XML 59 R42.htm IDEA: XBRL DOCUMENT v3.10.0.1
Revenue from Contracts with Customers - Commission Asset Balances (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Jan. 01, 2018
Revenue from Contract with Customer [Abstract]    
Commission asset, current $ 1,480 $ 704
Commission asset, noncurrent $ 4,692 $ 2,819