Income Taxes - Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current taxes:
U.S. Federal	$ (299)	$ (5,948)	$ 5,684
State	4,599	1,656	58
Foreign	2,250	2,247	2,271
Total current tax expense (benefit)	6,550	(2,045)	8,013
Deferred taxes:
U.S. Federal	(10,368)	(1,430)	(6,028)
State	(5,368)	3,850	(214)
U.S. federal and foreign valuation allowance	2,066	(592)	2,263
Foreign	(1,852)	522	(5,582)
Total deferred tax expense (benefit)	(15,522)	2,350	(9,561)
Total income tax expense (benefit)	$ (8,972)	$ 305	$ (1,548)