Fair Value Measurements (Changes In Components Of Accumulated Other Comprehensive (Income) Loss) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Cumulative translation adjustments—net of tax	[1]	$ (28)	$ 409
Reclassification of derivative losses to earnings—net of tax		40
Change in fair value of derivatives—net of tax		(774)
Net unrealized gain on derivatives—net of tax	[2]	(734)
Other comprehensive income (loss)—net of tax		$ (762)	$ 409

[1] Net of income tax (provision) benefit of $39 and $(271) for the three months ended March 31, 2017 and 2016, respectively.

[2] Net of income tax provision of $479 for the three months ended March 31, 2017.