Components of Net Periodic Benefit Costs (Tables)

3 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

Net periodic benefit (income) cost for Pension Plan, RIM Plan, Post-retirement Plan and split-dollar life insurance arrangement plan benefits for the three months ended March 31, 2019 and 2018, includes the following components:

	For the Three Months Ended March 31,
	Pension Plan						RIM Plan				Post-retirement Plans
	2019			2018			2019		2018		2019		2018			Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	1,501		$	1,780		$	53	$	61	$	172	$	187		Compensation and employee benefits
Interest cost	2,194			2,129			116		111		321		312			Other non-interest expense
Expected return on plan assets	(4,727		)	(4,815		)	—		—		—		—			Other non-interest expense
Amortization:
Prior service cost	—			—			—		—		14		(26		)	Other non-interest expense
Net loss	765			707			61		103		99		195			Other non-interest expense
Net periodic (income) cost	$	(267	)	$	(199	)	$	230	$	275	$	606	$	668

The following table summarizes the impact of retrospective application to the consolidated statement of income for the three months ended March 31, 2018:

	Three Months Ended
	March 31, 2018
	(In thousands)
Compensation and employee benefits:
As previously reported	$	16,525
As reported under new guidance	18,050
Other non-interest expense:
As previously reported	$	3,075
As reported under new guidance	1,550