Other Noncurrent Assets (Schedule Of Other Noncurrent Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Other Noncurrent Assets [Abstract]
Investment in long-term product supply arrangements	$ 12,577	$ 13,075
Customer acquisition costs, net	20,781	21,199
Other assets	25,827	22,957
Other noncurrent assets, net	$ 59,185	$ 57,231