Segment Information (Summary Of Information By Business Segment) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenues		$ 181,716	$ 199,897
Adjusted EBITDDA		28,252	64,732
Basis of real estate sold		1,556	3,605
Depreciation, depletion and amortization		15,797	12,196
Interest expense, net	[1]	(5,464)	(5,660)
Loss on extinguishment of debt		(5,512)
Non-operating pension and other postretirement employee benefits		(980)	(1,857)
Gain on fixed assets		32	4
Gain on sale of facility		9,176
Deltic merger-related costs	[2]		(19,255)
Income before income taxes		8,151	20,314
Bond discounts and deferred loan fees	[1]	477	439
Depreciation, depletion and amortization		16,274	12,635
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		206,628	226,876
Depreciation, depletion and amortization		15,797	12,196
Operating Segments [Member] | Resource [Member]
Segment Reporting Information [Line Items]
Revenues		68,158	76,506
Adjusted EBITDDA		26,850	37,697
Depreciation, depletion and amortization		10,265	8,646
Operating Segments [Member] | Wood Products [Member]
Segment Reporting Information [Line Items]
Revenues		132,306	139,815
Adjusted EBITDDA		7,226	28,950
Depreciation, depletion and amortization		5,042	3,354
Operating Segments [Member] | Real Estate Segment [Member]
Segment Reporting Information [Line Items]
Revenues		6,164	10,555
Adjusted EBITDDA		2,703	8,002
Basis of real estate sold		1,588	3,723
Depreciation, depletion and amortization		209	40
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	[3]	(24,912)	(26,979)
Adjusted EBITDDA		2,127	(1,201)
Basis of real estate sold		(32)	(118)
Corporate [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDDA		(10,654)	(8,716)
Depreciation, depletion and amortization		$ 281	156
Costs of Goods Sold [Member]
Segment Reporting Information [Line Items]
Inventory purchase price adjustment in cost of goods sold	[4]		$ (1,849)

[1] Bond discounts and deferred loan fees are reported within interest expense, net on the Condensed Consolidated Statement of Income.

[2] For integration and restructuring costs related to the merger with Deltic see Note 3: Merger with Deltic.

[3] Intersegment revenues represent logs sold by our Resource segment to the Wood Products segment.

[4] The effect on cost of goods sold for fair value adjustments to the carrying amounts of inventory acquired in the Deltic merger.