Segment Information (Summary Of Information By Business Segment) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Segment Revenues		$ 163,229	$ 141,495	$ 312,910	$ 269,391
Operating income (loss)		40,773	(34,228)	64,682	(29,156)
Interest expense, net		(7,348)	(8,206)	(12,318)	(14,231)
Income (loss) before income taxes		33,425	(42,434)	52,364	(43,387)
Depreciation, depletion and amortization		6,641	7,869	13,343	16,474
Bond discounts and deferred loan fees		370	468	743	834
Basis of real estate sold		982	3,387	5,772	5,421
Operating Segments [Member]
Segment Reporting Information [Line Items]
Segment Revenues		178,589	155,704	340,453	293,218
Operating income (loss)		51,003	(24,031)	84,318	(9,328)
Depreciation, depletion and amortization		6,113	7,188	12,325	15,219
Operating Segments [Member] | Resource [Member]
Segment Reporting Information [Line Items]
Segment Revenues		55,924	54,826	107,692	103,536
Operating income (loss)		19,520	15,672	34,449	25,879
Depreciation, depletion and amortization		4,274	5,387	8,658	11,515
Operating Segments [Member] | Wood Products [Member]
Segment Reporting Information [Line Items]
Segment Revenues		114,529	90,924	210,121	174,162
Operating income (loss)		24,705	4,695	33,389	5,651
Depreciation, depletion and amortization		1,839	1,800	3,666	3,701
Operating Segments [Member] | Real Estate [Member]
Segment Reporting Information [Line Items]
Segment Revenues		8,136	9,954	22,640	15,520
Operating income (loss)	[1]	5,725	(43,429)	14,368	(41,354)
Depreciation, depletion and amortization			1	1	3
Basis of real estate sold		1,047	3,509	5,856	5,754
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Segment Revenues	[2]	(15,360)	(14,209)	(27,543)	(23,827)
Operating income (loss)		1,053	(969)	2,112	496
Basis of real estate sold		(65)	(122)	(84)	(333)
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income (loss)		(10,230)	(10,197)	(19,636)	(19,828)
Depreciation, depletion and amortization		$ 158	$ 213	$ 275	$ 421

[1] In the second quarter of 2016, we sold approximately 172,000 acres of timberlands located in central Idaho for $114 million at a loss of $48.5 million before taxes.

[2] Intersegment revenues are based on prevailing market prices of logs sold by our Resource segment to the Wood Products segment.