Equity - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Cumulative foreign currency translation adjustment	$ (6,955)	$ (22,817)
Unrealized gains (losses) on cash flow hedges, net	(13,950)	(3,642)
Supplemental Executive Retirement plan minimum liability and other	(3,119)	(3,183)
Total accumulated other comprehensive loss	$ (24,024)	$ (29,642)