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Supplemental Information - Summary of Components of Interest, Net (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Interest expense	$ (360)	$ (372)
Interest income	14	(26)
Total	$ (346)	$ (398)

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Amount of the cost of borrowed funds accounted for as interest expense.

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The net amount of nonoperating interest income (expense).

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Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities.

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