Pension Plans and Postretirement Benefits (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 78,000	$ 91,000	$ 156,000	$ 182,000
Defined Benefit Plan, Interest Cost	74,000	67,000	148,000	135,000
Defined Benefit Plan, Expected Return on Plan Assets	(31,000)	(27,000)	(61,000)	(55,000)
Defined Benefit Plan, Amortization of Gains (Losses)	(10,000)	14,000	(20,000)	28,000
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	111,000	145,000	223,000	290,000
Employer Contributions			200,000
Defined Contribution Plan, Employer Discretionary Contribution Amount			2,900,000
Canada [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	97,000	107,000	193,000	216,000
Defined Benefit Plan, Interest Cost	166,000	160,000	330,000	323,000
Defined Benefit Plan, Expected Return on Plan Assets	(234,000)	(226,000)	(466,000)	(456,000)
Defined Benefit Plan, Amortization of Gains (Losses)	29,000	88,000	57,000	178,000
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	23,000	25,000	47,000	51,000
Defined Benefit Plan, Other Costs	7,000	8,000	14,000	15,000
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(191,000)	73,000	(19,000)	157,000
Defined Benefit Plan, Net Periodic Benefit Cost	(103,000)	235,000	156,000	484,000
Employer Contributions			400,000
Pension Benefits [Member] | US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	0	0	0	0
Defined Benefit Plan, Interest Cost	31,000	27,000	61,000	54,000
Defined Benefit Plan, Expected Return on Plan Assets	(31,000)	(27,000)	(61,000)	(55,000)
Defined Benefit Plan, Amortization of Gains (Losses)	0	14,000	0	28,000
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	0	14,000	0	27,000
Pension Benefits [Member] | Canada [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	80,000	88,000	159,000	177,000
Defined Benefit Plan, Interest Cost	145,000	140,000	287,000	282,000
Defined Benefit Plan, Expected Return on Plan Assets	(234,000)	(226,000)	(466,000)	(456,000)
Defined Benefit Plan, Amortization of Gains (Losses)	25,000	79,000	50,000	160,000
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	23,000	25,000	47,000	51,000
Defined Benefit Plan, Other Costs	0	0	0	0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(244,000)	94,000	(25,000)	204,000
Defined Benefit Plan, Net Periodic Benefit Cost	(205,000)	200,000	52,000	418,000
Other Benefits [Member] | US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	78,000	91,000		182,000
Defined Benefit Plan, Interest Cost	43,000	40,000	87,000	81,000
Defined Benefit Plan, Expected Return on Plan Assets	0	0	0	0
Defined Benefit Plan, Amortization of Gains (Losses)	(10,000)	0	(20,000)	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	156,000	0
Defined Benefit Plan, Net Periodic Benefit Cost	111,000	131,000	223,000	263,000
Other Benefits [Member] | Canada [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	17,000	19,000	34,000	39,000
Defined Benefit Plan, Interest Cost	21,000	20,000	43,000	41,000
Defined Benefit Plan, Expected Return on Plan Assets	0	0	0	0
Defined Benefit Plan, Amortization of Gains (Losses)	4,000	9,000	7,000	18,000
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Defined Benefit Plan, Other Costs	7,000	8,000	14,000	15,000
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	53,000	(21,000)	6,000	(47,000)
Defined Benefit Plan, Net Periodic Benefit Cost	$ 102,000	$ 35,000	$ 104,000	$ 66,000