Long-term Debt - Schedule of Debt (Parenthetical) (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Mar. 31, 2019 |
Dec. 31, 2018 |
|
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 | $ 4,642 | $ 4,834 |
Vehicle and Equipment [Member] | ||
Debt Instrument [Line Items] | ||
Notes payable maturity date | 2024-03 | |
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% |