Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2016

Defined Benefit Plan Disclosure [Line Items]

Schedule of Costs of Retirement Plans [Table Text Block]

		March 31,
		2016		2015
United States	$	691	$	682
Canada		50		59
United Kingdom		58		83
	$	799	$	824

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,
		2016		2015
Service cost	$	9	$	10
Interest cost		186		185
Expected return on plan assets		(179)		(204)
Recognized net actuarial loss		69		69
Net periodic pension cost	$	85	$	60

United Kingdom Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

		Three Months Ended
		March 31,
		2016		2015
Interest cost	$	75	$	76
Expected return on plan assets		(84)		(83)
Amortization of prior service costs and transition amount		5		5
Recognized net actuarial loss		39		58
Net periodic pension cost	$	35	$	56