XML 112 R57.htm IDEA: XBRL DOCUMENT v3.20.1
Revenue Recognition - Additional Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Revenue from Contract with Customer [Abstract]                
Accounts receivable, net of allowances $ 115,099 $ 153,190 $ 157,193 $ 158,327 $ 133,935 $ 150,507 $ 150,576 $ 141,821