U.K. Pension Plan (Tables)

6 Months Ended

Jun. 30, 2019

Defined Benefit Plan [Abstract]

Schedule of Net Benefit Costs

The following tables summarize the components of the Pension Program related to the net benefit costs recognized in labor and benefits and other income/(loss), net in the Company's consolidated statements of operations for the three and six months ended June 30, 2019 and 2018 (dollars in thousands):

		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2019			2018			2019			2018
Operating expense:
	Service cost(a)	$	3,397		$	3,770		$	6,837		$	7,625
Nonoperating income, net:
	Interest cost	2,336			2,488			4,702			5,033
	Expected return on plan assets	(4,336		)	(4,775		)	(8,727		)	(9,659		)
	Amortization of prior year service cost	44			—			88			—
	Total nonoperating income, net(b)	(1,956		)	(2,287		)	(3,937		)	(4,626		)
Net periodic benefit cost		$	1,441		$	1,483		$	2,900		$	2,999

(a) Included in labor and benefits within the Company’s consolidated statements of operations.

(b) Included in other income/(loss), net within the Company’s consolidated statements of operations.