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Summary of Significant Accounting Policies - Schedule of Impact of Adoption of ASU 2018-15 on Condensed Consolidated Statement of Income and Cash Flows (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Summary Of Significant Accounting Policy [Line Items] |  |  |  |  |  |
Net income | $ 752 | $ (9,969) | $ 3,995 | $ 770 | $ (9,217) | $ 4,765
Net cash provided by operating activities |  |  |  |  | $ 1,681 | 11,007
ASU 2018-15 [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |  |  |  |
Net income |  |  | 3,995 |  |  | 4,765
Net cash provided by operating activities |  |  |  |  |  | 11,007
Pre-Adoption [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |  |  |  |
Net income |  |  | $ 3,995 |  |  | 4,765
Net cash provided by operating activities |  |  |  |  |  | $ 11,007

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