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	10 Months Ended	11 Months Ended			12 Months Ended			13 Months Ended	37 Months Ended
	Apr. 14, 2026	Sep. 10, 2025	Sep. 06, 2023	Nov. 07, 2017	Nov. 07, 2017	Aug. 08, 2022	Jun. 30, 2026	Jun. 30, 2026	Jul. 28, 2025	Aug. 18, 2024	Aug. 11, 2025	Jul. 31, 2023	Dec. 01, 2021	Aug. 18, 2024	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	11.70%				12.82%
Percentage of final determination countervailing duty rate on certain canadian softwood lumber imported to the US market						18.07%		14.63%			6.74%	10.10%	19.10%	1.79%	14.70%
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	13.25%			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%	20.53%		7.66%	6.26%		4.76%	1.15%			3.20%