Related Party Transactions - Additional Information (Detail) $ in Millions	Mar. 31, 2021 USD ($)
Related Party Transaction [Line Items]
Preferred stock, accumulated dividends	$ 1.7
Affiliate of LSB Funding [Member]
Related Party Transaction [Line Items]
Principal amount of notes hold	$ 50.0

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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