Consolidated Statement of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest income
Loans and leases, including fees	$ 867,478	$ 662,633	$ 1,730,863	$ 1,309,812
Investment securities
Fully taxable	91,184	93,144	189,199	179,101
Exempt from federal taxes	663	1,062	1,458	2,380
Deposits at banks	10,993	3,351	21,330	6,469
Other	303	164	605	679
Total interest income	970,621	760,354	1,943,455	1,498,441
Interest expense
Interest-checking deposits	400	349	814	660
Savings deposits	20,134	10,361	36,025	20,580
Time deposits	26,867	3,690	51,189	7,430
Deposits at Cayman Islands office	181	150	374	297
Short-term borrowings	1,143	36	3,305	70
Long-term borrowings	58,077	62,640	115,965	126,688
Total interest expense	106,802	77,226	207,672	155,725
Net interest income	863,819	683,128	1,735,783	1,342,716
Provision for credit losses	32,000	30,000	81,000	68,000
Net interest income after provision for credit losses	831,819	653,128	1,654,783	1,274,716
Other income
Mortgage banking revenues	89,383	102,602	171,446	204,203
Service charges on deposit accounts	103,872	105,257	206,277	207,601
Trust income	120,450	118,598	231,527	242,332
Brokerage services income	16,272	16,861	32,276	32,322
Trading account and foreign exchange gains	13,222	6,046	20,680	12,277
Gain (loss) on bank investment securities	264	(10)	268	(108)
Other revenues from operations	104,791	147,673	206,713	238,603
Total other income	448,254	497,027	869,187	937,230
Other expense
Salaries and employee benefits	398,675	361,657	830,460	751,550
Equipment and net occupancy	75,724	66,852	149,902	133,322
Printing, postage and supplies	9,907	9,305	21,893	18,895
Amortization of core deposit and other intangible assets	11,418	5,965	23,737	12,758
FDIC assessments	22,370	10,801	47,595	21,461
Other costs of operations	231,801	242,048	452,403	445,017
Total other expense	749,895	696,628	1,525,990	1,383,003
Income before taxes	530,178	453,527	997,980	828,943
Income taxes	194,147	166,839	363,421	300,642
Net income	336,031	286,688	634,559	528,301
Net income available to common shareholders
Basic	312,968	263,471	588,697	482,295
Diluted	$ 312,974	$ 263,481	$ 588,707	$ 482,313
Net income per common share
Basic	$ 1.98	$ 1.99	$ 3.72	$ 3.65
Diluted	1.98	1.98	3.71	3.63
Cash dividends per common share	$ 0.70	$ 0.70	$ 1.40	$ 1.40
Average common shares outstanding
Basic	157,802	132,356	158,268	132,203
Diluted	158,341	133,116	158,761	132,944