Segment Information (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) region	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of geographic regions where products are sold | region			4
Total sales	$ 301,791	$ 312,711	$ 591,304	$ 597,385
Property and equipment, net	264,146		264,146		$ 264,086
Outside The United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total sales	185,000	$ 200,000	364,000	$ 379,000
Property and equipment, net	$ 145,000		$ 145,000		$ 145,000