Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2018

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost

Components of Net Periodic Benefit Cost

	UNITED STATES
(In thousands)	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
Interest cost	$	1,540		$	1,662		$	3,079		$	3,323
Expected return on plan assets		(2,321	)		(2,322	)		(4,642	)		(4,643	)
Amortization of net actuarial loss		936			788			1,873			1,576
Net periodic benefit cost	$	155		$	128		$	310		$	256

	UNITED KINGDOM
(In thousands)	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
Interest cost	$	144		$	147		$	292		$	290
Expected return on plan assets		(226	)		(198	)		(457	)		(390	)
Amortization of net actuarial loss		56			95			113			187
Net periodic benefit cost (income)	$	(26	)	$	44		$	(52	)	$	87

Defined Contribution Plan Expenses for Company's Retirement Savings Plans and Profit Sharing

Defined contribution plan expenses for the Company’s retirement savings plans and profit sharing were as follows:

(In thousands)	Three Months Ended June 30				Six Months Ended June 30
	2018		2017		2018		2017
Retirement savings plans	$	1,706	$	1,224	$	3,463	$	2,483
Profit sharing		1,068		2,108		2,010		3,951
Total defined contribution expense	$	2,774	$	3,332	$	5,473	$	6,434