Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2015

Defined Benefit Plan Disclosure [Line Items]

Schedule of Costs of Retirement Plans [Table Text Block]

		2015		2014
United States	$	682	$	573
Canada		59		64
United Kingdom		83		38
	$	824	$	675

United States Defined Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

		Three Months Ended
		March 31,
		2015		2014
Service cost	$	10	$	6
Interest cost		185		193
Expected return on plan assets		(204)		(242)
Recognized net actuarial loss		69		16
Net periodic pension cost (income)	$	60	$	(27)

United Kingdom Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

		Three Months Ended
		March 31,
		2015		2014
Interest cost	$	76	$	99
Expected return on plan assets		(83)		(94)
Amortization of prior service costs and transition amount		5		(7)
Recognized net actuarial loss		58		50
Net periodic pension cost	$	56	$	48