Retirement Plans (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 contract	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan Number			5
Description of Postemployment Benefits			The Company sponsors five 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	$ 776	$ 585	$ 2,082	$ 1,769
Salaried Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	672	478	1,751	1,422
Union Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	20	18	59	53
Canadian Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan Number			2
Post-retirement benefit plan number			1
United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Number			1
Defined Contribution Plan Number			1
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year			292
Defined Benefit Plan, Contributions by Employer			219
Defined Contribution Plan, Cost Recognized	32	27	100	95
United States Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of retirement plans			5
Defined Benefit Plan Number			3
Active Defined Benefit Plan Number			1
Inactive Defined Benefit Plan Number			2
Defined Contribution Plan Number			2
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			408
Defined Benefit Plan, Contributions by Employer			$ 300