Summary of Significant Accounting Policies - Balances of Financial Instruments Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Interest rate swap, assets | $ 2,911 | $ 17,633 |
| Interest rate swap, liabilities | (24,471) | (1,820) |
| Fair Value, Measurements, Recurring | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Interest rate swap, assets | 2,911 | 17,633 |
| Interest rate swap, liabilities | (24,471) | (1,820) |
| Interest rate derivatives, at fair value, net | (21,560) | 15,813 |
| Fair Value, Measurements, Recurring | Level 2 | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Interest rate swap, assets | 2,911 | 17,633 |
| Interest rate swap, liabilities | (24,471) | (1,820) |
| Interest rate derivatives, at fair value, net | $ (21,560) | $ 15,813 |