Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2017

Compensation and Retirement Disclosure [Abstract]

Schedule of Contribution Expense

 Our contribution expense is presented in the following table:

	Three Months Ended
	March 31,
(in thousands)	2017		2016
401(k) contribution expense	$	2,767	$	2,462

Net Periodic Benefit Credit for Defined Benefit Plans

The net periodic benefit credit for these plans includes the following components:

	Three Months Ended
	March 31,
(in thousands)	2017			2016
Service cost	$	(4	)	$	(4	)
Interest cost		1,477			1,544
Expected return on plan assets		(2,427	)		(2,353	)
Amortization:
Unrecognized prior service cost		2			2
Unrecognized loss		628			608
Net periodic pension credit	$	(324	)	$	(203	)