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Summary of Restricted Stock and Restricted Stock Unit Award Activity (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock unit awards that vested during the period	115,712
Fair value of restricted shares that vested during the period	$ 2,491	$ 8,944
Compensation expense recognized during the period	13,757	8,235
Income tax benefit (cost) related to restricted stock awards	$ (105)	$ 2,678
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock unit awards that vested during the period	15,230	120,293
Fair value of restricted shares that vested during the period	$ 314	$ 3,669
Accumulated dividends paid upon vesting of restricted stock unit awards	62	576
Compensation expense recognized during the period	2,832	4,624
Income tax benefit (cost) related to restricted stock awards	$ (467)	$ 215

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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