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Stock-Based Compensation (Detail) - (Table 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Total	$ 5,677	$ 5,732	$ 16,696	$ 16,939
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	1,846,567		1,846,567
Restricted Stock [Member]
Allocated Share-based Compensation Expense	$ 4,596	4,647	$ 13,541	14,138
Stock Options [Member]
Allocated Share-based Compensation Expense	$ 1,081	$ 1,085	$ 3,155	$ 2,801

X

- Definition

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

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