Consolidated Condensed Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM CONTINUING OPERATIONS
Net income	$ 42,594	$ 40,266	$ 40,394
Adjustments to reconcile net earnings to net operating cash flows from continuing operations:
Depreciation, depletion and amortization	26,247	29,092	31,204
Basis of real estate sold	5,048	10,219	48,670
Change in deferred taxes	15,992	4,218	5,427
Loss (gain) on disposition of property, plant and equipment	(8)	(131)	1,078
Employee benefit plans	4,317	(2,181)	(6,241)
Equity-based compensation expense	4,067	4,404	3,952
Asset impairment charge	107	1,180	0
Gain from discontinued operations	0	0	(119)
Proceeds from land sales deposited with a like-kind exchange intermediary	0	0	(341)
Income tax benefit related to stock issued in conjunction with stock compensation plans	525	0	0
Other, net	1,478	365	42
Funding of qualified pension plans	(21,630)	(9,400)	0
Decrease (increase) in receivables	2,865	7,745	(3,117)
Increase in inventories	(325)	(4,228)	(385)
Decrease (increase) in prepaid expenses	(1,459)	(8)	455
Increase (decrease) in accounts payable and accrued liabilities	163	(4,116)	5,096
Net cash provided by operating activities from continuing operations	79,981	77,425	126,115
CASH FLOWS FROM INVESTING
Decrease (increase) in short-term investments	(88)	22,260	(31,743)
Proceeds from company owned life insurance (COLI) loan	21,751	0	0
Additions to property, plant and equipment	(5,636)	(5,338)	(5,215)
Additions to timber and timberlands	(23,552)	(11,548)	(9,786)
Proceeds from disposition of property, plant and equipment	71	224	3,075
Other, net	(1,193)	(1,095)	(1,807)
Net cash provided by (used for) investing activities from continuing operations	(8,647)	4,503	(45,476)
CASH FLOWS FROM FINANCING
Distributions to common stockholders	(50,041)	(73,921)	(81,578)
Repayment of long-term debt	(21,662)	(5,011)	(11)
Proceeds from issuance of long-term debt	12,000	0	0
Issuance of common stock	1,075	1,430	2,156
Change in book overdrafts	462	157	2,178
Deferred financing costs	(2,148)	(698)	(249)
Employee tax withholdings on vested performance share awards	(1,714)	(1,641)	(2,075)
Other, net	(140)	(18)	(1)
Net cash used for financing activities from continuing operations	(62,168)	(79,702)	(79,580)
Cash flows provided by continuing operations	9,166	2,226	1,059
Cash flows provided by discontinued operations	0	0	3,002
Increase in cash	9,166	2,226	4,061
Cash at beginning of year	7,819	5,593	1,532
Cash at end of year	16,985	7,819	5,593
Cash paid (received) during the year for:
Interest, net of amount capitalized	23,884	25,241	26,135
Income taxes, net	53	(5,984)	255
Non-cash investing activity:
Additions to timber and timberlands	$ 586	$ 341	$ 0