Postretirement Medical Benefits (Tables)

12 Months Ended

Dec. 31, 2018

Postretirement Medical Benefits [Abstract]

Components of Net Periodic Benefit Cost for Postretirement Benefit Plans

Net periodic benefit cost related to our plans includes the following components (in thousands):

	December 31,
U.S. postretirement plan:	2018			2017 (1)			2016 (1)
Service cost	$	—		$	—		$	—
Interest cost		6			8			11
Actuarial net (gain) loss		(268	)		(661	)		809
Net periodic benefit cost (credit)	$	(262	)	$	(653	)	$	820
Canadian postretirement plan:
Service cost	$	—		$	—		$	—
Interest cost		—			—			2
Amortization of prior service cost		—			—			(54	)
Actuarial net gain		—			—			(46	)
Net periodic benefit cost (credit)	$	—		$	—		$	(98	)
Total net periodic benefit cost (credit)	$	(262	)	$	(653	)	$	722

(1) Net periodic benefit cost (credit) has been reclassified from selling, general and administrative expenses to other non-operating income (expense), net on our consolidated statement of operations upon adoption of ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, see Note 1, “Summary of Significant Accounting Policies” for additional information.

Postretirement Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Funded (Unfunded) Status

The benefit obligation, funded status, and amounts recognized in the consolidated financial statements for our postretirement medical benefit plan as of and for the years ended December 31, 2018 and 2017, were as follows (in thousands):

	Postretirement
	Benefit Plan
	U.S. Plan
	2018			2017
Change in benefit obligation:
Benefit obligation at beginning of year	$	672		$	1,574
Service cost		—			—
Interest cost		6			8
Benefits paid		(201	)		(429	)
Actuarial gain		(247	)		(481	)
Benefit obligation at end of year	$	230		$	672
(Unfunded) status of the plan	$	(230	)	$	(672	)

Amounts Recognized in Balance Sheet

The benefit obligation as of December 31, 2018 relates solely to postretirement medical and dental benefits to the 20 eligible former union employees in the U.S.

	Postretirement
	Benefit Plan
	U.S. Plan
	2018			2017
Amounts recognized in the balance sheet:
Accrued postretirement benefit liabilities	$	230		$	672
Accumulated other comprehensive (income) loss (pre-tax) related to:
Unrecognized net actuarial losses (gains)		(173	)		(194	)

Expected Future Benefit Payments

The following benefit payments which reflect expected future service, as appropriate, are expected to be paid (in thousands):

2019	$	39
2020		36
2021		32
2022		29
2023		25
Years 2024 – 2028		76