Goodwill and other intangible assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets

Total amortizing intangible assets were comprised of the following:

	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
	(In thousands)
December 31, 2016
Core deposit	$	887,459	$	789,988	$	97,471
Other		177,268		177,084		184
Total	$	1,064,727	$	967,072	$	97,655
December 31, 2015
Core deposit	$	887,459	$	750,624	$	136,835
Other		177,268		173,835		3,433
Total	$	1,064,727	$	924,459	$	140,268

Estimated Amortization Expense in Future Years

Estimated amortization expense in future years for such intangible assets is as follows:

	(In thousands)
Year ending December 31:
2017	$	30,305
2018		23,462
2019		18,026
2020		13,323
2021		8,621
Later years		3,918
	$	97,655

Summary of Goodwill Assigned to Reportable Segments for Purposes of Testing for Impairment

A summary of goodwill assigned to each of the Company’s reportable segments as of December 31, 2016 and 2015 for purposes of testing for impairment is as follows.

	(In thousands)
Business Banking	$	864,366
Commercial Banking		1,401,873
Commercial Real Estate		654,389
Discretionary Portfolio		—
Residential Mortgage Banking		—
Retail Banking		1,309,191
All Other		363,293
Total	$	4,593,112