Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 545,542	$ 561,838
Interest-bearing deposits	4,347,538	3,560,865
Federal funds sold and resell agreements	159,967	18,742
Total cash and cash equivalents	5,053,047	4,141,445
Securities held to maturity, at amortized cost	1,432,098	2,250,460
Securities available for sale, at estimated fair value	10,489,009	10,203,277
Trading account securities	21,098	16,703
Loans, net of unearned discounts	13,145,665	11,975,392
Less: Allowance for loan losses	(155,364)	(153,045)
Net loans	12,990,301	11,822,347
Premises and equipment, net	520,958	525,821
Goodwill	654,952	654,952
Other intangible assets, net	5,073	6,776
Cash surrender value of life insurance policies	180,477	177,884
Accrued interest receivable and other assets	400,867	396,654
Total assets	31,747,880	30,196,319
Liabilities:
Non-interest-bearing demand deposits	11,197,093	10,513,369
Interest-bearing deposits	15,675,296	15,298,206
Total deposits	26,872,389	25,811,575
Federal funds purchased and repurchase agreements	1,147,824	976,992
Junior subordinated deferrable interest debentures, net of unamortized issuance costs	136,184	136,127
Subordinated notes, net of unamortized issuance costs	98,552	99,990
Accrued interest payable and other liabilities	195,068	169,107
Total liabilities	28,450,017	27,193,791
Shareholders’ Equity:
Preferred stock, par value $0.01 per share; 10,000,000 shares authorized; 6,000,000 Series A shares ($25 liquidation preference) issued in both 2017 and 2016	144,486	144,486
Common stock, par value $0.01 per share; 210,000,000 shares authorized; 64,236,306 shares issued at December 31, 2017 and 63,632,464 shares issued at December 31, 2016	642	637
Additional paid-in capital	953,361	906,732
Retained earnings	2,187,069	1,985,569
Accumulated other comprehensive income, net of tax	79,512	(24,623)
Treasury stock, at cost; 760,720 shares in 2017 and 158,243 in 2016.	(67,207)	(10,273)
Total shareholders’ equity	3,297,863	3,002,528
Total liabilities and shareholders’ equity	$ 31,747,880	$ 30,196,319