Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss, Net of Tax(Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2015	$ (395,899)
Other comprehensive income (loss) before reclassification	1,036
Amounts reclassified from accumulated other comprehensive income (loss)	646
Net current period other comprehensive income (loss)	1,682
Ending balance, September 30, 2016	(337,442)
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)	646
Net current period other comprehensive income (loss)	646
Ending balance, September 30, 2016	(3,376)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2015	(4,756)
Other comprehensive income (loss) before reclassification	1,036
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	1,036
Ending balance, September 30, 2016	(3,720)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2015	(8,778)
Ending balance, September 30, 2016	$ (7,096)