Summary of Restricted Stock Award Activity (Detail) (Parenthetical) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental compensation expense		$ 4,277
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends payable to former CEO	[1]	62	$ 942	$ 386
Incremental compensation expense		2,374
Other Current Liabilities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends payable to former CEO		$ 296

[1] Approximately $296 of dividends were payable to the former CEO on December 31, 2021 and were paid in January 2022. These dividends were included in other current liabilities on the consolidated balance sheet as of December 31, 2021.