Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2014			$ (6,971)
Other comprehensive income (loss) before reclassification	$ 175	$ 509	(1,272)	$ 1,030
Amounts reclassified from accumulated other comprehensive income (loss)	216	216	431	431
Net current period other comprehensive income (loss)	391	$ 725	(841)	$ 1,461
Ending balance, June 30, 2015	(7,812)		(7,812)
Loss on Cash Flow Hedge [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2014			(4,884)
Other comprehensive income (loss) before reclassification			0
Amounts reclassified from accumulated other comprehensive income (loss)			431
Net current period other comprehensive income (loss)			431
Ending balance, June 30, 2015	(4,453)		(4,453)
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2014			(2,087)
Other comprehensive income (loss) before reclassification			(1,272)
Amounts reclassified from accumulated other comprehensive income (loss)			0
Net current period other comprehensive income (loss)			(1,272)
Ending balance, June 30, 2015	(3,359)		(3,359)
Interest Expense [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Interest rate contract	216		431
Income tax benefit (expense) [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Tax (expense) benefit	$ 0		$ 0