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Organization and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands | Jan. 01, 2019 | Sep. 30, 2019
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Organization And Summary Of Significant Accounting Policies [Line Items] |  |
Right-of-use (ROU) assets |  | $ 61,987
Operating lease liabilities |  | $ 82,641
ASU 2016-02 (Topic 842) |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |
Right-of-use (ROU) assets | $ 50,000 |
Operating lease liabilities | 70,900 |
Derecognition of deferred rent for certain lease incentives received | 20,900 |
Recognition of Deferred Gain on Sale of Real Estate | ASU 2016-02 (Topic 842) |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |
Deferred gain on sale of real estate as cumulative-effect adjustment to equity | $ 8,000 |

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