Consolidated Statements of Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues		$ 974,579	$ 678,595	$ 599,099
Costs and expenses:
Cost of goods sold		707,645	469,393	460,600
Selling, general and administrative expenses		59,861	49,996	44,262
Deltic merger-related costs	[1]	22,119	3,409
Environmental charges for Avery Landing			4,978	1,022
Gain on lumber price swap			(1,088)
Loss on sale of central Idaho timber and timberlands	[2]			48,522
Total costs and expenses		789,625	526,688	554,406
Operating income		184,954	151,907	44,693
Interest expense, net		(35,227)	(27,049)	(28,941)
Non-operating pension and other postretirement employee benefit costs		(7,648)	(6,384)	(9,139)
Income before income taxes		142,079	118,474	6,613
Income tax (provision) benefit		(19,199)	(32,021)	4,325
Net income		$ 122,880	$ 86,453	$ 10,938
Net income per share:
Basic (in dollars per share)		$ 2.03	$ 2.12	$ 0.27
Diluted (in dollars per share)		1.99	2.10	0.27
Dividends/Special distribution per share		$ 1.60	$ 1.525	$ 1.50
Weighted-average shares outstanding (in thousands)
Basic (in shares)		60,533,615	40,824,420	40,797,806
Diluted (in shares)		61,813,719	41,227,388	41,033,440
Deltic [Member]
Revenues		$ 265,252
Costs and expenses:
Income before income taxes		$ 21,638
Net income per share:
Dividends/Special distribution per share		$ 3.54

[1] See Note 18: Merger, Integration and other costs.

[2] 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.