XML 50 R35.htm IDEA: XBRL DOCUMENT v3.20.2
Revenue - Schedule of Construction Services Contracts Receivable (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]    
Billed on completed contracts and contracts in progress $ 271,872 $ 216,268
Other receivables 5,214 8,456
Contracts receivable, gross 277,086 224,724
Allowance for doubtful accounts (1,488) (820)
Contracts receivable, net $ 275,598 $ 223,904