Change in Method of Accounting for Inventory Valuation - Additional Information (Detail) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Percentage of LIFO inventory			68.00%
Retained earnings	[1],[2]	$ 922,464	$ 837,107
Effect of Change [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Retained earnings		$ (20,642)	$ 23,659

[1] The 2019 amounts for the noted line items include an adjustment related to the Company’s first quarter 2019 adoption of Accounting Standards Update (ASU) No. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive income.

[2] The 2018 amounts for the noted line items have been retrospectively changed from the amounts originally reported as a result of the Company’s first quarter 2019 change in method of accounting for U.S. inventory valuation from LIFO to FIFO.