Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2017

Defined Benefit Plan Disclosure [Line Items]

Schedule of Costs of Retirement Plans [Table Text Block]

		Three Months Ended
		March 31,
		2017		2016
United States	$	451	$	691
Canada		59		50
United Kingdom		115		58
	$	625	$	799

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
		March 31,
		2017		2016
Service cost	$	-	$	9
Interest cost		171		186
Expected return on plan assets		(178)		(179)
Recognized net actuarial loss		33		69
Net periodic pension cost	$	26	$	85

United Kingdom Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

		Three Months Ended
		March 31,
		2017		2016
Interest cost	$	55	$	75
Expected return on plan assets		(65)		(84)
Amortization of prior service costs and transition amount		4		5
Recognized net actuarial loss		69		39
Net periodic pension cost	$	63	$	35