Consolidated Statement of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income
Loans and leases, including fees	$ 2,778,151	$ 2,596,586	$ 2,734,708
Investment securities
Fully taxable	372,162	340,391	209,244
Exempt from federal taxes	4,263	5,356	6,802
Deposits at banks	15,252	13,361	5,201
Other	1,016	1,183	1,379
Total interest income	3,170,844	2,956,877	2,957,334
Interest expense
Interest-checking deposits	1,404	1,404	1,287
Savings deposits	44,736	45,465	54,948
Time deposits	27,059	15,515	26,439
Deposits at Cayman Islands office	615	699	1,018
Short-term borrowings	1,677	101	430
Long-term borrowings	252,766	217,247	199,983
Total interest expense	328,257	280,431	284,105
Net interest income	2,842,587	2,676,446	2,673,229
Provision for credit losses	170,000	124,000	185,000
Net interest income after provision for credit losses	2,672,587	2,552,446	2,488,229
Other income
Mortgage banking revenues	375,738	362,912	331,265
Service charges on deposit accounts	420,608	427,956	446,941
Trust income	470,640	508,258	496,008
Brokerage services income	64,770	67,212	65,647
Trading account and foreign exchange gains	30,577	29,874	40,828
Gain (loss) on bank investment securities	(130)		56,457
Total other-than-temporary impairment ("OTTI") losses			(1,884)
Portion of OTTI losses recognized in other comprehensive income (before taxes)			(7,916)
Net OTTI losses recognized in earnings			(9,800)
Equity in earnings of Bayview Lending Group LLC	(14,267)	(16,672)	(16,126)
Other revenues from operations	477,101	399,733	453,985
Total other income	1,825,037	1,779,273	1,865,205
Other expense
Salaries and employee benefits	1,549,530	1,404,950	1,355,178
Equipment and net occupancy	272,539	269,299	264,327
Printing, postage and supplies	38,491	38,201	39,557
Amortization of core deposit and other intangible assets	26,424	33,824	46,912
FDIC assessments	52,113	55,531	69,584
Other costs of operations	883,835	887,669	812,308
Other expense	2,822,932	2,689,474	2,587,866
Income (loss) before taxes	1,674,692	1,642,245	1,765,568
Income taxes	595,025	575,999	627,088
Net income	1,079,667	1,066,246	1,138,480
Net income available to common shareholders
Basic	987,689	978,531	1,062,429
Diluted	$ 987,724	$ 978,581	$ 1,062,496
Net income per common share
Basic	$ 7.22	$ 7.47	$ 8.26
Diluted	$ 7.18	$ 7.42	$ 8.20