Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 14,597	$ 16,921
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization	12,635	6,702
Basis of real estate sold	3,605	4,790
Real estate development expenditures	(608)
Change in deferred taxes	(1,058)	(351)
Pension and other postretirement employee benefits	3,814	3,771
Equity-based compensation expense	3,094	1,157
Other, net	(542)	(1,007)
Funding of qualified pension plans	(8,098)
Change in working capital and operating-related activities, net	7,475	9,966
Net cash from operating activities	34,914	41,949
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property, plant and equipment	(3,632)	(3,636)
Timberlands reforestation and roads	(2,860)	(2,645)
Other, net	232	(102)
Cash and cash equivalents acquired in Deltic merger	3,419
Net cash from investing activities	(2,841)	(6,383)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends to common stockholders	(25,102)	(15,228)
Proceeds from Potlatch revolving line of credit	100,000
Repayment of Potlatch revolving line of credit	(100,000)
Revolving line of credit repayment attributable to Deltic	(106,000)
Proceeds from issue of long-term debt	100,000
Repayment of long-term debt	(14,250)
Debt issuance costs	(2,409)
Other, net	(2,429)	(1,258)
Net cash from financing activities	(50,190)	(16,486)
Change in cash and cash equivalents	(18,117)	19,080
Cash and cash equivalents at beginning of period	120,457	82,584
Cash and cash equivalents at end of period	102,340	101,664
Cash paid (received) during the period for:
Interest, net of amounts capitalized	4,979	3,130
Income taxes, net	(113)	$ 148
Deltic [Member]
NONCASH INVESTING AND FINANCING ACTIVITIES
Equity issued as consideration for our merger with Deltic	$ 1,142,775