Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Schedule of Changes in Projected Benefit Obligation

The following tables set forth the changes in the projected benefit obligation and plan assets and reconciles the funded status and the amounts recognized in the Consolidated Balance Sheets for the defined benefit pension and postretirement plans for the two years ended December 31:

	Pension						Postretirement
Change in Projected Benefit Obligation	2017			2016			2017			2016
Projected benefit obligation at beginning of year	$	414,479		$	405,033		$	26,838		$	26,959
Plans assumed in Acquisition	710,466			—			18,884			—
Service cost	5,646			5,225			1,249			808
Interest cost	15,926			15,915			827			871
Actuarial loss (gain)	6,852			7,416			(1,639		)	(940		)
Participant contributions	96			—			396			335
Benefits paid	(23,192		)	(19,110		)	(1,386		)	(1,195		)
Effects of foreign currency exchange rates	8,904			—			280			—
Projected benefit obligation at end of year	$	1,139,177		$	414,479		$	45,449		$	26,838

Schedule of Changes in Fair Value of Plan Assets

Change in Plan Assets
Fair value of plan assets at beginning of year	$	275,955		$	266,155		$	—		$	—
Plans assumed in Acquisition	668,463			—			—			—
Actual return on plan assets	57,618			16,634			—			—
Employer contributions	12,732			12,276			990			860
Participant contributions	96			—			396			335
Benefits paid	(23,192		)	(19,110		)	(1,386		)	(1,195		)
Effects of foreign currency exchange rates	8,528			—			—			—
Fair value of plan assets at end of year	$	1,000,200		$	275,955		$	—		$	—

Schedule of Funded Status

Funded Status at end of year: $ (138,977 ) $ (138,524 ) $ (45,449 ) $ (26,838 )

Schedule of Amounts Recognized in Consolidated Balance Sheet

	Pension						Postretirement
Amounts recognized in the Consolidated Balance Sheets consist of:	2017			2016			2017			2016
Non-current assets	$	36,605		$	—		$	—		$	—
Current liabilities	(5,059		)	(2,293		)	(3,162		)	(1,340		)
Non-current liabilities	(170,523		)	(136,231		)	(42,287		)	(25,498		)
Net amount recognized	$	(138,977	)	$	(138,524	)	$	(45,449	)	$	(26,838	)

Schedule of Amounts Recognized in Other Comprehensive Income (Loss)

Net gains (losses) recognized in other comprehensive income for the three years ended December 31 are as follows:

	Pension								Postretirement
	2017		2016			2015			2017		2016		2015
Net gains (losses)	$	24,411	$	(14,101	)	$	(24,950	)	$	1,639	$	1,184	$	759

Net gains or losses and prior service costs or credits reclassified from other comprehensive income and recognized as a component of pension and postretirement expense for the three years ended December 31 are as follows:

	Pension						Postretirement
	2017		2016		2015		2017			2016			2015
Amortization of losses	$	11,651	$	11,343	$	13,434	$	333		$	238		$	676
Amortization of prior service (credit) cost	761		761		750		(151		)	(139		)	(158		)

Schedule of Net Periodic Benefit Cost Not yet Recognized

Net losses, prior service costs or credits and plan amendments that have not yet been included in pension and postretirement expense for the two years ended December 31, which have been recognized as a component of AOCL are as follows:

	Pension						Postretirement
	2017			2016			2017			2016
Prior service cost	$	(2,254	)	$	(3,015	)	$	—		$	(2	)
Net losses	(128,215		)	(164,277		)	(5,149		)	(7,121		)
Plan amendment	—			—			1,491			1,644
Deferred income tax benefit	50,907			60,684			1,582			2,007
AOCL	$	(79,562	)	$	(106,608	)	$	(2,076	)	$	(3,472	)

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

For defined benefit pension plans with accumulated benefit obligations in excess of plan assets, the following table sets forth the projected and accumulated benefit obligations and the fair value of plan assets for the years ended December 31:

	2017		2016
Projected benefit obligation	$	813,411	$	414,480
Accumulated benefit obligation	785,435		401,896
Fair value of plan assets	638,414		275,955

Schedule of Net Benefit Costs

The following tables set forth the components of net pension and postretirement benefit cost that have been recognized during the three years ended December 31:

	Pension									Postretirement
Components of Net Periodic Benefit Cost	2017			2016			2015			2017			2016			2015
Service cost	$	5,646		$	5,225		$	5,977		$	1,249		$	808		$	1,006
Interest cost	15,926			15,915			15,228			827			871			919
Expected return on plan assets	(25,978		)	(23,320		)	(23,234		)	—			—			—
Amortization of prior service (credit) cost	761			761			750			(151		)	(139		)	(158		)
Amortization of losses	11,651			11,343			13,434			333			238			676
Net periodic benefit cost (a)	$	8,006		$	9,924		$	12,155		$	2,258		$	1,778		$	2,443

(a) A portion of the net periodic benefit cost is recorded in cost of goods sold in the Consolidated Statements of Income.

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

The estimated pre-tax amounts that will be amortized from AOCL into net periodic benefit cost in 2018 are as follows:

	Pension		Postretirement
Amortization of loss	$	11,648	$	229
Amortization of prior service cost	572		(153		)
Total amortization of AOCL	$	12,220	$	76

Schedule of Assumptions Used

The following table sets forth the weighted average principal assumptions inherent in the determination of benefit obligations and net periodic benefit cost of the pension and postretirement benefit plans as of December 31:

	Pension						Postretirement
	2017		2016		2015		2017		2016		2015
Assumptions used to determine benefit obligations at December 31:
Discount rate	3.55	%	3.88	%	4.03	%	3.14	%	3.85	%	3.98	%
Rate of compensation increase	2.60	%	4.10	%	4.45	%	3.10	%	4.50	%	4.50	%
Assumptions used to determine net periodic benefit cost for years ended December 31:
Discount rate	3.77	%	4.03	%	3.71	%	3.64	%	3.98	%	3.65	%
Expected long-term return on plan assets	7.38	%	8.50	%	8.50	%	N/A		N/A		N/A
Rate of compensation increase	2.59	%	4.10	%	4.45	%	3.10	%	4.50	%	4.50	%

Schedule of Health Care Cost Trend Rates

The following table sets forth the assumed health care cost trend rates as of December 31:

	Postretirement
	2017				2016
	U.S.		Canada		U.S.
Health care cost trend rate assumed for next year	8.00	%	5.50	%	8.00	%
Rate to which the cost trend is assumed to decline (ultimate trend rate)	5.00	%	4.50	%	5.00	%
Year that ultimate trend rate is reached	2024		2019		2026

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

The following table shows the effect of a one percentage point change in assumed health care cost trends:

	1 Percent
Effect on:	Increase		Decrease
Total of service and interest cost components	$	237	$	(203	)
Accumulated postretirement benefit obligation	2,022		(1,772		)

Schedule of Allocation of Plan Assets

The Company’s weighted average defined benefit pension plan asset allocation at December 31, 2017 and 2016, by asset category are as follows:

	Percentage of Plan Assets
Asset Category	2017		2016
U.S. equity securities	23	%	41	%
International equity securities	27	%	24	%
U.S. fixed income securities	13	%	27	%
International fixed income securities	34	%	5	%
Other	3	%	3	%
Total	100	%	100	%

The following table sets forth by level, within the fair value hierarchy (see Note 1 — Nature of Operations and Basis of Presentationfor definition), the assets of the plans as of December 31, 2017 and 2016.

	Fair Value at December 31, 2017
Asset Category	Level 1		Level 2		Level 3		Total
Mutual funds	$	161,424	$	—	$	—	$	161,424
Investments at net asset value:
Common collective trust funds							838,776
Total assets at fair value							$	1,000,200

	Fair Value at December 31, 2016
Asset Category	Level 1		Level 2		Level 3		Total
Mutual funds	$	76,757	$	—	$	—	$	76,757
Investments at net asset value:
Common collective trust funds							199,198
Total assets at fair value							$	275,955

Schedule of Expected Benefit Payments

Expected benefit payments for the next ten years are as follows:

	Pension Benefits		Postretirement Benefits
2018	$	87,144	$	3,163
2019	89,291		3,035
2020	90,367		3,127
2021	91,580		3,014
2022	92,327		2,836
2023 — 2027	473,753		11,296