Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 41,165	$ (31,081)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization	13,343	16,474
Basis of real estate sold	5,772	5,421
Change in deferred taxes	1,244	(6,784)
Pension and other postretirement employee benefits	6,575	7,830
Equity-based compensation expense	2,348	2,176
Loss on sale of central Idaho timber and timberlands		48,522
Other, net	(983)	(1,280)
Change in working capital and operating-related activities, net	9,919	4,383
Net cash from operating activities	79,383	45,661
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property, plant and equipment	(5,939)	(3,488)
Timberlands reforestation and roads	(5,792)	(5,544)
Acquisition of timber and timberlands	(3,132)	(1,161)
Net proceeds from sale of central Idaho timber and timberlands		111,460
Other, net	(74)	109
Net cash from investing activities	(14,937)	101,376
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends to common stockholders	(30,457)	(30,453)
Repayment of revolving line of credit borrowings		(30,000)
Repayment of long-term debt	(5,000)	(47,600)
Proceeds from issuance of long-term debt		27,500
Repurchase of common stock		(5,956)
Other, net	(1,249)	(3,075)
Net cash from financing activities	(36,706)	(89,584)
Change in cash and cash equivalents	27,740	57,453
Cash and cash equivalents at beginning of period	82,584	7,925
Cash and cash equivalents at end of period	110,324	65,378
Cash paid (received) during the period for:
Interest, net of amounts capitalized	11,735	13,791
Income taxes, net	$ 4,857	$ (1,740)