Stock Transactions and Unit Redemptions - Summary of Changes in Carrying Amount of FPUs (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Stock Transactions Parenthetical Disclosures [Abstract]
Balance at beginning of period	$ 23,638	$ 24,706
Consolidated net income allocated to FPUs	815	1,942
Earnings distributions	(815)	(1,942)
FPUs exchanged	(1,682)	(980)
FPUs redeemed	(1,282)	(88)
Balance at end of period	$ 20,674	$ 23,638

- Definition

Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

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