Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2015

Defined Benefit Plan Disclosure [Line Items]

Schedule of Costs of Retirement Plans [Table Text Block]

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2015		2014		2015		2014
United States	$	413	$	692	$	1,842	$	1,810
Canada		54		52		167		172
United Kingdom		162		32		360		100
	$	629	$	776	$	2,369	$	2,082

United States Pension Plans of US Entity, Defined Benefit [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2015		2014		2015		2014
Service cost	$	10	$	5	$	29	$	17
Interest cost		185		193		555		578
Expected return on plan assets		(203)		(242)		(611)		(726)
Recognized net actuarial loss		69		16		207		49
Net periodic pension cost (income)	$	61	$	(28)	$	180	$	(82)

United Kingdom Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2015		2014		2015		2014
Interest cost	$	78	$	97	$	231	$	297
Expected return on plan assets		(83)		(92)		(249)		(281)
Amortization of prior service costs and transition amount		5		(7)		15		(21)
Recognized net actuarial loss		60		49		177		149
Net periodic pension cost	$	60	$	47	$	174	$	144