XML 63 R51.htm IDEA: XBRL DOCUMENT v3.5.0.2
Segment Information (Schedule Of Revenue From Unaffiliated Customers By Product And Service) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Revenue $ 156,362 $ 151,574 $ 467,028 $ 482,800
Operating Segments [Member] | Products [Member]        
Revenue 56,484 52,899 163,301 183,790
Operating Segments [Member] | Materials [Member]        
Revenue 38,059 34,848 117,105 108,356
Operating Segments [Member] | Services [Member]        
Revenue $ 61,819 $ 63,827 $ 186,622 $ 190,654