Other Current and Noncurrent Assets (Schedule Of Other Noncurrent Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Current and Noncurrent Assets [Abstract]
Investment in long-term product supply arrangements	$ 12,165	$ 10,765
Customer acquisition costs, net	43,570	28,165
Other assets	29,755	32,724
Total other long-term assets, net	$ 85,490	$ 71,654