Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures

The following table provides a reconciliation of benefit obligations, plan assets and the funded status of the pension plans and other postretirement benefits:

	Pension Benefits						Other Postretirement Benefits
	2016			2015			2016			2015
Change in benefit obligation:
Benefit obligation at January 1	$	(133,506	)	$	(150,199	)	$	(8,434	)	$	(9,031	)
Service cost	(547		)	(532		)	(5		)	(8		)
Interest cost	(5,419		)	(4,992		)	(385		)	(371		)
Plan settlement	—			17,047			—			—
Special termination benefits	—			(3,831		)	—			—
Benefits paid	9,596			9,879			695			522
Expenses paid	309			490			—			—
Actuarial (gain) loss	(3,154		)	(1,368		)	(553		)	454
Benefit obligation at December 31	$	(132,721	)	$	(133,506	)	$	(8,682	)	$	(8,434	)
Change in plan assets:
Fair value of plan assets at January 1	$	106,620		$	134,017		$	—		$	—
Actual return on plan assets	6,720			(327		)	—			—
Plan settlement	—			(17,047		)	—			—
Expenses paid	(309		)	(490		)	—			—
Contributions	346			346			695			522
Benefits paid	(9,596		)	(9,879		)	(695		)	(522		)
Fair value of plan assets at December 31	$	103,781		$	106,620		$	—		$	—
Unfunded status at December 31	$	(28,940	)	$	(26,886	)	$	(8,682	)	$	(8,434	)
Amounts recognized in the consolidated balance sheets:
Prepaid pension costs	$	22,273		$	20,650		$	—		$	—
Other accrued liabilities	(316		)	(320		)	(621		)	(595		)
Non-current employee benefit liabilities	(50,897		)	(47,216		)	(8,061		)	(7,839		)
Net amounts recognized	$	(28,940	)	$	(26,886	)	$	(8,682	)	$	(8,434	)

Schedule of Net Benefit Costs

	Pension Benefits									Other Postretirement Benefits
	2016			2015			2014			2016			2015			2014
Service cost — benefits earned during the period	$	547		$	532		$	523		$	5		$	8		$	9
Interest cost on projected benefit obligation	5,419			4,992			6,196			385			371			430
Expected return on assets	(6,076		)	(7,378		)	(8,518		)	—			—			—
Settlement loss	—			3,214			—			—			—			—
Special termination benefit recognized	—			3,831			—			—			—			—
Amortization of net loss (gain)	1,855			1,083			1,075			(75		)	(97		)	(60		)
Net expense (income)	$	1,745		$	6,274		$	(724	)	$	315		$	282		$	379

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year

The following table summarizes amounts in accumulated other comprehensive loss (gain) that are expected to be recognized as components of net periodic benefit cost for the year ending 2017.

	Defined Benefit Pension Plans		Post- Retirement Plans			Total
Actuarial loss (gain)	$	2,009	$	(54	)	$	1,955

Schedule of Amounts Recognized in Other Comprehensive Income (Loss)

As of December 31, 2016, accumulated other comprehensive (loss) income, before income taxes, consists of the following:

	Defined Benefit Pension Plans			Post- Retirement Plans			Total
Accumulated other comprehensive (loss) income as of January 1, 2016	$	(35,258	)	$	939		$	(34,319	)
Amortization of gain (loss)	1,855			(75		)	1,780
Net loss arising during the year	(2,511		)	(553		)	(3,064		)
Accumulated other comprehensive (loss) income as of December 31, 2016	$	(35,914	)	$	311		$	(35,603	)

As of December 31, 2015, accumulated other comprehensive (loss) income, before income taxes, consisted of the following:

	Defined Benefit Pension Plans			Post- Retirement Plans			Total
Accumulated other comprehensive (loss) income as of January 1, 2015	$	(30,481	)	$	582		$	(29,899	)
Amortization of gain (loss)	4,297			(97		)	4,200
Net (loss) gain arising during the year	(9,074		)	454			(8,620		)
Accumulated other comprehensive (loss) income as of December 31, 2015	$	(35,258	)	$	939		$	(34,319	)

Schedule of Assumptions Used

	Pension Benefits			Other Postretirement Benefits
	2016	2015	2014	2016	2015	2014
Weighted average assumptions:
Discount rates — benefit obligation	3.60% - 4.20%	3.75% - 4.50%	2.75% - 4.00%	4.40%	4.75%	4.25%
Discount rates — service cost	3.75% - 4.50%	2.75% - 4.25%	3.00% - 4.75%	4.75%	4.25%	5.00%
Assumed rates of return on invested assets	6.00%	6.00%	6.50%	—%	—%	—%
Salary increase assumptions	N/A	N/A	N/A	3.00%	3.00%	3.00%

Schedule of Allocation of Plan Assets

Vector’s defined benefit retirement plan allocations at December 31, 2016 and 2015, by asset category, were as follows:

	Plan Assets at December 31,
	2016		2015
Asset category:
Equity securities	54	%	51	%
Investment grade fixed income securities	30	%	30	%
High yield fixed income securities	10	%	11	%
Alternative investments	2	%	3	%
Short-term investments	4	%	5	%
Total	100	%	100	%

The defined benefit plans’ recurring financial assets subject to fair value measurements and the necessary disclosures are as follows:

	Fair Value Measurements as of December 31, 2016
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
Description	Total		(Level 1)		(Level 2)		(Level 3)
Assets:
Insurance contracts	$	1,765	$	—	$	1,765	$	—
Amounts in individually managed investment accounts:
Cash	4,302		4,302		—		—
U.S. equity securities	8,298		8,298		—		—
Common collective trusts	76,969		—		76,969		—
Investment partnership	12,447		—		10,457		1,990
Total	$	103,781	$	12,600	$	89,191	$	1,990

	Fair Value Measurements as of December 31, 2015
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
Description	Total		(Level 1)		(Level 2)		(Level 3)
Assets:
Insurance contracts	$	1,760	$	—	$	1,760	$	—
Amounts in individually managed investment accounts:
Cash, mutual funds and common stock	5,429		5,429		—		—
U.S. equity securities	28,434		28,434		—		—
Common collective trusts	56,327		—		56,327		—
Investment partnership	14,670		—		11,256		3,414
Total	$	106,620	$	33,863	$	69,343	$	3,414

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets

The changes in the fair value of the Level 3 investments as of December 31, 2016 and 2015 were as follows:

	2016			2015
Balance as of January 1	$	3,414		$	6,824
Distributions	(1,648		)	(2,904		)
Unrealized gain (loss) on long-term investments	16			(470		)
Realized gain (loss) on long-term investments	208			(36		)
Balance as of December 31	$	1,990		$	3,414

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates

A 1% change in assumed health care cost trend rates would have the following effects:

	1% Increase		1% Decrease
Effect on total of service and interest cost components	$	4	$	(4	)
Effect on benefit obligation	71		(67		)

Schedule of Expected Benefit Payments

Estimated future pension and postretirement medical benefits payments are as follows:

	Pension		Postretirement Medical
2017	$	9,187	$	621
2018	8,715		641
2019	8,210		637
2020	14,838		622
2021	7,225		618
2022 - 2026	80,902		3,015