v3.20.2

Summary of Significant Accounting Policies - Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | Jun. 30, 2020 | Mar. 31, 2020 | Feb. 07, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Interest rate swap, liabilities | $ (85,678) |  |  | $ (24,471)
Earnout liability | (37,975) | $ (44,296) | $ (40,119) | 0
Interest rate swap, assets | 0 |  |  | 2,911
Fair Value, Measurements, Recurring |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Interest rate swap, liabilities | (85,678) |  |  | (24,471)
Earnout liability | (37,975) |  |  |
Interest rate swap, assets |  |  |  | 2,911
Fair Value, Measurements, Recurring | Level 2 |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Interest rate swap, liabilities | (85,678) |  |  | (24,471)
Interest rate swap, assets |  |  |  | $ 2,911
Fair Value, Measurements, Recurring | Fair Value Inputs Level3 [Member] |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Earnout liability | $ (37,975) |  |  |

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