Pension Plans and Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2017

UNITED STATES

Pension Plans and Postretirement Benefits [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Net periodic benefit expense for the United States plans:

	For the three months ended March 31, 2017									For the three months ended March 31, 2016
	Pension benefits			Other benefits			Total			Pension benefits			Other benefits			Total
Service cost	$	—		$	34		$	34		$	—		$	46		$	46
Interest cost	25			31			56			29			44			73
Expected return on assets	(35		)	—			(35		)	(36		)	—			(36		)
Amortization of
prior service cost	—			—			—			—			—			—
unrecognized (gain) loss	—			(50		)	(50		)	2			(13		)	(11		)
net transition obligation	—			—			—									—
Net periodic cost	$	(10	)	$	15		$	5		$	(5	)	$	77		$	72

CANADA

Pension Plans and Postretirement Benefits [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Net periodic benefit expense for the Canadian plans:

	For the three months ended March 31, 2017								For the three months ended March 31, 2016
	Pension benefits			Other benefits		Total			Pension benefits			Other benefits		Total
Service cost	$	94		$	13	$	107		$	87		$	12	$	99
Interest cost	127			13		140			118			12		130
Expected return on assets	(201		)	—		(201		)	(185		)	—		(185		)
Amortization of
actuarial loss (gain)	43			—		43			50			—		50
prior service cost	27			—		27			25			—		25
net transition obligation	—			6		6			—			6		6
Exchange rate changes	(48		)	14		(34		)	(288		)	78		(210		)
Net periodic cost	$	42		$	46	$	88		$	(193	)	$	108	$	(85	)