Retirement Plans (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 contract
Defined Benefit Plan Disclosure [Line Items]
Number of retirement plans	7
Defined Benefit Plan Number	3
Active Defined Benefit Plan Number	1
Inactive Defined Benefit Plan Number	2
Defined Contribution Plan Number	4
Description of Postemployment Benefits	The Company sponsors seven defined contribution plans for hourly and salaried employees across our domestic and international facilities. The following table summarizes the expense associated with the contributions made to these plans.
United States Defined Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	0
Canadian Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan Number	2
United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	270
Defined Benefit Plan, Contributions by Employer	69