Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 122,880	$ 86,453	$ 10,938
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization		73,161	29,912	34,190
Basis of real estate sold		16,698	6,827	8,011
Change in deferred taxes		12,161	15,364	1,853
Pension and other postretirement employee benefits		16,443	13,151	15,661
Equity-based compensation expense		8,206	4,722	4,390
Loss on sale of central Idaho timber and timberlands	[1]			48,522
Other, net		(1,221)	(1,872)	(1,198)
Change in working capital, net of business acquired:
Receivables, net		2,822	3,602	(3,712)
Inventories, net		273	2,490	(17,460)
Other assets		(3,996)	(15)	(473)
Accounts payable and accrued liabilities		(5,212)	11,591	7,232
Other liabilities		(6,173)	(4,291)	(4,537)
Real estate development expenditures		(5,049)
Funding of qualified pension plans		(52,099)	(5,275)	(1,300)
Net cash provided by operating activities		178,894	162,659	102,117
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant and equipment		(29,880)	(12,855)	(5,866)
Timberlands reforestation and roads		(17,378)	(15,207)	(13,422)
Acquisition of timber and timberlands		(4,877)	(22,043)	(1,244)
Net proceeds from sale of central Idaho timber and timberlands				111,460
Cash and cash equivalents acquired in merger		3,419
Transfer from company owned life insurance (COLI)		1,796	1,278	6,384
Transfer to COLI		(1,027)	(1,324)	(3,967)
Other, net		38	131	6
Net cash (used in) provided by investing activities		(47,909)	(50,020)	93,351
CASH FLOWS FROM FINANCING ACTIVITIES
Distributions to common stockholders		(146,768)	(61,931)	(60,842)
Repurchase of common stock				(5,956)
Proceeds from Potlatch revolving line of credit		100,000
Repayment of revolving line of credit		(100,000)		(30,000)
Proceeds from issuance of long-term debt		100,000		93,235
Repayment of long-term debt		(14,250)	(11,000)	(113,335)
Other, net		(4,983)	(1,835)	(3,911)
Net cash used in financing activities		(172,001)	(74,766)	(120,809)
Change in cash, cash equivalents and restricted cash		(41,016)	37,873	74,659
Cash, cash equivalents and restricted cash at beginning of period		120,457	82,584	7,925
Cash, cash equivalents and restricted cash at end of period		79,441	120,457	82,584
Cash paid (received) during the year for:
Interest, net of amounts capitalized		34,490	26,125	28,051
Income taxes, net		10,800	$ 15,845	$ (8,081)
Deltic [Member]
CASH FLOWS FROM FINANCING ACTIVITIES
Repayment of revolving line of credit		$ (106,000)

[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.