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Organization and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	Jan. 01, 2019	Sep. 30, 2019
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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Derecognition of deferred rent for lease incentives received.

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Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

+ References

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Present value of lessee's discounted obligation for lease payments from operating lease.

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