Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accrued Liabilities, Current [Abstract]
Sales rebates payable	$ 12,280	$ 16,622
Property taxes payable	2,039	4,011
Accrued salaries	6,446	7,924
SAR Liability	3,821	3,087
Other accrued liabilities	2,752	3,143
Total accrued liabilities	$ 27,338	$ 34,787	[1]

[1] The balance sheet at December 31, 2019, as presented, is derived from the audited financial statements at that date.