Retirement Benefits - (Tables)

9 Months Ended

Sep. 30, 2019

Retirement Benefits [Abstract]

Schedule of components of net periodic pension expense

Net periodic pension expense for the company’s defined benefit pension plans includes the following components:

	Location in Condensed Consolidated Statement of Operations	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)		2019			2018			2019			2018
Service cost	Total cost of revenue	$	3,917		$	4,436		$	11,846		$	13,644
Interest cost	Corporate general and administrative expense	4,832			5,537			14,731			17,118
Expected return on assets	Corporate general and administrative expense	(8,068		)	(9,685		)	(24,540		)	(29,919		)
Amortization of prior service credit	Corporate general and administrative expense	(220		)	(230		)	(667		)	(709		)
Recognized net actuarial loss	Corporate general and administrative expense	2,529			1,803			7,736			5,573
Loss on settlement	Corporate general and administrative expense	—			18,641			—			20,534
Net periodic pension expense		$	2,990		$	20,502		$	9,106		$	26,241