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Stock-Based Compensation (Detail) - (Table 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Total	$ 5,521	$ 5,937	$ 11,207	$ 11,608
Restricted Stock [Member]
Allocated Share-based Compensation Expense	4,627	4,938	9,491	9,555
Stock Options [Member]
Allocated Share-based Compensation Expense	$ 894	$ 999	$ 1,716	$ 2,053

X

- Definition

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

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