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Derivative and Hedging Activities - Additional Information (Detail) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2020 USD ($) Swap | Sep. 30, 2020 USD ($) Swap | Sep. 30, 2019 USD ($)
Term Loan [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Number of swaps | Swap | 2 | 2 |
Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified |  | $ 0 | $ 0
Interest Expense [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Amortization of unrealized loss | $ 600,000 | 600,000 |
Interest Rate Swap [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Unrealized loss included in accumulated other comprehensive loss associated with the terminated swaps |  | 12,900,000 |
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Reclassification from accumulated other comprehensive income to interest expense |  | 3,400,000 |
Interest Rate Swap [Member] | Cash Flow Hedging [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional amount maturity date | Apr. 15, 2030 |  |
Aggregate cash payments on swap termination | $ 17,800,000 |  |
Unrealized loss included in accumulated other comprehensive loss associated with the terminated swaps | 17,800,000 |  |
Notional amount of derivative instruments | $ 200,000,000.0 | $ 200,000,000.0 |
Interest rate of Derivative instruments | 0.51% | 0.51% |

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