Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Taxes

Schedule of components of provision for income taxes

	Year Ended December 31,
(dollars in thousands)	2016		2015		2014
Current:
Federal	$	118,080	$	120,134	$	116,933
State and local		20,253		24,900		21,225
Total current		138,333		145,034		138,158
Deferred:
Federal		2,211		(10,386)		(8,960)
State and local		1,107		(5,201)		(1,626)
Total deferred		3,318		(15,587)		(10,586)
Total provision for income taxes	$	141,651	$	129,447	$	127,572

Schedule of components of net deferred income tax assets and liabilities

	December 31,
(dollars in thousands)	2016		2015
Assets:
Deferred compensation expense	$	86,327	$	88,749
Allowance for loan and lease losses and nonperforming assets		54,310		53,964
Investment securities		47,453		23,627
Deferred income and expense		435		7,725
State income taxes		14,293		9,496
Total deferred income tax assets		202,818		183,561
Liabilities:
Leases		(39,397)		(45,908)
Intangible assets		(1,792)		(2,186)
Other		(9,793)		(9,327)
Total deferred income tax liabilities		(50,982)		(57,421)
Net deferred income tax assets	$	151,836	$	126,140

Schedule of reconciliation of Federal statutory to effective income tax rate

	Year Ended December 31,
	2016				2015				2014
(dollars in thousands)	Amount		Percent		Amount		Percent		Amount		Percent
Federal statutory income tax expense and rate	$	130,140	35.00	%	$	120,129	35.00	%	$	120,485	35.00	%
State and local taxes, net of federal income tax benefit		13,884	3.73			12,804	3.73			12,739	3.70
Nontaxable income		(4,628)	(1.24)			(3,570)	(1.04)			(4,972)	(1.44)
Other		2,255	0.61			84	0.02			(680)	(0.20)
Income tax expense and effective income tax rate	$	141,651	38.10	%	$	129,447	37.71	%	$	127,572	37.06	%

Schedule of reconciliation of unrecognized tax benefits

	Year Ended December 31,
	2016						2015						2014
			Interest						Interest						Interest
			and						and						and
(dollars in thousands)	Tax		Penalties		Total		Tax		Penalties		Total		Tax		Penalties		Total
Balance at beginning of year	$	5,903	$	2,935	$	8,838	$	5,748	$	2,972	$	8,720	$	5,433	$	3,044	$	8,477
Additions for current year tax positions		490		—		490		680		—		680		589		—		589
Additions for Reorganization Transactions		121,401		7,017		128,418		—		—		—		—		—		—
Additions for prior years' tax positions:
Accrual of interest and penalties		—		301		301		—		178		178		—		542		542
Other		—		—		—		97		25		122		346		(4)		342
Reductions for prior years' tax positions:
Expiration of statute of limitations		(709)		(288)		(997)		(622)		(240)		(862)		(620)		(610)		(1,230)
Balance at December 31,	$	127,085	$	9,965	$	137,050	$	5,903	$	2,935	$	8,838	$	5,748	$	2,972	$	8,720