U.K. Pension Plan (Tables)

12 Months Ended

Dec. 31, 2015

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of Net Funded Status

The following table summarizes the funding obligations and assets of the Pension Program as of December 31, 2015 (dollars in thousands):

	December 31, 2015
Projected benefit obligation (100%)	$	580,054
Fair value of plan assets (100%)	462,177
Funded status (100%)	(117,877		)
Employees' share of deficit (40%)	(47,152		)
Net pension liability recognized in the balance sheet (60%)	$	(70,725	)

Schedule of Changes in Projected Benefit Obligations

The following table presents the changes in the Company's portion of the benefit obligation and fair value of plan assets of the Pension Program since the March 25, 2015 acquisition date for the year ended December 31, 2015 and funded status as of December 31, 2015 (dollars in thousands):

	2015
Change in benefit obligations:
Benefit obligation at March 25, 2015	$	359,941
Service cost	10,911
Interest cost	8,475
Benefits paid	(5,890		)
Actuarial gain	(21,731		)
Exchange rate changes	(3,673		)
Benefit obligation at end of year	$	348,033
Change in plan assets:
Fair value of plan assets at March 25, 2015	$	274,787
Actual return on plan assets	1,609
Benefits paid	(5,890		)
Employer contributions	9,606
Exchange rate changes	(2,804		)
Fair value of plan assets at end of year	$	277,308
Funded status, December 31, 2015	$	(70,725	)

Schedule of Changes in Fair Value of Plan Assets

The following table presents the changes in the Company's portion of the benefit obligation and fair value of plan assets of the Pension Program since the March 25, 2015 acquisition date for the year ended December 31, 2015 and funded status as of December 31, 2015 (dollars in thousands):

	2015
Change in benefit obligations:
Benefit obligation at March 25, 2015	$	359,941
Service cost	10,911
Interest cost	8,475
Benefits paid	(5,890		)
Actuarial gain	(21,731		)
Exchange rate changes	(3,673		)
Benefit obligation at end of year	$	348,033
Change in plan assets:
Fair value of plan assets at March 25, 2015	$	274,787
Actual return on plan assets	1,609
Benefits paid	(5,890		)
Employer contributions	9,606
Exchange rate changes	(2,804		)
Fair value of plan assets at end of year	$	277,308
Funded status, December 31, 2015	$	(70,725	)

Schedule of Amounts Recognized in Balance Sheet

The following table presents the amounts recognized for the Pension Program in the consolidated balance sheet as of December 31, 2015 and in other comprehensive income/(loss) since the March 25, 2015 acquisition date for the year ended December 31, 2015 (dollars in thousands):

	December 31, 2015
Amounts recognized in the consolidated balance sheet:
Accrued expenses	$	(7,994	)
Other long-term liabilities	(62,731		)
Total amount recognized in the consolidated balance sheet	$	(70,725	)
Amount recognized in other comprehensive income/(loss):
Net actuarial gain	$	13,198

Schedule of Amounts Recognized in Other Comprehensive Income (Loss)

The following table presents the amounts recognized for the Pension Program in the consolidated balance sheet as of December 31, 2015 and in other comprehensive income/(loss) since the March 25, 2015 acquisition date for the year ended December 31, 2015 (dollars in thousands):

	December 31, 2015
Amounts recognized in the consolidated balance sheet:
Accrued expenses	$	(7,994	)
Other long-term liabilities	(62,731		)
Total amount recognized in the consolidated balance sheet	$	(70,725	)
Amount recognized in other comprehensive income/(loss):
Net actuarial gain	$	13,198

Schedule of Net Benefit Costs

The following table summarizes the components of the Pension Program related to the net benefit costs recognized in labor and benefits in the Company's consolidated statement of operations since the March 25, 2015 acquisition date for the year ended December 31, 2015 (dollars in thousands):

	December 31, 2015
Service cost	$	10,911
Interest cost	8,475
Expected return on plan assets	(12,029		)
Exchange rate changes	291
Net periodic benefit cost	$	7,648

Schedule of Assumptions Used

The following table presents the actuarial assumptions used to compute the funded status of the Pension Program as of December 31, 2015 and for the calculation of net periodic pension expense associated with the Pension Program since the March 25, 2015 acquisition date for the year ended December 31, 2015:

Discount rate	3.2	%
Price inflation (RPI measure)	3.0	%
Pension increases (CPI measure)	1.7	%
Salary increases	3.4	%
Expected return on plan assets	5.9	%

Schedule of Asset Allocation Policy

The Pension Program's asset allocation policy states the assets should be allocated as follows:

	Percentage
Asset category:
Return-seeking assets	81	%
Defensive/other assets	19	%
Total	100	%

Schedule of Defined Benefit Plan Expected Return on Assets

The following table provides the Pension Program's allocation of assets among the pooled investment funds and the expected return on assets for each pooled fund, net of expenses, as well as the weighted average expected return on assets used in the actuarial calculations as of December 31, 2015:

	Weighted Average Expected Yields		Weighted Average Asset Allocation		Weighted Average Expected Return on Plan Assets
Growth, private equity and infrastructure pooled funds	6.9	%	81	%	5.6	%
Defensive and government bond pooled fund plus cash	2.3	%	19	%	0.3	%
Expected return on plan assets					5.9	%

Schedule of Allocation of Plan Assets

The following table presents the fair value of the major categories of the Pension Program's assets segregated according to the hierarchy of valuation inputs for measuring fair value (see Note 2, Significant Accounting Policies) as of December 31, 2015 (dollars in thousands):

	Quoted Prices in Active Markets for Identical Assets/(Liabilities) (Level 1)		Significant Other Observable Inputs (Level 2)		Total Fair Value of Assets
Growth pooled fund (a)	$	—	$	182,224	$	182,224
Private equity pooled fund (b)	—		—		31,237
Government bond pooled fund (c)	—		52,463		52,463
Infrastructure pooled fund (d)	—		—		10,911
Cash	473		—		473
Fair value of plan assets	$	473	$	234,687	$	277,308

(a) The growth pooled fund is comprised of global equities, emerging market bonds and hedge funds. Fair value is measured using the net asset value per share.

(b) The private equity pooled fund is comprised of a series of sub funds, each representing a different vintage of private equity investment. Fair value is measured using the net asset value per share.

(c) The government bond pooled fund is comprised of government debt for developed markets, global investment grade corporate bonds and the non-government bond pooled fund. Fair value is measured using the net asset value per share.

(d) Infrastructure pooled fund is comprised of investments in facilities, structures and services required to facilitate the orderly operation of the economy. Fair value is measured using the net asset value per share.

Schedule of Expected Benefit Payments

The following benefit payments are expected to be paid between 2016 and 2025 (dollars in thousands):

	Amount
2016	$	8,010
2017	$	8,171
2018	$	8,333
2019	$	8,500
2020	$	8,671
2021 - 2025	$	45,553