Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2013

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, 2013 and 2012 consisted of the following components (in thousands):

	2013			2012
Change in pension benefit obligation
Benefit obligation at beginning of year	$	302,306		$	265,061
Interest cost	12,326			12,460
Actuarial (gain) loss	(1,903		)	21,642
Benefits paid	(9,663		)	(9,543		)
Foreign currency exchange rate changes	5,811			12,686
Benefit obligation at end of year	308,877			302,306
Change in pension plan assets
Fair value of plan assets at beginning of year	239,650			204,080
Actual return on plan assets	27,969			29,231
Employer contributions	5,906			5,933
Benefits paid	(9,663		)	(9,543		)
Foreign currency exchange rate changes	5,949			9,949
Fair value of plan assets at end of year	269,811			239,650
Funded status at end of year	$	(39,066	)	$	(62,656	)

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:

	2013		2012
Unrecognized losses	$	87,461	$	104,556

Schedule of Weighted Average Assumptions Used Calculating Benefit Obligation

The weighted average assumptions used to determine benefit obligations as of December 31, 2013 and 2012 were as follows:

	2013		2012
Discount rate	4.6	%	4.3	%

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, 2013, 2012 and 2011 were as follows:

	2013		2012		2011
Discount rate	4.3	%	4.7	%	5.3	%
Annual rate of return on plan assets	6.7	%	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, 2013, 2012 and 2011 were as follows (in thousands):

	2013			2012			2011
Interest cost	$	12,326		$	12,460		$	13,286
Expected return on plan assets	(14,369		)	(13,058		)	(13,454		)
Amortization of unrecognized loss	2,560			2,433			1,555
Net periodic pension cost	$	517		$	1,835		$	1,387

Schedule of Weighted Average Asset Allocations and Weighted Average Target Allocations

The weighted average asset allocations and weighted average target allocations at December 31, 2013 and 2012 were as follows:

Asset Category	Target Asset Allocation		December 31, 2013		December 31, 2012
Equity securities	45.0	%	53.4	%	63.8	%
Debt securities	55.0	%	46.4	%	35.8	%
Cash	—	%	0.2	%	0.4	%
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 assets of the UK Plan at fair value as of December 31, 2013 and 2012 (in thousands):

	Assets at Fair Value as of December 31, 2013
Asset Category	Level 1		Level 2		Level 3		Total
Equity and equity like investments	$	—	$	138,908	$	5,196	$	144,104
Corporate bonds	—		101,337		—		101,337
Government bonds	—		23,716		—		23,716
Cash	654		—		—		654
Total	$	654	$	263,961	$	5,196	$	269,811

	Assets at Fair Value as of December 31, 2012
Asset Category	Level 1		Level 2		Level 3		Total
Equity and equity like investments	$	—	$	147,957	$	4,996	$	152,953
Corporate bonds	—		62,534		—		62,534
Government bonds	—		23,227		—		23,227
Cash	936		—		—		936
Total	$	936	$	233,718	$	4,996	$	239,650

Schedule of Changes in Fair Value of Plan Assets

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, 2013 and 2012 (in thousands):

Equity and Equity Like Investments	2013		2012
Start of year balance	$	4,996	$	4,690
Actual return on plan assets, relating to assets still held at reporting date	99		90
Purchases, sales and settlements, net	—		—
Change due to exchange rate changes	101		216
End of year balance	$	5,196	$	4,996

Schedule of Expected Benefit Payments

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

	Pension Benefits
2014	$	10,520
2015	10,838
2016	11,166
2017	11,504
2018	11,852
Succeeding five years	64,845

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, 2013 and 2012 (in thousands):

	2013		2012
Projected benefit obligation	$	308,877	$	302,306
Accumulated benefit obligation	$	308,877	$	302,306
Fair value of plan assets	$	269,811	$	239,650

Schedule of Multiemployer Plans

The following table lists all domestic MEPPs to which our contributions exceeded $2.0 million in 2013. Additionally, this table also lists all domestic MEPPs to which we contributed in 2013 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
		2013	2012		2013		2012		2011
Plumbers & Pipefitters National Pension Fund	52-6152779 001	Yellow	Yellow	Implemented	$	12,509	$	10,999	$	12,351	No	February  2014 to August 2017
Sheet Metal Workers National Pension Fund	52-6112463 001	Red	Red	Implemented (3)	9,476		9,837		9,665		No	May 2014 to June 2016
National Electrical Benefit Fund	53-0181657 001	Green	Green	N/A	7,986		7,679		8,541		No	February 2014 to August 2017
Central Pension Fund of the International Union of Operating Engineers and Participating Employers	36-6052390 001	Green	Green	N/A	6,296		6,076		5,392		No	June 2014 to December 2016
Pension, Hospitalization & Benefit Plan of the Electrical Industry- Pension Trust Account	13-6123601 001	Green	Green	N/A	6,189		5,722		5,364		No	May 2014 to 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
		2013	2012		2013	2012	2011
Southern California Pipe Trades Retirement Fund	51-6108443 001	Green	Green	N/A	5,498	3,443	2,903	No	June 2014 to August 2015
National Automatic Sprinkler Industry Pension Fund	52-6054620 001	Red	Red	Implemented (3)	4,226	4,952	5,452	No	April 2014 to June 2016
Plumbers Pipefitters & Mechanical Equipment Service Local Union 392 Pension Plan	31-0655223 001	Red	Red	Implemented	4,128	3,848	3,332	Yes	June 2014
Arizona Pipe Trades Pension Plan	86-6025734 001	Green	Green	N/A	4,108	6,871	2,877	Yes	June 2014
Pipefitters Union Local 537 Pension Fund	51-6030859 001	Green	Green	N/A	3,690	2,747	2,140	Yes	February 2014 to August 2017
Sheet Metal Workers Pension Plan of Northern California	51-6115939 001	Red	Red	Implemented	3,658	3,881	2,604	No	June 2014 to June 2016
Southern California IBEW-NECA Pension Trust Fund	95-6392774 001	Yellow	Yellow	Implemented	3,215	3,266	3,345	No	June 2014 to May 2015
Eighth District Electrical Pension Fund	84-6100393 001	Green	Green	N/A	3,005	3,890	2,159	Yes	February 2014 to July 2016
Electrical Workers Local No. 26 Pension Trust Fund	52-6117919 001	Green	Green	N/A	2,878	3,049	2,244	Yes	January 2015 to May 2015
U.A. Local 393 Pension Trust Fund Defined Benefit	94-6359772 002	Green	Green	N/A	2,811	2,181	1,877	Yes	June 2014 to June 2015
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	2,412	2,179	3,019	No	June 2014
Northern California Pipe Trades Pension Plan	94-3190386 001	Green	Green	N/A	2,258	3,582	2,596	Yes	May 2014 to June 2015
San Diego Electrical Pension Trust	95-6101801 001	Green	Green	N/A	2,162	1,846	1,629	Yes	May 2014 to September 2016
Heating, Piping & Refrigeration Pension Fund	52-1058013 001	Yellow	Yellow	Implemented	2,139	2,078	2,143	No	February 2014 to July 2016
Boilermaker-Blacksmith National Pension Trust	48-6168020 001	Yellow	Yellow	Implemented	1,828	2,996	1,635	No	March 2014 to September 2015
U.A. Local 38 Defined Benefit Pension Plan	94-3042549 001	Yellow	Yellow	Implemented	1,522	927	333	No	June 2014 to June 2017
Local No. 697 IBEW and Electrical Industry Pension Fund	51-6133048 001	Yellow	Yellow	Implemented	1,443	1,757	1,557	Yes	May 2014 to August 2014
Sheet Metal Workers Pension Plan of Southern California, Arizona & Nevada	95-6052257 001	Red	Red	Implemented (3)	1,271	1,072	1,396	No	June 2014
Plumbing & Pipe Fitting Local 219 Pension Fund	34-6682376 001	Red	Red	Implemented	1,142	936	863	Yes	May 2014 to May 2015

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
		2013	2012		2013		2012		2011
Plumbers & Steamfitters Local 150 Pension Fund	58-6116699 001	Yellow	Yellow	Implemented	1,011		1,036		659		Yes	March 2016
Steamfitters Local Union No. 420 Pension Plan	23-2004424 001	Red	Red	Implemented	831		1,557		1,138		No	April 2014 to May 2014
Plumbers & Pipefitters Local 162 Pension Fund	31-6125999 001	Red	Red	Implemented (3)	770		737		433		Yes	May 2014
U.A. Local 467 Defined Benefit Plan	94-2353807 005	Red	Red	Implemented	538		534		396		No	June 2014 to June 2015
Other Multiemployer Pension Plans					42,271		39,038		41,619			Various
Total Contributions					$	141,271	$	138,716	$	129,662

_________________

(1) The zone status represents the most recent available information for the respective MEPP, which may be 2012 or earlier for the 2013 year and 2011 or earlier for the 2012 year.

(2) This information was obtained from the respective plans' Form 5500 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' Form 5500 filing (“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 2013.