European Non-Controlling Redeemable Equity - Summary of Redeemable Noncontrolling Interests (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Redeemable Noncontrolling Interest [Line Items]
Dividends accrued	$ 96	$ 106	$ 134	$ 152
Redeemable Noncontrolling Interest [Member]
Redeemable Noncontrolling Interest [Line Items]
Beginning balance			1,666	$ 6,525	$ 6,525
Dividends accrued			134		205
Dividends paid			(3)		(46)
Translation adjustment			(156)		2
Purchase of shares			(89)		(5,020)
Ending Balance	$ 1,552		$ 1,552		$ 1,666

- 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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