Other Noncurrent Assets (Schedule Of Other Noncurrent Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Other Noncurrent Assets [Abstract]
Investment in long-term product supply arrangements	$ 10,825	$ 10,324
Customer acquisition costs, net	20,531	21,795
Other assets	22,126	18,942
Other long-term assets, net	$ 53,482	$ 51,061