Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 31,714	$ 89,910	$ 70,581
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization	38,105	26,749	26,962
Basis of real estate sold	7,012	8,646	2,904
Change in deferred taxes	(5,696)	(1,616)	(2,467)
Employee benefit plans	4,986	2,122	7,561
Equity-based compensation expense	4,758	4,137	4,377
Other, net	(2,046)	(2,191)	(1,972)
Change in:
Receivables	(3,864)	7,016	(5,904)
Inventories	(3,672)	4,785	(7,347)
Other assets	898	(1,421)	1,668
Accounts payable and accrued liabilities	267	(2,388)	(3,468)
Funding of qualified pension plans	0	(3,550)	0
Timber deposits and cost share roads	1,552	(827)	(2,643)
Net cash from operating activities	74,014	131,372	90,252
CASH FLOWS FROM INVESTING ACTIVITIES
Change in short-term investments	26,329	25,883	10,826
Transfer from company owned life insurance (COLI)	1,492	28,870	0
Transfer to COLI	0	(25,515)	0
Property, plant and equipment	(18,987)	(13,261)	(10,280)
Timberlands reforestation and roads	(13,745)	(10,971)	(12,313)
Acquisition of timber and timberlands	(10,230)	(388,952)	(1,060)
Other, net	886	1,263	823
Net cash from investing activities	(14,255)	(382,683)	(12,004)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends to common stockholders	(61,017)	(57,848)	(51,868)
Revolving line of credit borrowings	30,000	0	0
Repayment of long-term debt	(22,500)	0	(36,663)
Proceeds from issuance of long-term debt	0	310,000	0
Issuance of common stock	0	398	1,904
Change in book overdrafts	(1,549)	1,465	(955)
Employee tax withholdings on vested performance share awards	(1,453)	(1,104)	(1,738)
Deferred financing costs	(45)	(2,388)	(25)
Other, net	47	(154)	(302)
Net cash from financing activities	(56,517)	250,369	(89,647)
Increase (decrease) in cash	3,242	(942)	(11,399)
Cash at beginning of year	4,644	5,586	16,985
Cash at end of year	7,886	4,644	5,586
Cash paid during the year for:
Interest, net of amounts capitalized	29,676	20,918	22,229
Income taxes, net	$ 1,576	$ 18,104	$ 20,097