Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss, Net of Tax(Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2015	$ (395,899)
Other comprehensive income (loss) before reclassification	899
Amounts reclassified from accumulated other comprehensive income (loss)	431
Net current period other comprehensive income (loss)	1,330
Ending balance, June 30, 2016	(373,828)
Loss on Cash Flow Hedge
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2015	(4,022)
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, 2016	(3,591)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2015	(4,756)
Other comprehensive income (loss) before reclassification	899
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	899
Ending balance, June 30, 2016	(3,857)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2015	(8,778)
Ending balance, June 30, 2016	$ (7,448)