Long-term Debt - Schedule of Debt (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019
Debt Instrument [Line Items]
Notes payable maturity date	2025-03
Minimum [Member]
Debt Instrument [Line Items]
Notes payable Interest rate	4.00%
Maximum [Member]
Debt Instrument [Line Items]
Notes payable Interest rate	6.00%
Term Loan Agreement [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 1,592	$ 1,662
Vehicle and Equipment [Member]
Debt Instrument [Line Items]
Notes payable maturity date	2025-03
Vehicle and Equipment [Member] | Minimum [Member]
Debt Instrument [Line Items]
Notes payable Interest rate	2.50%
Vehicle and Equipment [Member] | Maximum [Member]
Debt Instrument [Line Items]
Notes payable Interest rate	4.80%
5.75% Senior Notes Due 2028 [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 4,678	$ 4,823
Notes payable Interest rate			5.75%