Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of Changes in Benefit Obligations and Assets

The change in benefit obligations and assets of the UK Plan for the years ended December 31, 2015 and 2014 consisted of the following components (in thousands):

	2015			2014
Change in pension benefit obligation
Benefit obligation at beginning of year	$	332,806		$	308,877
Interest cost	11,603			14,027
Actuarial (gain) loss	(21,707		)	40,906
Benefits paid	(9,604		)	(9,915		)
Foreign currency exchange rate changes	(17,273		)	(21,089		)
Benefit obligation at end of year	295,825			332,806
Change in pension plan assets
Fair value of plan assets at beginning of year	282,095			269,811
Actual return on plan assets	569			34,012
Employer contributions	5,631			6,028
Benefits paid	(9,604		)	(9,915		)
Foreign currency exchange rate changes	(15,136		)	(17,841		)
Fair value of plan assets at end of year	263,555			282,095
Funded status at end of year	$	(32,270	)	$	(50,711	)

Schedule of Net Periodic Benefit Cost Not yet Recognized

Amounts not yet reflected in net periodic pension cost and included in accumulated other comprehensive loss:

	2015		2014
Unrecognized losses	$	88,818	$	102,673

Schedule of Weighted Average Assumptions Used Calculating Benefit Obligation

The weighted average assumptions used to determine benefit obligations as of December 31, 2015 and 2014 were as follows:

	2015		2014
Discount rate	3.8	%	3.6	%

Schedule of Weighted Average Assumptions Used Calculate Net Periodic Pension Cost

The weighted average assumptions used to determine net periodic pension cost for the years ended December 31, 2015, 2014 and 2013 were as follows:

	2015		2014		2013
Discount rate	3.6	%	4.6	%	4.3	%
Annual rate of return on plan assets	6.3	%	6.7	%	6.7	%

Components Of Net Periodic Pension Cost

The components of net periodic pension cost of the UK Plan for the years ended December 31, 2015, 2014 and 2013 were as follows (in thousands):

	2015			2014			2013
Interest cost	$	11,603		$	14,027		$	12,326
Expected return on plan assets	(16,181		)	(16,888		)	(14,369		)
Amortization of unrecognized loss	2,526			2,029			2,560
Net periodic pension cost	$	(2,052	)	$	(832	)	$	517

Schedule of Weighted Average Asset Allocations and Weighted Average Target Allocations

The weighted average asset allocations and weighted average target allocations at December 31, 2015 and 2014 were as follows:

Asset Category	Target Asset Allocation		December 31, 2015		December 31, 2014
Equity securities	45.0	%	43.3	%	43.2	%
Debt securities	55.0	%	56.3	%	56.6	%
Cash	—	%	0.4	%	0.2	%
Total	100.0	%	100.0	%	100.0	%

Schedule of Plan Assets Fair Value Hierarchy

The following tables set forth by level, within the fair value hierarchy discussed in Note 10 - Fair Value Measurements, the fair value of assets of the UK Plan as of December 31, 2015 and 2014 (in thousands):

	Assets at Fair Value as of December 31, 2015
Asset Category	Level 1		Level 2		Level 3		Total
Equity and equity like investments	$	—	$	114,213	$	—	$	114,213
Corporate bonds	—		114,434		—		114,434
Government bonds	—		34,011		—		34,011
Cash	897		—		—		897
Total	$	897	$	262,658	$	—	$	263,555

	Assets at Fair Value as of December 31, 2014
Asset Category	Level 1		Level 2		Level 3		Total
Equity and equity like investments	$	—	$	121,739	$	—	$	121,739
Corporate bonds	—		124,380		—		124,380
Government bonds	—		35,319		—		35,319
Cash	657		—		—		657
Total	$	657	$	281,438	$	—	$	282,095

Schedule of Changes in Fair Value of Plan Assets (Level 3)

The table below sets forth a summary of changes in the fair value of the UK Plan’s Level 3 assets for the years ended December 31, 2015 and 2014 (in thousands):

Equity and Equity Like Investments	2015		2014
Start of year balance	$	—	$	5,196
Actual return on plan assets, relating to assets still held at reporting date	—		—
Purchases, sales and settlements, net	—		(4,889		)
Change due to exchange rate changes	—		(307		)
End of year balance	$	—	$	—

Schedule of Expected Benefit Payments

The following estimated benefit payments are expected to be paid in the following years (in thousands):

	Pension Benefits
2016	$	9,509
2017	$	9,869
2018	$	10,974
2019	$	11,717
2020	$	11,842
Succeeding five years	$	65,494

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets

The following table shows certain information for the UK Plan where the accumulated benefit obligation is in excess of plan assets as of December 31, 2015 and 2014 (in thousands):

	2015		2014
Projected benefit obligation	$	295,825	$	332,806
Accumulated benefit obligation	$	295,825	$	332,806
Fair value of plan assets	$	263,555	$	282,095

Schedule of Multiemployer Plans

The following table lists all domestic MEPPs to which our contributions exceeded $2.0 million in 2015. Additionally, this table also lists all domestic MEPPs to which we contributed in 2015 in excess of $0.5 million for MEPPs in the critical status, “red zone” and $1.0 million in the endangered status, “orange or yellow zones”, as defined by the PPA (in thousands):     

Pension Fund	EIN/Pension Plan Number	PPA Zone Status (1)		FIP/RP Status	Contributions						Contributions greater than 5% of total plan contributions (2)	Expiration date of CBA
		2015	2014		2015		2014		2013
Plumbers & Pipefitters National Pension Fund	52-6152779 001	Yellow	Yellow	Implemented	$	12,021	$	10,425	$	12,509	No	January  2016 to August 2019
Sheet Metal Workers National Pension Fund	52-6112463 001	Yellow	Yellow	Implemented	10,891		9,977		9,476		No	April 2016 to June 2020
National Electrical Benefit Fund	53-0181657 001	Green	Green	N/A	8,513		7,985		7,986		No	February 2016 to September 2020
Pension, Hospitalization & Benefit Plan of the Electrical Industry- Pension Trust Account	13-6123601 001	Green	Green	N/A	7,543		6,219		6,189		No	May 2016 to January 2018

Pension Fund	EIN/Pension Plan Number	PPA Zone Status (1)		FIP/RP Status	Contributions			Contributions greater than 5% of total plan contributions (2)	Expiration date of CBA
		2015	2014		2015	2014	2013
National Automatic Sprinkler Industry Pension Fund	52-6054620 001	Red	Red	Implemented	6,697	6,000	4,226	No	March 2016 to June 2017
Central Pension Fund of the International Union of Operating Engineers and Participating Employers	36-6052390 001	Green	Green	N/A	6,465	6,518	6,296	No	January 2016 to November 2019
Electrical Contractors Association of the City of Chicago Local Union 134, IBEW Joint Pension Trust of Chicago Pension Plan 2	51-6030753 002	Green	Green	N/A	5,759	4,051	2,412	No	May 2016 to June 2016
Plumbers Pipefitters & Mechanical Equipment Service Local Union 392 Pension Plan	31-0655223 001	Red	Red	Implemented	5,554	4,962	4,128	Yes	June 2019
Sheet Metal Workers Pension Plan of Northern California	51-6115939 001	Red	Red	Implemented	4,851	3,467	3,658	No	June 2016 to June 2018
U.A. Local 393 Pension Trust Fund Defined Benefit	94-6359772 002	Green	Green	N/A	4,597	3,585	2,811	Yes	June 2016 to June 2018
Pipefitters Union Local 537 Pension Fund	51-6030859 001	Green	Green	N/A	3,939	2,981	3,690	Yes	January 2016 to August 2017
Northern California Pipe Trades Pension Plan	94-3190386 001	Green	Green	N/A	3,544	3,270	2,258	Yes	June 2016 to June 2018
Eighth District Electrical Pension Fund	84-6100393 001	Green	Green	N/A	3,411	2,695	3,005	Yes	February 2016 to May 2018
Southern California IBEW-NECA Pension Trust Fund	95-6392774 001	Orange	Yellow	Implemented	2,894	2,776	3,215	No	May 2016 to November 2019
Southern California Pipe Trades Retirement Fund	51-6108443 001	Green	Green	N/A	2,743	2,863	5,498	No	June 2016 to August 2019
Electrical Workers Local No. 26 Pension Trust Fund	52-6117919 001	Green	Green	N/A	2,620	2,880	2,878	Yes	June 2016 to July 2018
U.A. Plumbers Local 24 Pension Fund	22-6042823 001	Green	Green	N/A	2,431	1,998	1,330	Yes	April 2016
Sheet Metal Workers Pension Plan of Southern California, Arizona & Nevada	95-6052257 001	Red	Red	Implemented	2,310	1,824	1,271	No	June 2016 to June 2020
San Diego Electrical Pension Plan	95-6101801 001	Red	Green	Pending	2,109	1,878	2,162	Yes	September 2016 to May 2020
U.A. Local 38 Defined Benefit Pension Plan	94-1285319 001	Yellow	Yellow	Implemented	1,526	1,605	1,522	No	June 2016 to June 2017
Boilermaker-Blacksmith National Pension Trust	48-6168020 001	Yellow	Yellow	Implemented	1,367	1,177	1,828	No	April 2017 to September 2018
Plumbing & Pipe Fitting Local 219 Pension Fund	34-6682376 001	Red	Red	Implemented	1,262	1,107	1,142	Yes	May 2017
Building Trades United Pension Trust Fund Milwaukee and Vicinity	51-6049409 001	Yellow	Yellow	Implemented	1,111	1,033	918	No	May 2016

Pension Fund	EIN/Pension Plan Number	PPA Zone Status (1)		FIP/RP Status	Contributions						Contributions greater than 5% of total plan contributions (2)	Expiration date of CBA
		2015	2014		2015		2014		2013
Steamfitters Local Union No. 420 Pension Plan	23-2004424 001	Red	Red	Implemented	845		862		831		No	April 2017 to May 2017
U.A. Local 467 Defined Benefit Plan	94-2353807 005	Red	Red	Implemented	844		787		538		No	June 2016 to June 2018
Plumbers & Pipefitters Local 162 Pension Fund	31-6125999 001	Red	Red	Implemented (3)	814		818		770		Yes	May 2019
Other Multiemployer Pension Plans					40,395		44,248		48,724			Various
Total Contributions					$	147,056	$	137,991	$	141,271

_________________

(1) The zone status represents the most recent available information for the respective MEPP, which may be 2014 or earlier for the 2015 year and 2013 or earlier for the 2014 year.

(2) This information was obtained from the respective plans’ Form 5500 (“Forms”) for the most current available filing. These dates may not correspond with our fiscal year contributions. The above noted percentages of contributions are based upon disclosures contained in the plans’ Forms. Those Forms, among other things, disclose the names of individual participating employers whose annual contributions account for more than 5% of the aggregate annual amount contributed by all participating employers for a plan year. Accordingly, if the annual contribution of two or more of our subsidiaries each accounted for less than 5% of such contributions, but in the aggregate accounted for in excess of 5% of such contributions, that greater percentage is not available and accordingly is not disclosed.

(3) For these respective plans, a funding surcharge was currently in effect for 2015.