Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2018

Retirement Benefits [Abstract]

Schedule Of Individually Significant Plans And In Aggregate Other Plans

The following table summarizes plan information relating to the Company’s participation in multi-employer defined benefit pension plans, including company contributions for the last three years, the status under the Pension Protection Act of 2006, as amended by the Consolidated and Further Continuing Appropriations Act of 2015 (“PPA”) of the plans and whether the plans are subject to a funding improvement or rehabilitation plan, or contribution surcharges. The most recent zone status is for the plan’s year-end indicated in the table. The zone status is based on information that the Company received from the plan, as well as from publicly available information on the U.S. Department of Labor website. The PPA zone status for the plan year ended on December 31, 2018 has not been listed because Forms 5500 were not yet available. Among other factors, plans in the red “critical” zone are generally less than 65 percent funded, plans in the yellow “endangered” zone are between 65 and 80 percent funded, and plans in the green zone are at least 80 percent funded. Also listed in the table below are the Company’s contributions to defined contribution plans. Information in the table has been presented separately for individually significant plans and in the aggregate for all other plans.

Pension Fund	EIN/Pension Plan Number		Pension Protection Act Zone Status								Contributions to Plan for the Year Ended December 31,						Funding Plan		Surcharge Imposed
			Status		Plan Year End		Status		Plan Year End		2018		2017		2016
									(in thousands)
Defined Benefit Plans:
National Electrical Benefit Fund		53-0181657 001		Green		12/31/2017		Green		12/31/2016	$	9,840	$	9,542	$	9,040		No		No
Eighth District Electrical Pension Fund		84-6100393 001		Green		3/31/2018		Green		3/31/2017		9,707		7,908		7,519		No		No
Indiana/Kentucky/Ohio Regional Council of Carpenters Pension Fund		51-6123713 001		Green		6/30/2017		Green		6/30/2016		1,157		2,515		696		No		No
IBEW Local 769 Management Pension Plan A		86-6049763 001		Green		6/30/2017		Green		6/30/2016		2,587		2,115		1,709		No		No
Alaska Electrical Pension Plan		92-6005171 001		Green		12/31/2017		Green		12/31/2016		2,723		1,951		1,873		No		No
Defined Contribution Plans:
National Electrical Annuity Plan		52-6132372 001				n/a				n/a		26,559		27,633		22,840		n/a		n/a
Eighth District Electrical Pension Fund Annuity Plan		84-6100393 002				n/a				n/a		4,785		4,109		4,883		n/a		n/a
All other plans:												13,062		9,115		5,236
Total Contributions:											$	70,420	$	64,888	$	53,796