Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
ASSETS
Cash and due from banks	$ 147,684	$ 184,152	$ 197,538
Interest bearing deposits with other banks	253,738	38,813	148,915
Available-for-sale securities, at fair value	2,540,887	2,531,676	2,016,373
Loans and leases	10,822,568	10,835,512	10,475,528
Less: Unearned income	20,874	23,521	30,831
Allowance for credit losses	125,196	123,736	126,506
Net loans and leases	10,676,498	10,688,255	10,318,191
Loans held for sale, at fair value	161,600	166,927	150,046
Premises and equipment, net	305,250	305,561	306,765
Accrued interest receivable	42,329	42,005	41,401
Goodwill	300,798	300,798	291,498
Other identifiable intangibles	20,865	21,894	19,664
Bank-owned life insurance	258,518	258,648	253,427
Other real estate owned	8,458	7,810	12,685
Other assets	149,429	177,849	169,895
TOTAL ASSETS	14,866,054	14,724,388	13,926,398
Deposits:
Demand: Noninterest bearing	3,401,348	3,250,537	3,103,321
Interest bearing	5,182,011	5,034,470	5,033,565
Savings	1,627,621	1,561,819	1,506,942
Other time	1,831,865	1,841,315	1,842,869
Total deposits	12,042,845	11,688,141	11,486,697
Securities sold under agreement to repurchase	375,832	454,002	431,089
Short-term borrowings		92,000
Accrued interest payable	4,109	3,975	3,305
Junior subordinated debt securities		12,888	23,198
Long-term debt	530,000	530,000	67,681
Other liabilities	210,879	219,499	234,635
TOTAL LIABILITIES	13,163,665	13,000,505	12,246,605
SHAREHOLDERS' EQUITY
Common stock, $2.50 par value per share Authorized - 500,000,000 shares; Issued - 92,344,409, 93,696,687 and 94,438,626 shares, respectively	230,861	234,242	236,097
Capital surplus	226,204	271,292	283,800
Accumulated other comprehensive (loss) income	(50,360)	(50,937)	(32,144)
Retained earnings	1,295,684	1,269,286	1,192,040
TOTAL SHAREHOLDERS' EQUITY	1,702,389	1,723,883	1,679,793
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 14,866,054	$ 14,724,388	$ 13,926,398