Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangibles

The Company’s goodwill and other intangibles (carrying basis and accumulated amortization) at September 30, 2018 and December 31, 2017, were as follows: 

(In thousands)	September 30, 2018			December 31, 2017
Goodwill	$	845,687		$	842,651
Core deposit premiums:
Gross carrying amount	105,984			105,984
Accumulated amortization	(23,802		)	(16,659		)
Core deposit premiums, net	82,182			89,325
Books of business intangible:
Gross carrying amount	15,234			15,414
Accumulated amortization	(3,441		)	(2,827		)
Books of business intangible, net	11,793			12,587
Other intangibles:
Gross carrying amount	2,068			6,037
Accumulated amortization	(2,068		)	(1,878		)
Other intangibles, net	—			4,159
Other intangible assets, net	93,975			106,071
Total goodwill and other intangible assets	$	939,662		$	948,722

Estimated Remaining Amortization Expense

The Company’s estimated remaining amortization expense on intangibles as of September 30, 2018 is as follows:

(In thousands)	Year	Amortization Expense
	Remainder of 2018	$	2,642
	2019	10,565
	2020	10,552
	2021	10,490
	2022	10,438
	Thereafter	49,288
	Total	$	93,975