Assets Held for Sale - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2021 USD ($) Property	Mar. 31, 2020 USD ($)
Long Lived Assets Held For Sale [Line Items]
Number of Properties | Property	3
Proceeds from sale of property	$ 27,211,000	$ 14,218,000
Irvine, California Property [Member]
Long Lived Assets Held For Sale [Line Items]
Proceeds from sale of property		$ 14,218,000
Other Current Assets [Member]
Long Lived Assets Held For Sale [Line Items]
Proceeds from sale of property	$ 27,211,000