082,329	2,194,373
Loans and leases	10,475,528	10,404,326	9,761,555
Less: Unearned income	30,831	31,548	34,585
Allowance for credit losses	126,506	126,458	136,660
Net loans and leases	10,318,191	10,246,320	9,590,310
Loans held for sale, at fair value	150,046	157,907	186,510
Premises and equipment, net	306,765	308,125	305,335
Accrued interest receivable	41,401	40,901	42,933
Goodwill	291,498	291,498	291,498
Other identifiable intangibles	19,664	20,545	23,476
Bank-owned life insurance	253,427	251,534	246,148
Other real estate owned	12,685	14,759	27,889
Other assets	169,895	186,775	162,044
TOTAL ASSETS	13,926,398	13,798,662	13,630,322
Deposits:
Demand: Noninterest bearing	3,103,321	3,031,528	2,914,949
Interest bearing	5,033,565	5,003,806	4,979,710
Savings	1,506,942	1,442,336	1,395,857
Other time	1,842,869	1,853,491	1,962,138
Total deposits	11,486,697	11,331,161	11,252,654
Federal funds purchased and securities sold under agreement to repurchase	431,089	405,937	384,829
Short-term Federal Home Loan Bank and other short-term borrowings		62,000	1,500
Accrued interest payable	3,305	3,071	3,371
Junior subordinated debt securities	23,198	23,198	23,198
Long-term debt	67,681	69,775	76,055
Other liabilities	234,635	248,076	243,507
TOTAL LIABILITIES	12,246,605	12,143,218	11,985,114
SHAREHOLDERS' EQUITY
Common stock, $2.50 par value per share Authorized - 500,000,000 shares; Issued - 94,438,626, 94,162,728 and 96,544,502 shares, respectively	236,097	235,407	241,361
Capital surplus	283,800	282,934	331,016
Accumulated other comprehensive (loss) income	(32,144)	(41,825)	(37,033)
Retained earnings	1,192,040	1,178,928	1,109,864
TOTAL SHAREHOLDERS' EQUITY	1,679,793	1,655,444	1,645,208
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 13,926,398	$ 13,798,662	$ 13,630,322