Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following tables summarize the changes in the Company's goodwill for the years ended December 31, 2015, 2016 and 2017.

(in thousands)	Goodwill
	Gross		Accumulated Impairment			Total
Balance, December 31, 2014	$	1,899,159	$	(112,934	)	$	1,786,225
Net additions	1,568		—			1,568
Balance, December 31, 2015	1,900,727		(112,934		)	1,787,793
Reductions	—		(142		)	(142		)
Balance, December 31, 2016	1,900,727		(113,076		)	1,787,651
Balance, December 31, 2017	$	1,900,727	$	(113,076	)	$	1,787,651

As of December 31, 2017, goodwill was allocated to the reporting units as follows:

(in thousands)	Goodwill
	Commercial Bank		Wealth Management		Retail Bank		Total
Balance, December 31, 2017	$	1,033,744	$	2,715	$	751,192	$	1,787,651

Other Intangible Assets

The following tables summarize the changes in the Company's other intangible assets for the years ended December 31, 2015, 2016 and 2017.

	Other Intangible Assets
	Gross		Accumulated Amortization			Net
Balance, December 31, 2014	$	113,471	$	(56,738	)	$	56,733
Amortization	—		(11,225		)	(11,225		)
Balance, December 31, 2015	113,471		(67,963		)	45,508
Amortization	—		(8,622		)	(8,622		)
Balance, December 31, 2016	113,471		(76,585		)	36,886
Amortization	—		(6,756		)	(6,756		)
Balance, December 31, 2017	$	113,471	$	(83,341	)	$	30,130

Finite-lived Intangible Assets Amortization Expense

The table below presents the forecasted amortization expense for intangible assets at December 31, 2017:

(in thousands)
Year	Expected Amortization
2018	$	6,166
2019	5,618
2020	4,986
2021	4,520
2022	4,095
Thereafter	4,745
	$	30,130