Commitments and Contingencies - Cash Deposit Rates on Account of Countervailing and Anti-dumping Duties (Detail)		1 Months Ended		4 Months Ended	6 Months Ended	8 Months Ended	11 Months Ended		12 Months Ended			13 Months Ended		14 Months Ended	37 Months Ended
	Oct. 28, 2026	Sep. 10, 2025	Sep. 06, 2023	Nov. 07, 2017	Nov. 07, 2017	Aug. 08, 2022	Jul. 28, 2025	Aug. 18, 2024	Aug. 11, 2025	Jul. 31, 2023	Dec. 01, 2021	Oct. 18, 2026	Aug. 18, 2024	Oct. 18, 2026	Nov. 30, 2020	Nov. 29, 2020
Countervailing Duties [Member]
Commitments And Contingencies [Line Items]
Percentage of preliminary determination countervailing duty rate on certain canadian softwood lumber imported to the US market					12.82%
Percentage of final determination countervailing duty rate on certain canadian softwood lumber imported to the US market						18.07%			6.74%	10.10%	19.10%		1.79%		14.70%
Countervailing Duties [Member] \| Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Percentage of final determination countervailing duty rate on certain canadian softwood lumber imported to the US market	12.42%													14.63%
Anti-dumping Duties [Member]
Commitments And Contingencies [Line Items]
Percentage of preliminary determination anti dumping rate on certain canadian softwood lumber imported to the US market				4.59%
Percentage of final determination anti dumping rate on certain canadian softwood lumber imported to the US market		20.56%	6.20%			11.59%	7.66%	6.26%		4.76%	1.15%					3.20%
Anti-dumping Duties [Member] \| Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Percentage of final determination anti dumping rate on certain canadian softwood lumber imported to the US market	13.13%											20.53%