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Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Income Tax Contingency [Line Items]          
Net deferred tax assets $ 117,582,000   $ 117,582,000   $ 123,223,000
Valuation allowance related to net deferred tax assets 323,000   323,000   323,000
Provision for income taxes 19,098,000 $ 41,913,000 23,712,000 $ 57,403,000  
Liability for uncertain tax positions 0   0   0
Accrued Expenses And Other Liabilities [Member] | Weyerhaeuser [Member]          
Income Tax Contingency [Line Items]          
Income tax liability $ 8,600,000   $ 8,600,000   $ 8,600,000