Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 328,260	$ 483,666
Interest-bearing deposits in other financial institutions	94,918	199,702
Federal funds sold and securities purchased under agreements to resell	10,000	32,650
Investment securities held to maturity, at amortized cost	2,443,203	2,282,853
Investment securities available for sale, at fair value	4,485,875	4,043,446
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	233,216	165,331
Residential loans held for sale	103,953	85,544
Commercial loans held for sale	6,091	0
Loans	22,810,491	20,784,991
Allowance for loan losses	(257,058)	(265,880)
Loans, net	22,553,433	20,519,111
Bank and corporate owned life insurance	657,841	591,057
Tax credit and other investments	142,368	147,099
Trading assets	102,890	69,675
Premises and equipment, net	381,327	330,963
Goodwill	1,153,156	976,239
Mortgage servicing rights, net	66,407	58,384
Other intangible assets, net	79,714	15,580
Other assets	523,855	482,294
Total assets	33,366,505	30,483,594
Liabilities and Stockholders’ Equity
Noninterest-bearing demand deposits	5,458,473	5,478,416
Interest-bearing deposits	18,367,129	17,307,546
Total deposits	23,825,602	22,785,962
Federal funds purchased and securities sold under agreements to repurchase	283,954	324,815
Other short-term funding	1,862,420	351,467
Long-term funding	3,233,338	3,397,450
Trading liabilities	100,247	67,660
Accrued expenses and other liabilities	348,246	318,797
Total liabilities	29,653,806	27,246,151
Stockholders’ Equity
Preferred equity	159,853	159,929
Common stock	1,741	1,618
Surplus	1,823,800	1,454,188
Retained earnings	1,859,068	1,819,230
Accumulated other comprehensive income (loss)	(107,673)	(62,758)
Treasury stock, at cost	(24,089)	(134,764)
Total common equity	3,552,847	3,077,514
Total stockholders’ equity	3,712,699	3,237,443
Total liabilities and stockholders’ equity	$ 33,366,505	$ 30,483,594
Preferred shares issued	165,000	165,000
Preferred shares authorized (par value $1.00 per share)	750,000	750,000
Common shares issued	174,107,786	161,751,975
Common shares authorized (par value $0.01 per share)	250,000,000	250,000,000
Treasury shares of common stock	1,925,673	8,908,448