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Schedule of Distributions Declared (Detail) - USD ($) $ in Thousands						3 Months Ended
		Mar. 31, 2023	Mar. 02, 2023	Mar. 31, 2022	Mar. 03, 2022	Mar. 31, 2023	Mar. 31, 2022
Dividends Payable [Line Items]
Approval Date			Mar. 02, 2023		Mar. 03, 2022
Record Date			Mar. 24, 2023		Mar. 21, 2022
Payment Date			Mar. 31, 2023		Mar. 31, 2022
Payment of dividends				$ 3,597		$ 3,346	$ 3,647
Payment of dividends		$ 3,410
Unvested Shares, Net of Forfeitures
Dividends Payable [Line Items]
Approval Date	[1]					Various	Various
Record Date	[1]					Various	Various
Payment Date	[1]					Various	Various
Payment of dividends	[1]					$ (64)
Payment of dividends	[1]						$ 50
[1] Represents distributions declared on unvested shares, net of forfeitures.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 505
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