Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets:
Cash and due from banks	$ 509,191	$ 545,542
Interest-bearing deposits	2,476,587	4,347,538
Federal funds sold and resell agreements	329,692	159,967
Total cash and cash equivalents	3,315,470	5,053,047
Securities held to maturity, at amortized cost	1,236,511	1,432,098
Securities available for sale, at estimated fair value	10,717,743	10,489,009
Trading account securities	21,334	21,098
Loans, net of unearned discounts	13,711,762	13,145,665
Less: Allowance for loan losses	(150,226)	(155,364)
Net loans	13,561,536	12,990,301
Premises and equipment, net	539,861	520,958
Goodwill	654,952	654,952
Other intangible assets, net	4,316	5,073
Cash surrender value of life insurance policies	181,756	180,477
Accrued interest receivable and other assets	453,735	400,867
Total assets	30,687,214	31,747,880
Liabilities:
Non-interest-bearing demand deposits	10,525,998	11,197,093
Interest-bearing deposits	15,470,501	15,675,296
Total deposits	25,996,499	26,872,389
Federal funds purchased and repurchase agreements	977,470	1,147,824
Junior subordinated deferrable interest debentures, net of unamortized issuance costs	136,213	136,184
Subordinated notes, net of unamortized issuance costs	98,630	98,552
Accrued interest payable and other liabilities	168,890	195,068
Total liabilities	27,377,702	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 June 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 June 30, 2018 and December 31, 2017	642	642
Additional paid-in capital	960,121	953,361
Retained earnings	2,297,099	2,187,069
Accumulated other comprehensive income, net of tax	(63,319)	79,512
Treasury stock, at cost; 332,722 shares at June 30, 2018 and 760,720 shares at December 31, 2017	(29,517)	(67,207)
Total shareholders’ equity	3,309,512	3,297,863
Total liabilities and shareholders’ equity	$ 30,687,214	$ 31,747,880