Retirement Plans (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) contract	Jun. 30, 2014 USD ($)
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.
Defined Contribution Plan, Cost Recognized | $	$ 917	$ 631	$ 1,741	$ 1,306
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 | $			$ 283
Defined Benefit Plan, Contributions by Employer | $			146
Defined Contribution Plan, Cost Recognized | $	$ 115	$ 30	198	$ 68
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year | $			$ 0