XML 93 R76.htm IDEA: XBRL DOCUMENT v3.10.0.1
Business Segment Information (Schedule of Revenues And Assets Based On Location) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Revenues $ 405,057 $ 408,682 $ 404,830 $ 405,598 $ 408,219 $ 386,018 $ 372,331 $ 359,984 $ 1,624,167 $ 1,526,552 $ 1,401,545
Assets 1,971,668       1,853,369       1,971,668 1,853,369  
United States                      
Revenues                 1,348,130 1,298,381 1,191,640
Assets 1,612,202       1,471,260       1,612,202 1,471,260  
International operations                      
Revenues                 276,037 228,171 $ 209,905
Assets $ 359,466       $ 382,109       $ 359,466 $ 382,109