Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2016

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,
		2016		2015		2016		2015
United States	$	152	$	413	$	1,289	$	1,842
Canada		46		54		164		167
United Kingdom		64		162		281		360
	$	262	$	629	$	1,734	$	2,369

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,
		2016		2015		2016		2015
Service cost	$	9	$	10	$	27	$	29
Interest cost		186		185		559		555
Expected return on plan assets		(179)		(203)		(538)		(611)
Recognized net actuarial loss		69		69		207		207
Net periodic pension cost	$	85	$	61	$	255	$	180

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,
		2016		2015		2016		2015
Interest cost	$	73	$	78	$	223	$	231
Expected return on plan assets		(82)		(83)		(250)		(249)
Amortization of prior service costs and transition amount		5		5		15		15
Recognized net actuarial loss		38		60		116		177
Net periodic pension cost	$	34	$	60	$	104	$	174