Consolidated Statement of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest income
Loans and leases, including fees	$ 863,385	$ 647,179
Investment securities
Fully taxable	98,015	85,957
Exempt from federal taxes	795	1,318
Deposits at banks	10,337	3,118
Other	302	515
Total interest income	972,834	738,087
Interest expense
Interest-checking deposits	414	311
Savings deposits	15,891	10,219
Time deposits	24,322	3,740
Deposits at Cayman Islands office	193	147
Short-term borrowings	2,162	34
Long-term borrowings	57,888	64,048
Total interest expense	100,870	78,499
Net interest income	871,964	659,588
Provision for credit losses	49,000	38,000
Net interest income after provision for credit losses	822,964	621,588
Other income
Mortgage banking revenues	82,063	101,601
Service charges on deposit accounts	102,405	102,344
Trust income	111,077	123,734
Brokerage services income	16,004	15,461
Trading account and foreign exchange gains	7,458	6,231
Gain (loss) on bank investment securities	4	(98)
Other revenues from operations	101,922	90,930
Total other income	420,933	440,203
Other expense
Salaries and employee benefits	431,785	389,893
Equipment and net occupancy	74,178	66,470
Printing, postage and supplies	11,986	9,590
Amortization of core deposit and other intangible assets	12,319	6,793
FDIC assessments	25,225	10,660
Other costs of operations	220,602	202,969
Total other expense	776,095	686,375
Income before taxes	467,802	375,416
Income taxes	169,274	133,803
Net income	298,528	241,613
Net income available to common shareholders
Basic	275,744	218,830
Diluted	$ 275,748	$ 218,837
Net income per common share
Basic	$ 1.74	$ 1.66
Diluted	1.73	1.65
Cash dividends per common share	$ 0.70	$ 0.70
Average common shares outstanding
Basic	158,734	132,049
Diluted	159,181	132,769