Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets:
Cash and due from banks	$ 505,333	$ 545,542
Interest-bearing deposits	2,430,289	4,347,538
Federal funds sold and resell agreements	483,867	159,967
Total cash and cash equivalents	3,419,489	5,053,047
Securities held to maturity, at amortized cost	1,111,762	1,432,098
Securities available for sale, at estimated fair value	11,178,591	10,489,009
Trading account securities	22,238	21,098
Loans, net of unearned discounts	13,814,838	13,145,665
Less: Allowance for loan losses	(137,578)	(155,364)
Net loans	13,677,260	12,990,301
Premises and equipment, net	541,236	520,958
Goodwill	654,952	654,952
Other intangible assets, net	3,980	5,073
Cash surrender value of life insurance policies	182,603	180,477
Accrued interest receivable and other assets	431,291	400,867
Total assets	31,223,402	31,747,880
Liabilities:
Non-interest-bearing demand deposits	10,840,513	11,197,093
Interest-bearing deposits	15,508,341	15,675,296
Total deposits	26,348,854	26,872,389
Federal funds purchased and repurchase agreements	1,083,777	1,147,824
Junior subordinated deferrable interest debentures, net of unamortized issuance costs	136,227	136,184
Subordinated notes, net of unamortized issuance costs	98,669	98,552
Accrued interest payable and other liabilities	247,629	195,068
Total liabilities	27,915,156	28,450,017
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 at September 30, 2018 and December 31, 2017	144,486	144,486
Common stock, par value $0.01 per share; 210,000,000 shares authorized; 64,236,306 shares issued at both September 30, 2018 and December 31, 2017	642	642
Additional paid-in capital	962,917	953,361
Retained earnings	2,369,259	2,187,069
Accumulated other comprehensive income (loss), net of tax	(141,235)	79,512
Treasury stock, at cost; 313,490 shares at September 30, 2018 and 760,720 shares at December 31, 2017	(27,823)	(67,207)
Total shareholders’ equity	3,308,246	3,297,863
Total liabilities and shareholders’ equity	$ 31,223,402	$ 31,747,880