Pension Plans and Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2014

US [Member]

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 June 30, 2014									For the three months ended June 30, 2013
	Pension benefits			Other benefits			Total			Pension benefits			Other benefits		Total
Service cost	$	—		$	78		$	78		$	—		$	91	$	91
Interest cost	31			43			74			27			40		67
Expected return on assets	(31		)	—			(31		)	(27		)	—		(27		)
Amortization of
prior service cost	—			—			—			—			—		—
unrecognized (gain) loss	—			(10		)	(10		)	14			—		14
Net periodic cost	$	—		$	111		$	111		$	14		$	131	$	145
	For the six months ended June 30, 2014									For the six months ended June 30, 2013
	Pension benefits			Other benefits			Total			Pension benefits			Other benefits		Total
Service cost	$	—		$	156		$	156		$	—		$	182	$	182
Interest cost	61			87			148			$	54		$	81	$	135
Expected return on assets	(61		)	—			(61		)	$	(55	)	$	—	$	(55	)
Amortization of
prior service cost	—			—			—			$	—		$	—	$	—
unrecognized (gain) loss	—			(20		)	(20		)	$	28		$	—	$	28
Net periodic cost	$	—		$	223		$	223		$	27		$	263	$	290

Canada [Member]

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 June 30, 2014								For the three months ended June 30, 2013
	Pension benefits			Other benefits		Total			Pension benefits			Other benefits			Total
Service cost	$	80		$	17	$	97		$	88		$	19		$	107
Interest cost	145			21		166			140			20			160
Expected return on assets	(234		)	—		(234		)	(226		)	—			(226		)
Amortization of
actuarial loss (gain)	25			4		29			79			9			88
prior service cost	23			—		23			25			—			25
net transition obligation	—			7		7			—			8			8
Exchange rate changes	(244		)	53		(191		)	94			(21		)	73
Net periodic cost	$	(205	)	$	102	$	(103	)	$	200		$	35		$	235
	For the six months ended June 30, 2014								For the six months ended June 30, 2013
	Pension benefits			Other benefits		Total			Pension benefits			Other benefits			Total
Service cost	$	159		$	34	$	193		$	177		$	39		$	216
Interest cost	287			43		330			282			41			323
Expected return on assets	(466		)	—		(466		)	(456		)	—			(456		)
Amortization of
actuarial loss (gain)	50			7		57			160			18			178
prior service cost	47			—		47			51			—			51
net transition obligation	—			14		14			—			15			15
Exchange rate changes	(25		)	6		(19		)	204			(47		)	157
Net periodic cost	$	52		$	104	$	156		$	418		$	66		$	484