Debt Obligations (Details) (USD $) In Thousands, unless otherwise specified			9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Revolving Credit Facility [Member]	Sep. 30, 2014 Short-term Debt, Type [Domain]	Sep. 30, 2014 Capital Lease Obligations [Member]	Sep. 30, 2014 Term Loan A [Member]	Sep. 30, 2014 Total debt [Member]
Total Debt [Roll Forward]
Revolving Credit Facility	$ 296,471	$ 129,010
Other Debt	4,737	2,403
Capital Lease Obligations	4,224	5,233
Term Loan A	73,125	68,000
Total Debt and Capital Lease Obligations	378,557	204,646
Other Debt, Current	(4,737)
Capital Lease Obligations, Current	(2,332)	(2,361)
Term Loan A, Current	(4,686)
Total Debt and Capital Lease, Current	(11,755)
Revolving Credit Facility, Noncurrent	296,471
Capital Lease Obligations, Noncurrent	1,892	2,872
Term Loan A, Noncurrent	68,439
Total Debt and Capital Lease, Noncurrent	366,802
Net borrowings (repayments)			182,625	2,778	(1,028)	5,125	189,500
Capital Leases Interest					227		227
Foreign currency exchange gain			$ (15,164)	$ (444)	$ (208)	$ 0	$ (15,816)