Fair Value Measurements (Changes in Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Cumulative translation adjustments—net of tax	[1]		$ (57)		$ 1,304
Reclassification of derivative (gains) losses to earnings—net of tax		$ 295	(1,037)	$ 1,186	(1,769)
Change in fair value of derivatives—net of tax		(58)	910	1,791	908
Net change in cash flow derivative hedges—net of tax	[2]	237	(127)	2,977	(861)
Other comprehensive income—net of tax		$ 237	$ (184)	$ 2,977	$ 443

[1] Net of income tax (provision) benefit of $5 and $(530) for the three and six months ended June 30, 2018 respectively.

[2] Net of income tax benefit of $84 and income tax provision of $(689) for the three months ended June 30, 2019 and 2018, respectively. Net of income tax benefit of $1,055 and income tax provision of $(949) for the six months ended June 30, 2019 and 2018 respectively.