CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Shares	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interests in Consolidated Affiliates
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment due to adoption of ASU No. 2018-02	$ 1,692,940	$ 0	$ 872,228	$ 707,378	$ 711	$ 13,417	$ (711)	$ 99,917
Beginning balance (in shares) at Dec. 31, 2017			128,970,776
Beginning balance at Dec. 31, 2017	1,692,940	0	$ 872,228	707,378	711	13,417	(711)	99,917
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment due to adoption of ASU No. 2018-02	1,654,550	$ 0	$ 884,263	672,371	$ 711	239	$ (711)	97,677
Net income (loss)	117,330			102,216				15,114
Net income attributable to noncontrolling interest in the Operating Partnership	0
Dividends	(137,934)			(137,934)
Issuance of shares under incentive stock plans, (in shares)			599,422
Issuance of shares under incentive stock plans	8,591		$ 8,591
Stock-based compensation	6,428		$ 6,428
Repurchase of common shares, (in shares)			(81,523)
Repurchase of common shares	(2,984)		$ (2,984)
Actuarial change and amortization of pension and postretirement plan liabilities	(919)					(919)
Foreign currency translation adjustment	(22,759)					(17,329)		(5,430)
Cash flow hedges	5,029					5,781		(752)
Distributions to noncontrolling interests in consolidated affiliates	(11,172)							(11,172)
Ending balance (in shares) at Dec. 31, 2018			129,488,675
Ending balance at Dec. 31, 2018	1,654,550		$ 884,263	672,371		239		97,677
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment due to adoption of ASU No. 2018-02	1,654,550		884,263	672,371		239		97,677
Cumulative-effect adjustment due to adoption of ASU No. 2018-02	1,654,550		$ 888,177	583,006		(31,202)		97,661
Net income (loss)	67,678			59,105				8,573
Net income attributable to noncontrolling interest in the Operating Partnership	0
Dividends	(140,040)			(140,040)
Issuance of shares under incentive stock plans, (in shares)			298,003
Issuance of shares under incentive stock plans	1,260		$ 1,260
Stock-based compensation	6,904		$ 6,904
Repurchase of common shares, (in shares)			(455,609)
Repurchase of common shares	(12,680)		$ (4,250)	(8,430)
Actuarial change and amortization of pension and postretirement plan liabilities	(1,350)					(1,350)
Foreign currency translation adjustment	963					784		179
Cash flow hedges	(30,482)					(30,875)		393
Distributions to noncontrolling interests in consolidated affiliates	(9,161)							(9,161)
Ending balance (in shares) at Dec. 31, 2019			129,331,069
Ending balance at Dec. 31, 2019	1,537,642		$ 888,177	583,006		(31,202)		97,661
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment due to adoption of ASU No. 2018-02	1,537,642		888,177	583,006		(31,202)		97,661
Cumulative-effect adjustment due to adoption of ASU No. 2018-02	1,862,645		$ 1,101,675	446,267		(31,202)		388,588
Issuances of shares associated with the merger with Pope Resources (in shares)			7,181,071
Issuances of shares associated with the merger with Pope Resources	172,418		$ 172,418
Net income (loss)	29,784			37,612				(7,828)
Net income attributable to noncontrolling interest in the Operating Partnership	(528)			(528)
Dividends	(146,278)			(146,278)
Issuance of shares under the “at-the-market” equity offering, net of commissions and offering costs of $799 (in shares)			1,103,012
Issuance of shares under the “at-the-market” equity offering, net of commissions and offering costs of $799	32,574		$ 32,574
Issuance of shares under incentive stock plans, (in shares)			266,036
Issuance of shares under incentive stock plans	1,589		$ 1,589
Stock-based compensation	8,026		$ 8,026
Repurchase of common shares, (in shares)			(219,619)
Repurchase of common shares	(4,757)		$ (1,605)	(3,152)
Acquisition of noncontrolling interests in consolidated affiliates	333,366							333,366
Adjustment of noncontrolling interest in the Operating Partnership	(24,393)			(24,393)
Conversion of units into common shares (in shares)			17,253
Conversion of units into common shares	496		$ 496
Actuarial change and amortization of pension and postretirement plan liabilities	(925)					(925)
Foreign currency translation adjustment	28,272					22,928		5,344
Cash flow hedges	(61,055)					(62,146)		1,091
Allocation of other comprehensive income to noncontrolling interests in the Operating Partnership	(2,540)					(2,540)
Distributions to noncontrolling interests in consolidated affiliates	(12,643)							(12,643)
Noncontrolling interests in consolidated affiliates redemption of shares	(28,403)							(28,403)
Ending balance (in shares) at Dec. 31, 2020			137,678,822
Ending balance at Dec. 31, 2020	1,862,645		$ 1,101,675	446,267		(73,885)		388,588
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment due to adoption of ASU No. 2018-02	$ 1,862,645		$ 1,101,675	$ 446,267		$ (73,885)		$ 388,588