XML 91 R77.htm IDEA: XBRL DOCUMENT v3.8.0.1
Receivables - Narrative (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Allowance for financing notes $ 2,800 $ 7,700    
Government Insured Loans Claims [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Allowance for financing notes $ 57,593 $ 53,340 $ 41,438 $ 53,258