Fair Value Measurements (Changes in Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Cumulative translation adjustments—net of tax	[1]	$ 1,513	$ (41)	$ 508
Reclassification of derivative (gains) losses to earnings—net of tax		(1,569)	(218)	30
Change in fair value of derivatives—net of tax		(3,756)	1,407	300
Net unrealized (gain) loss on derivatives—net of tax	[2]	(5,325)	1,189	330
Other comprehensive income (loss)—net of tax		$ (3,812)	$ 1,148	$ 838

[1] Net of income tax (provision) benefit of (1,017), $44 and (338) for the years ended December 31, 2018, 2017 and 2016, respectively.

[2] Net of income tax benefit of $775, $1,048 and $216 for the years ended December 31, 2018, 2017 and 2016, respectively.