Deltic Timber (DEL) 10-K 4 Mar 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 26, 2016	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Trading Symbol	DEL
Entity Registrant Name	DELTIC TIMBER CORP
Entity Central Index Key	1,022,469
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		12,149,339
Entity Public Float			$ 276,949,207

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 5,429	$ 2,761
Trade accounts receivable - net	6,995	9,087
Inventories	11,917	11,494
Prepaid expenses and other current assets	6,392	5,897
Total current assets	30,733	29,239
Investment in real estate held for development and sale	58,418	56,139
Timber and timberlands - net	361,856	364,410
Property, plant, and equipment - net	85,495	74,164
Deferred charges and other assets	2,665	3,180
Total assets	539,167	527,132
Current liabilities
Current maturities of long-term debt	39,917	0
Trade accounts payable	8,837	6,814
Accrued taxes other than income taxes	2,118	2,149
Deferred revenues and other accrued liabilities	7,607	7,223
Total current liabilities	58,479	16,186
Long-term debt	183,836	202,863
Deferred tax liabilities - net	525	1,102
Other noncurrent liabilities	$ 42,359	$ 39,340
Commitments and contingencies
Stockholders' equity
Cumulative preferred stock - $.01 par, authorized 20,000,000 shares, none issued
Common stock - $.01 par, authorized 50,000,000 shares, 12,813,879 shares issued	$ 128	$ 128
Capital in excess of par value	87,822	86,575
Retained earnings	201,959	204,327
Treasury stock	(24,347)	(11,978)
Accumulated other comprehensive loss	(11,594)	(11,411)
Total stockholders' equity	253,968	267,641
Total liabilities and stockholders' equity	$ 539,167	$ 527,132

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Cumulative preferred stock, par value	$ 0.01	$ 0.01	$ 0.01
Cumulative preferred stock, shares authorized	20,000,000	20,000,000	20,000,000
Cumulative preferred stock, shares issued	0	0	0
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000	50,000,000
Common stock, shares issued	12,813,879	12,813,879	12,813,879

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net sales	$ 193,851	$ 227,355	$ 199,702
Costs and expenses
Cost of sales	144,489	156,135	130,752
Depreciation, amortization, and cost of fee timber harvested	21,096	18,342	15,131
General and administrative expenses	18,468	18,482	19,037
Total costs and expenses	184,053	192,959	164,920
Other income - business interruption claim	516	0	0
Gain on involuntary conversion	704	0	881
Operating income	11,018	34,396	35,663
Equity in earnings of Del-Tin Fiber	0	0	1,084
Interest income	4	5	13
Interest and other debt expense, net of capitalized interest	(7,526)	(5,430)	(4,578)
Gain on bargain purchase	0	0	3,413
Other income	258	284	3,229
Income before income taxes	3,754	29,255	38,824
Income taxes	(1,100)	(9,593)	(12,632)
Net income	$ 2,654	$ 19,662	$ 26,192
Earnings per common share
Basic	$ 0.21	$ 1.56	$ 2.06
Assuming dilution	0.21	1.55	2.05
Dividends declared per common share	$ 0.40	$ 0.40	$ 0.40
Weighted average common shares outstanding (thousands of shares)
Basic	12,407	12,497	12,566
Assuming dilution	12,467	12,553	12,624

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 2,654	$ 19,662	$ 26,192
Items related to employee benefit plans:
Net gain/(loss) arising during period (net of tax)	(1,084)	(8,895)	10,973
Reclassification adjustment for gains/(losses) included in net income (net of tax):
Amortization of prior service credit	2	6	4
Amortization of actuarial losses	927	278	568
Amortization of plan amendment	(28)	(121)	(121)
Net change in other comprehensive income/(loss)	(183)	(8,732)	11,424
Comprehensive income	$ 2,471	$ 10,930	$ 37,616

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities
Net income	$ 2,654	$ 19,662	$ 26,192
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation, amortization, and cost of fee timber harvested	21,096	18,342	15,131
Stock-based compensation expense	3,324	3,238	2,797
Deferred income taxes	(918)	(1,253)	241
Real estate development expenditures	(7,424)	(3,625)	(3,982)
Real estate costs recovered upon sale	4,646	4,972	2,711
Timberland costs recovered upon sale	486	174	827
Equity in earnings of Del-Tin Fiber	0	0	(1,084)
Gain on previously held equity interest	0	0	(3,165)
Gain on bargain purchase	0	0	(3,413)
Net increase in liabilities for pension and other postretirement benefits	3,794	1,251	1,931
Decrease/(increase) in operating working capital other than cash and cash equivalents	2,907	(9,174)	5,883
Other changes in assets and liabilities	(904)	(2,060)	(1,927)
Net cash provided by operating activities	29,661	31,527	42,142
Investing activities
Capital expenditures requiring cash, excluding real estate development	(28,385)	(15,969)	(19,396)
Timberland acquisition expenditures requiring cash	(824)	(118,203)	(8,919)
Business acquisition, net of cash acquired	0	0	(5,170)
Net change in purchased stumpage inventory	(817)	768	(1,486)
Advances to Del-Tin Fiber			(1,025)
Proceeds from involuntary conversion	1,590	0	881
Repayments from Del-Tin Fiber			781
Net change in funds held by trustee	(1)	0	7
Other - net	555	1,105	535
Net cash required by investing activities	(27,882)	(132,299)	(33,792)
Financing activities
Proceeds from borrowings	129,000	120,000	12,000
Repayments of notes payable and long-term debt	(108,000)	(7,000)	(14,000)
Treasury stock purchases	(15,266)	(7,866)	(2,224)
Common stock dividends paid	(5,022)	(5,055)	(5,080)
Proceeds from stock option exercises	1,198	253	760
Excess tax benefits from stock-based compensation expense	36	160	408
Other - net	0	(606)	(688)
Deferred financing costs	(1,057)	(727)	(765)
Net cash provided/(required) by financing activities	889	99,159	(9,589)
Net increase/(decrease) in cash and cash equivalents	2,668	(1,613)	(1,239)
Cash and cash equivalents at January 1	2,761	4,374	5,613
Cash and cash equivalents at December 31	$ 5,429	$ 2,761	$ 4,374

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred stock [Member]	Common stock [Member]	Capital in excess of par value [Member]	Retained earnings [Member]	Treasury Stock [Member]	Accumulated other comprehensive loss [Member]
Balance at beginning of year at Dec. 31, 2012			$ 128	$ 82,597	$ 168,608	$ (5,000)	$ (14,103)
Exercise of stock options				123
Shares purchased - 251,038; 131,947; and 36,314 shares, respectively						(2,224)
Net income	$ 26,192				26,192
Net change in other comprehensive income/(loss), net of income taxes							11,424
Stock-based compensation expense				2,797
Common stock dividends declared					(5,080)
Restricted stock awards	(935)			(935)
Tax effect on stock awards				173
Forfeited restricted stock - 1,476; none; and 570 shares, respectively				41		(41)
Shares issued for incentive plans - 54,064; 34,766; and 44,249 shares, respectively						1,572
Balance at end of period at Dec. 31, 2013	$ 266,272		128	84,796	189,720	(5,693)	(2,679)
Dividends declared per common share	$ 0.40
Exercise of stock options				(37)
Shares purchased - 251,038; 131,947; and 36,314 shares, respectively						(7,866)
Net income	$ 19,662				19,662
Net change in other comprehensive income/(loss), net of income taxes							(8,732)
Stock-based compensation expense				3,238
Common stock dividends declared					(5,055)
Restricted stock awards	(1,290)			(1,290)
Tax effect on stock awards				(132)
Shares issued for incentive plans - 54,064; 34,766; and 44,249 shares, respectively						1,581
Balance at end of period at Dec. 31, 2014	$ 267,641		128	86,575	204,327	(11,978)	(11,411)
Dividends declared per common share	$ 0.40
Exercise of stock options				(116)
Shares purchased - 251,038; 131,947; and 36,314 shares, respectively						(15,266)
Net income	$ 2,654				2,654
Net change in other comprehensive income/(loss), net of income taxes							(183)
Stock-based compensation expense				3,324
Common stock dividends declared					(5,022)
Restricted stock awards	(1,677)			(1,678)
Tax effect on stock awards				(377)
Forfeited restricted stock - 1,476; none; and 570 shares, respectively				94		(94)
Shares issued for incentive plans - 54,064; 34,766; and 44,249 shares, respectively						2,991
Balance at end of period at Dec. 31, 2015	$ 253,968		$ 128	$ 87,822	$ 201,959	$ (24,347)	$ (11,594)
Dividends declared per common share	$ 0.40

Consolidated Statements of Sto8

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Cumulative preferred stock, par value	$ 0.01	$ 0.01	$ 0.01
Cumulative preferred stock, shares authorized	20,000,000	20,000,000	20,000,000
Cumulative preferred stock, shares issued	0	0	0
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000	50,000,000
Common stock, shares issued	12,813,879	12,813,879	12,813,879
Treasury stock shares, balance at beginning of period	231,790	134,609	141,974
Treasury stock, shares purchased	251,038	131,947	36,314
Forfeited restricted stock	1,476	0	570
Treasury stock, shares issued for incentive plans	54,064	34,766	44,249
Treasury stock shares, balance at end of period	430,240	231,790	134,609

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies	Note 1 – Significant Accounting Policies Description of Business Business Environment Principles of Consolidation Business Combinations Use of Estimates Cash Equivalents Accounts Receivable and Allowance for Doubtful Accounts Inventories Investment in Del-Tin Fiber Investment in Real Estate Held for Development and Sale Timber and Timberlands The Company classifies its timberlands and fee timber as either strategic or non-strategic. Strategic timberlands, including pine forest and pine plantations, are prime pine sawtimber-growing platforms located within or immediately adjacent to the Company sawmills’ operating regions. Deltic manages these acres using modern silviculture methods to achieve optimal volume and quality of its pine sawtimber. The Company harvests pine sawtimber and pine pulpwood in accordance with its harvest plans and generally converts pine sawtimber into lumber in its own sawmills and sells pine pulpwood, hardwood pulpwood, and hardwood sawtimber in the market. Upon harvest, strategic timberlands are reforested. The Company’s timberland acquisition program is focused on the acquisition of pine-growing timberland in its current operating regions. This investment in strategic fee timber is a “productive asset,” and any occasional sale of strategic timberland or any expenditure to acquire such timber and timberlands is included in and classified as an investing activity in the Company’s consolidated statements of cash flows. The Company has legacy hardwood and other acreage which cannot be harvested for conversion in Company sawmills, reforested as pine plantations, or managed efficiently using modern silviculture methods either due to the size of the tract or lack of proximity to other Deltic fee timberlands. These timberlands have been identified as non-strategic and/or higher and better use timberlands and are expected to be sold over time. The Company considers these sales to be an operating activity of its Woodlands segment. In order to acquire and sell assets, primarily timberlands, in a tax efficient manner, the Company enters into tax-deferred, like-kind exchange (“LKE”) transactions when possible. The Company generally enters into forward transactions, in which property is sold and the proceeds are reinvested by acquiring similar property, and reverse transactions, in which property is acquired and similar property is subsequently sold. A qualified LKE intermediary is used to facilitate LKE transactions. Proceeds from forward LKE transactions are held by the intermediary and are classified as restricted cash, because the funds must be reinvested in similar properties. If the acquisition of suitable LKE properties is not completed within 180 days of the sale of the Company-owned property, the proceeds are distributed to Deltic by the intermediary and are reclassified as available cash, and applicable income taxes are determined. Amounts deposited with a third party towards the potential future purchase of property are included in deferred charges and other assets in the consolidated balance sheets and as an investing activity as changes in funds held by trustee in the consolidated statements of cash flows. The Company had $1,000 of proceeds from land sales deposited with an LKE intermediary at December 31, 2015 and none at December 31, 2014. An exchange accommodation titleholder, a type of variable interest entity, is used to facilitate reverse like-kind exchanges. The acquired assets are held by the exchange accommodation titleholder until the exchange transactions are complete. If the Company determines that it is the primary beneficiary of the exchange accommodation titleholder, Deltic includes the assets held by the exchange accommodation titleholder in timber and timberlands assets on the consolidated balance sheets and recognizes any income or expense attributed to the property in the consolidated income statements. Property, Plant, and Equipment Property, plant, and equipment assets are evaluated for possible impairment on a specific asset basis or in groups of similar assets, as applicable, whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future net cash flows to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment loss is recognized for the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of are reported at the lower of the carrying amount or fair value less costs to sell, and depreciation ceases. Revenue Recognition Revenue from the leasing of land for hunting purposes is deferred when received and subsequently recognized over the one-year lease term, which begins September 1 of each year. At December 31, 2015 and 2014, the Company had deferred hunting lease revenue totaling $2,060,000 and $2,009,000, respectively, reflected in the consolidated balance sheets in deferred revenues and other accrued liabilities. Revenue from mineral lease rental payments is deferred when received and recognized ratably over the lease term. At December 31, 2015 and 2014, the Company had deferred mineral lease revenue of $446,000 and $1,140,000, respectively, of which $115,000 and $383,000 were included in other noncurrent liabilities for 2015 and 2014, respectively, and $331,000 and $757,000 were included in other current liabilities, respectively. Mineral royalty payments are recognized when received. Revenue from sales of timberland and real estate is recorded when the sale is closed and legal title is transferred and the buyer’s initial and continuing investment is adequate, which is generally at the time the purchaser executes the real estate closing documents and makes payment to the title company handling the closing. Income Taxes Property Taxes Share-Based Compensation Pensions and Other Postretirement Benefits The Company also sponsors a defined benefit health care plan and a life insurance benefit plan for all eligible retired employees, excluding employees of the subsidiaries. The Company measures the costs of its obligations for these plans based on its health care cost trends and actuarial assumptions, including discount rates, mortality rates, assumed rates of return, compensation increases, and turnover rates. The Company reviews its assumptions on an annual basis and makes modifications to the assumptions based on current rates and trends when it is appropriate to do so. The effect of modifications to those assumptions is recorded in accumulated other comprehensive income/(loss) and amortized to net periodic cost over future periods using the corridor method. The Company believes that the assumptions utilized in recording its obligations under its plans are reasonable based on its experience and market conditions. Net periodic costs are recognized as employees render the services necessary to earn these post- retirement benefits. (For additional information, see Note 17 – Employee and Retiree Benefit Plans.) Advertising Costs Capitalized Interest Timberland Acquisition Expenditures Capital Expenditures Net Change in Purchased Stumpage Inventory Earnings per Common Share Shipping and Handling Costs Off-Balance Sheet Arrangements Effect of Recently Issued Authoritative Accounting Guidance In April 2015, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2015-03, “Interest: Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs,” which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying value of the associated debt liability, consistent with the presentation of a debt discount. In August 2015, FASB issued ASU No. 2015-15, “Interest: Imputation of Interest Presentation and Subsequent Measurement of Debt Insurance Costs Associated with Line-of-Credit Arrangements.” which amended ASU 2015-03 and provided guidance that debt issuance costs associated with line-of-credit In July 2015, FASB issued ASU 2015-11, “Inventory (Topic 330): Simplifying the Measurement of Inventory,” which changes the measurement principle for inventory from the lower of cost or market to lower of cost and net realizable value for entities that do not measure inventory using either the last-in, In November 2015, FASB issued ASU 2015-17, “Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes,” which requires entities with a classified balance sheet to present all deferred tax assets and liabilities as non-current. The ASU is effective for the Company on January 1, 2017.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventories	Note 2 – Inventories Inventories at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Raw materials - Logs $ 1,975 772 - Del-Tin – wood fiber 615 384 Finished goods - Lumber 4,142 4,168 - Medium density fiberboard (“MDF”) 2,516 3,889 - MDF consigned to others 1,031 926 Supplies 1,638 1,355 $ 11,917 11,494 The Company utilizes the lower of cost or market basis for determining inventory-carrying values. Lumber and MDF inventory amounts at December 31, 2015 and 2014 are stated at the lower of cost or net realizable value.

Prepaid Expenses and Other Curr

Prepaid Expenses and Other Current Assets	12 Months Ended
	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid Expenses and Other Current Assets	Note 3 – Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Short-term deferred tax assets $ 2,131 2,087 Refundable income taxes 3,062 2,537 Prepaid expenses 687 654 Other current assets 512 619 $ 6,392 5,897

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Business Combinations	Note 4 – Business Combinations On April 1, 2013, the Company acquired the remaining 50 percent membership interest of Del-Tin Fiber L.L.C. (“Del-Tin Fiber”) for an agreed-upon amount of approximately $20,000,000, which was considered to be comprised of a cash payment of $5,170,000 and the value of 50 percent of the long-term debt. Del-Tin Fiber operates an MDF manufacturing facility in El Dorado, Arkansas with a rated annual production capacity of 150,000,000 square feet, on a 3 / 4 -inch basis. The acquisition resulted in Deltic obtaining a controlling financial interest in Del-Tin Fiber due to the Company’s 100 percent ownership of the membership interest of Del-Tin Fiber. As a result, Deltic began treating Del-Tin Fiber as a consolidated subsidiary of the Company as of the acquisition date. With this consolidation, on April 1, 2013, Deltic’s Consolidated Balance Sheets included the $29,000,000 of long-term debt of Del-Tin Fiber, which represents the L.L.C.’s recorded liability for the outstanding industrial bonds due 2027. This acquisition was consistent with Deltic’s strategy of growth through acquisitions and vertical integration, since Del-Tin Fiber uses residual by-products generated by Deltic’s sawmill operations as the raw material in its manufacturing process. Prior to this acquisition the Company owned 50 percent of the membership interest of Del-Tin Fiber and reported it as an equity method investment. In accordance with ASC 805, Deltic accounted for the acquisition as a business combination achieved in stages. Thus, the Company remeasured the carrying amount of its previously held investment in the joint venture to current fair value and recorded a $3,165,000 pretax remeasurement gain, determined by the amount by which the acquisition-date fair value of this investment, of $10,786,000, exceeded its previous carrying amount of $7,621,000. This gain was included in other income in the Company’s Consolidated Statements of Income for the year ended December 31, 2013. The acquisition date fair value of the Company’s existing 50 percent equity interest in Del-Tin Fiber was derived by applying the ownership percentage to the fair value of the net assets of Del-Tin Fiber. It was determined that no discounting was required, since prior to the acquisition, there was equally shared control of the joint venture by the owning members without specific benefit identified that related to the existence of control. In addition, Deltic continues to operate the existing facility to produce MDF. The fair value of assets acquired and liabilities assumed was determined using a combination of various methodologies, as appropriate, depending on the asset type and classification. Current assets and liabilities were valued at book value, since carrying value approximated fair value. Property, plant, and equipment assets were valued under various methodologies, including the market approach using comparable sales for real estate and the cost approach discounted for obsolescence for plant and equipment. Intangible assets were valued using the discounted income approach and using a discount rate of 15 percent. Long-term debt was valued at book value, since it approximated fair value. There was no tax-deductible goodwill as a result of the Del-Tin Fiber acquisition. The total cost of the acquisition has been allocated to the assets acquired and the liabilities assumed based upon their estimated fair values at the date of the acquisition and is presented in the next table. The purchase price allocated to the net tangible and intangible assets acquired and liabilities assumed based on their fair values as of the acquisition date and the calculation of the gain on bargain purchase were as follows: (Thousands of dollars) Accounts receivable $ 4,229 Inventories 4,805 Other current assets 360 Property, plant, and equipment 40,960 Intangible assets 1 1,700 Other assets 171 Current liabilities (1,653 ) Deferred tax liabilities (2,203 ) Long-term liabilities (29,000 ) Net assets acquired 19,369 Cash paid (5,170 ) Fair value of previously held investment in Del-Tin Fiber (10,786 ) Gain on bargain purchase $ 3,413 1 The acquired intangible assets consist of internally developed software which is being amortized over three years. The purchase price allocation resulted in the recognition of a gain on bargain purchase of approximately $3,413,000, which was included in the Consolidated Statements of Income for the year ended December 31, 2013. The gain on bargain purchase was the result of the fair value of the identifiable net assets acquired exceeding the purchase price paid for the acquisition. The seller, Deltic’s former joint venture partner, was motivated to sell its half of Del-Tin Fiber in order to facilitate the sale of its remaining building products business to a major building products company that had no interest in owning a membership interest in a joint venture. This sale was part of the former joint venture partner’s stated plan to divest itself of its building product assets by the end of the year 2013. Transaction costs related to the acquisition of Del-Tin Fiber were insignificant and were expensed as incurred. The cash paid to the seller at the closing of the acquisition was funded by cash on hand. The results of Del-Tin Fiber’s operations have been included in the consolidated financial statements subsequent to the acquisition date and were included in the Company’s Manufacturing segment. Subsequent to the acquisition date, for the year ended December 31, 2013, the Company included net sales of approximately $47,812,000, from Del-Tin Fiber in its Consolidated Statements of Income. Deltic’s operating income for the year ended December 31, 2013, included $3,068,000 from Del-Tin Fiber operations. The following unaudited supplemental pro forma financial information for the years ended December 31, 2013 represents the results of operations of Deltic Timber Corporation as if the Del-Tin Fiber acquisition had occurred on January 1, 2012. This information is based on historical results of operations, adjusted for certain acquisition accounting adjustments, and does not purport to represent Deltic’s actual results of operations as if the acquisition transaction described above would have occurred as of January 1, 2012, nor is it necessarily indicative of future results. Twelve Months Ended December 31, (Thousands of dollars, except per share amounts) 2013 Net sales $ 217,268 Net income 21,193 Basic earnings per common share 1.69 Diluted earnings per common share 1.68

Timber and Timberlands

Timber and Timberlands	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Timber and Timberlands	Note 5 – Timber and Timberlands Timber and timberlands at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Purchased stumpage inventory $ 2,437 1,620 Timberlands 155,997 155,704 Fee timber 326,327 322,714 Logging facilities 1,221 2,720 485,982 482,758 Less accumulated cost of fee timber harvested and facilities depreciation (124,292 ) (118,670 ) Strategic timber and timberlands 361,690 364,088 Non-strategic timber and timberlands 166 322 $ 361,856 364,410 DELTIC TIMBER CORPORATION AND SUBSIDIARIES Notes to Consolidated Financial Statements December 31, 2015 Note 5 – Timber and Timberlands (cont.) Deltic acquired 514 acres of timberlands located in its current operating area in 2015 when cash payments of $824,000 were paid for 474 acres and 40 acres were acquired in a non-monetary exchange transaction. The Company paid cash of $118,203,000 to acquire 72,170 acres of timberland in 2014 and paid cash of $8,919,000 in 2013 for 7,004 acres. Deltic invests in and holds strategic fee timber as a productive asset, and any expenditure to acquire such timber and timberlands is an investing activity on the Company’s Consolidated Statements of Cash Flows. In 1999, the Company initiated a program to identify and sell non-strategic timberlands and to use the sales proceeds to purchase pine timberlands that are strategic to its operations. As the Company identifies these acres and determines that they are either smaller tracts of pine timberland that cannot be strategically managed or are tracts of hardwood bottomland that cannot be converted into pine-growing acreage, they will be sold. As of December 31, 2015 and 2014, approximately 250 acres and 655 acres, respectively, were available for sale. Included in the Woodlands operating income are gains from sales of timberland of $656,000, $857,000, and $1,715,000 in 2015, 2014, and 2013, respectively. Occasionally Deltic engages in land-for-land exchanges that are recorded as sales due to the nature of the land involved. In 2015, there were $25,000 of gains from non-monetary exchanges included in operating income, while there were no such exchange gains in 2014 or 2013. Cost of fee timber harvested amounted to $7,110,000, $5,544,000, and $4,494,000 in 2015, 2014, and 2013, respectively. Depreciation of logging facilities was $98,000, $91,000, and $92,000 for the years 2015, 2014, and 2013, respectively.

Property, Plant, and Equipment

Property, Plant, and Equipment	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	Note 6 – Property, Plant, and Equipment Property, plant, and equipment at December 31 consisted of the following: (Thousands of dollars) Range of Useful Lives 2015 2014 Land N/A $ 947 947 Land improvements 10-20 years 10,409 8,163 Buildings and structures 10-20 years 23,900 22,680 Machinery and equipment 3-15 years 158,385 152,641 193,641 184,431 Less accumulated depreciation (108,146 ) (110,267 ) $ 85,495 74,164 Depreciation of property, plant, and equipment charged to operations was $13,888,000, $12,707,000, and $10,544,000 in 2015, 2014, and 2013, respectively. Gains or (losses) on disposals or retirements of assets included in operating income were $308,000, ($1,071,000), and $362,000 in 2015, 2014, and 2013, respectively. The 2015 gains are inclusive of the involuntary gain on conversion of assets at the Company’s MDF plant. (For additional information see Note 22 – Business Interruption Claim and Gain on Involuntary Conversion of Assets.) During 2015, the Company acquired the office building used as the corporate headquarters from a related party for $1,547,000. The final price for this purchase was the result of an arms-length negotiation based on appraisals prepared by separate independent appraisers hired by the Company and the owner of the building. The purchase is included in the capital expenditures reported in the Consolidated Statement of Cash Flows.

Deferred Revenues and Other Acc

Deferred Revenues and Other Accrued Liabilities	12 Months Ended
	Dec. 31, 2015
Payables and Accruals [Abstract]
Deferred Revenues and Other Accrued Liabilities	Note 7 – Deferred Revenues and Other Accrued Liabilities Deferred revenues and other accrued liabilities at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Deferred revenues – current $ 2,877 3,310 Vacation accrual 1,360 1,312 Deferred compensation 619 1,166 All other current liabilities 2,751 1,435 $ 7,607 7,223

Other Noncurrent Liabilities

Other Noncurrent Liabilities	12 Months Ended
	Dec. 31, 2015
Payables and Accruals [Abstract]
Other Noncurrent Liabilities	Note 8 – Other Noncurrent Liabilities Other noncurrent liabilities at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Accumulated postretirement benefit obligation $ 12,295 12,343 Excess retirement plan 12,764 9,372 Accrued pension liability 15,698 14,955 Deferred revenue – long-term portion 115 383 All other noncurrent payables 1,487 2,287 $ 42,359 39,340

Change in Accounting Principle

Change in Accounting Principle	12 Months Ended
	Dec. 31, 2015
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
Change in Accounting Principle	Note 9 – Change in Accounting Principle During the fourth quarter of 2015, the Company elected to early adopt the provisions of ASU 2015-03 “Simplifying the Presentation of Debt Issuance Costs.” In accordance with provisions of the FASB topic on Accounting Changes and Error Corrections, all prior periods presented have been retrospectively adjusted to apply the change in accounting principle. A summary of the adjustments is presented below: (Thousands of dollars) Previous Accounting Method 2015 Effect of Change in Accounting Principle As Reported 2015 Prepaid expenses and other current assets $ 6,475 (83 ) 6,392 Deferred charges and other assets $ 2,829 (164 ) 2,665 Current maturities, debt $ 40,000 (83 ) 39,917 Long-term debt $ 184,000 (164 ) 183,836 Note 9 – Change in Accounting Principle (cont.) (Thousands of dollars) As Previously Reported 2014 Effect of Change in Accounting Principle As Currently Reported 2014 Prepaid expenses and other current assets $ 5,964 (67 ) 5,897 Deferred charges and other assets $ 3,250 (70 ) 3,180 Long-term debt $ 203,000 (137 ) 202,863

Credit Facilities

Credit Facilities	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Credit Facilities	Note 10 – Credit Facilities The Company has an agreement with SunTrust Bank together with other banks, which provides an unsecured and committed revolving credit facility totaling $430,000,000 and includes an option to request an increase in the amount of aggregate revolving commitments by $50,000,000, and includes options to request two twelve-month extensions of the facility maturity date. The credit facility was amended on August 25, 2015 to permit Deltic to expand its credit facilities so that the Company could enter into a new $100,000,000 Term Loan Credit Agreement with American AgCredit, PCA as described in Note 11 to the consolidated financial statements. The credit facility had $55,000,000 and $134,000,000, respectively, outstanding and included in long-term debt at December 31, 2015 and 2014. As of December 31, 2015 and 2014, $375,000,000 and $296,000,000, respectively, were available in excess of all borrowings outstanding under or supported by the respective facilities. Borrowings under the current agreement bear interest at a base rate or an adjusted Eurodollar rate plus an applicable margin, depending upon the type of loan the Company executes. The applicable margin component of the interest rate varies with the type of loan and the Company’s total debt to capital ratio. The agreement contains certain restrictive financial covenants, including a leverage ratio of no greater than .65 to 1, minimum timber market value greater than 175 percent of outstanding total senior indebtedness, and limitations on the incurrence of debt. Fees associated with the current revolving credit facility include a commitment fee of .20 to .35 percent per annum on the unused portion of the committed amount. (For additional information, see Note 23 – Subsequent Events.) The Company may also borrow up to $1,000,000 under a short-term credit facility with BancorpSouth. The agreement expires December 31, 2016, with annual renewal. The amount available to the Company under this facility is reduced by any borrowings by the Company. As of December 31, 2015 and 2014, Deltic had no borrowings outstanding under this line of credit, resulting in $1,000,000 available to the Company. Borrowings bear interest based upon the New York Prime rate. Deltic also has an agreement with BancorpSouth to provide letters of credit. New letters of credit are requested by the Company and are approved and issued by BancorpSouth on a case-by-case basis. Outstanding letters of credit as of December 31, 2015 and 2014 were $491,000 and $620,000, respectively.

Indebtedness

Indebtedness	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Indebtedness	Note 11 – Indebtedness The Company’s indebtedness at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Notes payable, 2.01%¹, due 2019 (See Note 10 – Credit Facilities) $ 55,000 134,000 Senior notes payable, 6.10%, due 2016 40,000 40,000 Term loan credit agreement, 4.05%, due 2025 100,000 — Union County, Arkansas Taxable Industrial Revenue Bonds, .23%², due 2027 29,000 29,000 224,000 203,000 Less unamortized debt issuance costs (247 ) (137 ) Total debt, net 223,753 202,863 Less current maturities (39,917 ) — Long term debt $ 183,836 202,863 ¹ Weighted average interest rate for Notes payable at December 31, 2015 and 2014 was 2.01% and 1.67%, respectively. ² Weighted average interest rate for Bonds at December 31, 2015 and 2014 was .23% and .29%, respectively. The Company has private placement debt outstanding of $40,000,000 of Series A Senior Notes (“Notes”) with Pacific Coast Farm Credit, a division of American AgCredit, due and payable December 18, 2016. The interest rate for the Notes has been 6.10 percent since December 18, 2008, and will remain at that rate for the remainder of the term of the Notes. No installment payments are required, but the terms allow for prepayments at the option of the Company. The agreement contains certain restrictive financial covenants, including a maximum funded debt to capitalization (“leverage”) ratio of .65 to 1, and a requirement to maintain a timber market value greater than 175 percent of outstanding total senior indebtedness. An amended agreement for the Notes was made effective December 1, 2014. The amended agreement made changes to certain financial covenants by changing the leverage ratio to be .65 to 1, and the fixed charge coverage ratio and consolidated net worth covenants were eliminated. All covenant requirements of the Notes are now the same as for the revolving credit facility. Deltic entered into a new $100,000,000 ten-year term loan credit agreement (the “Credit Agreement”) with American AgCredit, PCA, effective August 27, 2015. The Credit Agreement has a 4.05 percent fixed rate of interest and a maturity date of August 27, 2025. The Credit Agreement has the same financial covenants as those found in the Company’s Second Amended and Restated Revolving Credit Agreement as amended on August 25, 2015. With consolidation of Del-Tin Fiber into the Company’s financial statements on April 1, 2013, Deltic’s long-term debt includes $29,000,000 in Union County, Arkansas Taxable Industrial Revenue Bonds (Del-Tin Fiber project) 1998 Series due October 1, 2027 (the “Bonds”). The Bonds were issued by Union County, Arkansas in the amount of $60,000,000 in December 1998 to finance completion of the construction of the MDF plant, as well as the acquisition, construction, and improvement of certain sewage and solid waste disposal facilities related to the MDF plant. On September 1, 2004, $31,000,000 of the Bonds were retired. Neither the State of Arkansas, nor Union County, Arkansas has any liability under the Bonds. Del-Tin Fiber and Union County contemporaneously entered into a lease agreement (the “Lease Agreement”) that obligated Del-Tin Fiber to make lease payments in an amount necessary to fund the debt service on the Bonds. A letter of credit was issued to support the respective Bonds under the Loan Agreement and the Lease Agreement with Union County, Arkansas. Fees associated with the letter of credit included $488,000 in 2015 and $475,000 in 2014 and are included in interest expense in the Consolidated Statements of Income. The Company has unconditionally guaranteed the payment of all amounts owing under the Bonds to the bondholders. The Company’s indebtedness has been presented in these financial statements as though the Company was directly liable for the Bonds. If the Bonds are not remarketed as allowed under the agreement, the letter of credit and the commitment of the lenders are available to support repayment. Prior to the April 1, 2013 acquisition of Del-Tin Fiber, Deltic was a guarantor of one-half of the letter of credit supporting the Bonds. These Bonds bear interest at a variable rate determined weekly by the remarketing agent of the Bonds. Interest is due on the first business day of the month, and all unpaid interest and all principal is due on October 1, 2027. The average interest rate on the Bonds was .28 percent in 2015, .29 percent in 2014, and .38 percent in 2013. As of December 31, 2015, the scheduled maturities of long-term debt for the next five years are $40,000,000 in 2016, none in 2017 or 2018, $55,000,000 in 2019 and none in 2020. (For additional information regarding financial instruments, see Note 10 – Credit Facilities and Note 14 – Fair Value of Financial Instruments.) The table below sets forth the ratio requirements of the covenants in the revolving credit facility, Senior Notes Payable, and the Term Loan Credit Agreement and the status with respect to these covenants as of December 31, 2015 and 2014. Covenants Actual Ratios at Actual Ratios at Leverage ratio should be less than: 1 .65 to 1 .469 to 1 .432 to 1 Total outstanding debt as a percentage of total debt allowed based on the minimum timber market value covenant: 2 — 2 74.01 % 74.94 % 1 The leverage ratio is calculated as total debt divided by total capital employed. Total debt includes indebtedness for borrowed money, secured liabilities, obligations in respect of letters of credit, and guarantees. Total capital employed is the sum of total debt and net worth. Net worth is calculated as total assets minus total liabilities, as reflected on the balance sheet. This covenant is applied at the end of each quarter. 2 Timber market value must be greater than 175 percent of total debt (as defined in (1) above). The timber market value is calculated by multiplying the average price received for sales of timber for the preceding four quarters by the current quarter’s ending inventory of timber. This covenant is applied at the end of the quarter on a rolling four-quarter basis. Based on management’s current operating projections, the Company believes it will remain in compliance with the debt covenants and have sufficient liquidity to finance operations and pay all obligations. However, depending on market conditions and should there be a return of economic uncertainties, the Company could request amendments, or waivers for covenants, or obtain refinancing in future periods. There can be no assurance that the Company will be able to obtain amendments or waivers or negotiate agreeable refinancing terms should it become necessary.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Note 12 – Income Taxes The components of income tax expense/(benefit) related to pre-tax income for the years ended December 31, 2015, 2014, and 2013 are as follows: (Thousands of dollars) 2015 2014 2013 Federal Current $ 1,508 9,959 10,237 Deferred (590 ) (961 ) 138 918 8,998 10,375 State Current 510 887 2,154 Deferred (328 ) (292 ) 103 182 595 2,257 Total income tax expense $ 1,100 9,593 12,632 The following table provides a reconciliation of the Company’s income tax expense at the statutory U.S. federal rate of 35 percent to the actual income tax expense for the years ended December 31, 2015, 2014, and 2013. (Thousands of dollars) 2015 2014 2013 U.S. federal income tax using statutory tax rate $ 1,260 10,239 13,588 State tax, net of federal tax benefit 121 1,130 1,458 Permanent differences (89 ) (1,000 ) (1,219 ) Tax effects resulting from: Rate difference on timber gains (192 ) — — Gain on bargain purchase — — (1,195 ) Reversal of uncertain state income tax position — (776 ) — Income tax provision as reported $ 1,100 9,593 12,632 The effective income tax rate in 2015 benefitted from the passage in December 2015 of federal legislation which reduced the maximum income tax rate to 23.8 percent for the tax year 2016 on timber gains for trees held by the Company for longer than 15 years. Income tax benefits of $192,000 were recognized in 2015 due to the change in income tax rate applied to the amount of temporary differences expected to be realized in timber gains in 2016. The Company’s deferred tax assets and deferred tax liabilities at December 31, 2015 and 2014 consisted of the following: (Thousands of dollars) 2015 2014 Deferred tax assets Investment in real estate held for development and sale $ 17,564 17,286 Postretirement and other employee benefits 21,725 20,086 Other deferred tax assets 1,861 2,093 Total deferred tax assets 41,150 39,465 Deferred tax liabilities Timber and timberlands (27,950 ) (27,191 ) Property, plant, and equipment (11,370 ) (11,021 ) Other deferred tax liabilities (224 ) (268 ) Total deferred tax liabilities (39,544 ) (38,480 ) Net deferred tax assets/(liabilities) $ 1,606 985 The deferred tax assets and liabilities are classified in the accompanying consolidated balance sheets as follows: (Thousands of dollars) 2015 2014 Current tax assets $ 2,131 2,087 Long-term tax liabilities (525 ) (1,102 ) Net deferred tax assets/(liabilities) $ 1,606 985 In assessing the realizability of deferred tax assets, Deltic’s management considers whether it is more-likely-than-not that some portion or all of the Company’s total deferred tax assets will not be realized. The ultimate realization of these deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. Based on the level of historical taxable income and projections for future taxable income over the periods in which the temporary differences are anticipated to reverse, management believes it is more-likely-than-not that the Company will realize the benefits of its deferred tax assets at December 31, 2015, as reductions of future taxable income or by utilizing available tax planning strategies. However, the amount of the net deferred tax assets considered realizable could be adjusted in the future if estimates of taxable income are revised. Any liabilities established for unrecognized tax benefits may not be combined with deferred tax assets or liabilities, except when offset by net operating losses. There were no unrecognized tax benefits at December 31, 2015 or 2014 and a reconciliation of the beginning and ending amount of unrecognized tax benefits for the period ending December 31, 2014 (excluding both interest and any related federal benefits) is as follows: (Thousands of dollars) 2014 Balance at January 1 $ 1,185 Lapse of statute (1,185 ) Balance at December 31 $ — The Company’s policy is to recognize interest expense related to unrecognized tax benefits in interest expense and penalties in other expenses. During the third quarter of 2014, the accrued liability balances for interest expense and the penalties related to the uncertain tax liabilities, mentioned above, were reversed and recognized as reductions to interest expense and an increase in other income, respectively. The Company is no longer subject to federal and state income tax examination by tax authorities for years before 2012.

Stockholders Rights Plan

Stockholders Rights Plan	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Stockholders Rights Plan	Note 13 – Stockholders Rights Plan The Company has a Stockholders Rights Plan (“Rights Plan”), which provides for each eligible common shareholder to receive a dividend of one preferred stock purchase right (a “Right”) for each outstanding share of the Company’s common stock held. On October 19, 2006, the Company’s Board of Directors amended the Rights Plan to, among other items, extend its term to December 31, 2016, and to increase the exercise price of the rights to $200 per share. The Rights will detach from the common stock and become exercisable: (1) following a specified period of time after the date of the first public announcement that a person or group of affiliated or associated persons (“Acquiring Person”) has become the beneficial owner of 15 percent or more of the Company’s common stock or (2) following a specified amount of time of the commencement of a tender or exchange offer by any Acquiring Person, which would, if consummated, result in such persons becoming the beneficial owner of 15 percent or more of the Company’s common stock. In either case, the detachment of the Rights from the common stock is subject to extension by a majority of the directors of the Company. The Rights have certain anti-takeover effects and will cause substantial dilution to any Acquiring Person that attempts to acquire the Company without conditioning the offer on a substantial number of Rights being acquired. Other terms of the Rights are set forth in, and the foregoing description is qualified in its entirety by, the Rights Agreement between the Company and Harris N.A. (formerly known as Harris Trust and Savings Bank), as Rights Agent.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 14 – Fair Value of Financial Instruments Fair value measurement accounting establishes a fair value hierarchy based on the quality of inputs used to measure fair value, with Level 1 being the highest quality and Level 3 being the lowest quality. Level 1 inputs are quoted prices in active markets on identical assets or liabilities. Level 2 inputs are observable inputs other than quoted prices included in Level 1. Level 3 inputs are unobservable inputs which reflect assumptions about pricing by market participants. Information pertaining to the fair value of the pension plan assets is found in Note 17 – Employee and Retiree Benefit Plans. The following is a description of the valuation methodologies used for liabilities measured at fair value. Nonqualified Employee Savings Plan The fair value measurements for the Company’s financial liabilities accounted for at fair value on a recurring basis at December 31, 2015 are presented in the following table: Fair Value Measurements at Reporting Date Using December 31, Quoted Prices in Significant Significant (Thousands of dollars) 2015 Level 1 Level 2 Level 3 Liabilities Nonqualified employee savings plan $ 1,488 1,488 — — Long-term Debt, Including Current Maturities The following table presents the carrying amounts and estimated fair values of financial instruments held by the Company at December 31, 2015 and 2014. The fair value of a financial instrument is the amount at which the instrument could be exchanged in a current transaction between willing parties. The table excludes financial instruments included in current assets and liabilities, except current maturities of long-term debt, all of which have fair values approximating carrying values. 2015 2014 (Thousands of dollars) Carrying Estimated Carrying Estimated Financial liabilities Long-term debt, including current maturities $ 223,753 225,123 202,863 207,077

Concentration of Credit Risks

Concentration of Credit Risks	12 Months Ended
	Dec. 31, 2015
Risks and Uncertainties [Abstract]
Concentration of Credit Risks	Note 15 – Concentration of Credit Risks Financial instruments, which potentially subject the Company to credit risk, are trade accounts receivable. These receivables normally arise from the sale of wood products, MDF, and real estate. Concentration of credit with respect to these trade accounts receivable is limited due to the large number of customers comprising the Company’s customer base. No single recurring customer accounted for a significant amount of the Company’s sales of wood products, MDF, or real estate in 2015, 2014, or 2013. At December 31, 2015, there was one significant accounts receivable of $844,000 from a single customer and at December 31, 2014 there were none. The Company performs ongoing credit evaluations of its customers and generally does not require collateral to support accounts receivable.

Other Comprehensive Income Disc

Other Comprehensive Income Disclosures	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Other Comprehensive Income Disclosures	Note 16 – Other Comprehensive Income Disclosures The following tables detail the changes in accumulated other comprehensive loss (“AOCL”) by component for the twelve months ended December 31, 2015, 2014, and 2013: Changes in Accumulated Other Comprehensive Loss by Component (Net of Tax) (Thousands of dollars) Defined Benefit Funded Retirement Plan Defined Benefit Unfunded Retirement Plan Post- Benefit Plan Total AOCL at January 1, 2015 $ (7,615 ) (3,064 ) (732 ) (11,411 ) Amounts reclassified from AOCL 512 369 20 901 Net gain/(loss) arising during period 32 (1,614 ) 498 (1,084 ) Net current period other comprehensive income/(loss) 544 (1,245 ) 518 (183 ) AOCL at December 31, 2015 $ (7,071 ) (4,309 ) (214 ) (11,594 ) (Thousands of dollars) Defined Benefit Funded Retirement Plan Defined Benefit Unfunded Retirement Plan Post- Benefit Plan Total AOCL at January 1, 2014 $ (2,410 ) (482 ) 213 (2,679 ) Amounts reclassified from AOCL 111 173 (121 ) 163 Net loss arising during period (5,316 ) (2,755 ) (824 ) (8,895 ) Net current period other comprehensive loss (5,205 ) (2,582 ) (945 ) (8,732 ) AOCL at December 31, 2014 $ (7,615 ) (3,064 ) (732 ) (11,411 ) (Thousands of dollars) Defined Benefit Funded Retirement Plan Defined Benefit Unfunded Retirement Plan Post- Benefit Plan Total AOCL at January 1, 2013 $ (9,553 ) (3,380 ) (1,170 ) (14,103 ) Amounts reclassified from AOCL 529 38 (116 ) 451 Net gain arising during period 6,614 2,860 1,499 10,973 Net current period other comprehensive income 7,143 2,898 1,383 11,424 AOCL at December 31, 2013 $ (2,410 ) (482 ) 213 (2,679 ) Reclassification Out of Accumulated Other Comprehensive Loss Details about AOCL Components For the Year Ended December 31, 2015 (Thousands of dollars) Defined Defined Post- Total Amortization of prior service costs $ 4 — — 4 Amortization of actuarial losses 839 607 79 1,525 Amortization of plan amendment — — (46 ) (46 ) Total before tax 843 607 33 1,483 Income tax benefit/(expense) (331 ) (238 ) (13 ) (582 ) Total reclassifications – net of tax $ 512 369 20 901 For the Year Ended December 31, 2014 (Thousands of dollars) Defined Defined Post- Total Amortization of prior service costs $ 17 (7 ) — 10 Amortization of actuarial losses 165 292 — 457 Amortization of plan amendment — — (199 ) (199 ) Total before tax 182 285 (199 ) 268 Income tax benefit/(expense) (71 ) (112 ) 78 (105 ) Total reclassifications – net of tax $ 111 173 (121 ) 163 Amounts in parentheses indicate expenses. These items are included in the computation of net periodic retirement and postretirement costs. See Note 17 – Employee and Retiree Benefit Plans. For the Year Ended December 31, 2013 (Thousands of dollars) Defined Defined Benefit Post- Total Amortization of prior service costs $ 18 (11 ) — 7 Amortization of actuarial losses 852 74 8 934 Amortization of plan amendment — — (199 ) (199 ) Total before tax 870 63 (191 ) 742 Income tax benefit/(expense) (341 ) (25 ) 75 (291 ) Total reclassifications – net of tax $ 529 38 (116 ) 451 Amounts in parentheses indicate expenses. These items are included in the computation of net periodic retirement and postretirement costs. See Note 17 – Employee and Retiree Benefit Plans. Tax Effects by Component For the Year Ended December 31, 2015 (Thousands of dollars) Before Tax Net of Gains/(losses) arising during the period $ (1,784 ) 700 (1,084 ) Amortization of prior service costs 4 (2 ) 2 Amortization of actuarial losses/(gains) 1,525 (598 ) 927 Amortization of plan amendment (46 ) 18 (28 ) $ (301 ) 118 (183 ) For the Year Ended December 31, 2014 (Thousands of dollars) Before Tax Net of Gains/(losses) arising during the period $ (14,636 ) 5,741 (8,895 ) Amortization of prior service costs 10 (4 ) 6 Amortization of actuarial losses/(gains) 457 (179 ) 278 Amortization of plan amendment (199 ) 78 (121 ) $ (14,368 ) 5,636 (8,732 ) For the Year Ended December 31, 2013 (Thousands of dollars) Before Tax Net of Gains/(losses) arising during the period $ 18,054 (7,081 ) 10,973 Amortization of prior service costs 7 (3 ) 4 Amortization of actuarial losses/(gains) 934 (366 ) 568 Amortization of plan amendment (199 ) 78 (121 ) $ 18,796 (7,372 ) 11,424

Employee and Retiree Benefit Pl

Employee and Retiree Benefit Plans	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Employee and Retiree Benefit Plans	Note 17 – Employee and Retiree Benefit Plans The Company has a funded, qualified defined benefit retirement plan (“Retirement Plan”) that covers each employee of Deltic Timber Corporation, excluding employees of the subsidiaries, who were employed on December 31, 2014 and had completed 1,000 hours of service for a twelve-month period, once employment has commenced, and continues to meet both the 1,000 hours requirement and the employment requirement for each twelve-month period. Effective December 31, 2014, the Retirement Plan was closed to new participants. An unfunded, nonqualified supplemental executive retirement plan is maintained for certain current and former employees. All contributions to both plans are made by the Company. The plans provide defined benefits based on years of benefit service and average monthly compensation as defined by the Company’s Retirement Plan. The Company determines the vested benefit obligation on the actuarial present value based on the employee’s expected date of retirement. For the December 31, 2015 measurement of Deltic’s defined benefit obligations, the Company selected the RP-2014 Mortality Tables using Projection Scale MP-2015 as issued by the Society of Actuaries, since it was determined that those rates represented the best estimate of mortality for the participants in the Company’s plans. The Company also sponsors a plan for retired employees, excluding employees of the subsidiaries, that provides comprehensive healthcare benefits (supplementing Medicare benefits, for those eligible) and life insurance benefits. Costs are accrued for this plan during the service lives of covered employees. Retirees contribute a portion of the self-funded cost of healthcare benefits and the Company contributes the remainder. The Company pays premiums for life insurance coverage arranged through an insurance company. The health care plan is funded on a pay-as-you-go basis. The Company retains the right to modify or terminate the benefits and/or cost-sharing provisions. The following table sets forth the plans’ benefit obligations, fair value of plan assets, and funded status at December 31, 2015 and 2014. Defined Benefit Funded Retirement Plan Defined Benefit Plan Other Postretirement Plan (Thousands of dollars) 2015 2014 2015 2014 2015 2014 Change in benefit obligation Benefit obligation at beginning of period $ 47,750 37,010 9,644 4,690 12,698 10,756 Service cost 1,959 1,476 518 302 527 418 Interest cost 2,021 1,839 494 373 559 497 Participant contributions — — — — 92 88 Actuarial (gain)/loss (2,406 ) 8,626 2,655 4,534 (819 ) 1,355 Benefits paid (1,266 ) (1,201 ) (275 ) (255 ) (382 ) (416 ) Benefit obligation at end of period $ 48,058 47,750 13,036 9,644 12,675 12,698 Change in plan assets Fair value of plan assets at beginning of period $ 32,795 30,627 — — — — Actual return on plan assets 240 2,327 — — — — Employer contributions 775 1,200 275 255 290 328 Participant contributions — — — — 92 88 Benefits paid (1,266 ) (1,201 ) (275 ) (255 ) (382 ) (416 ) Expenses (184 ) (158 ) — — — — Fair value of plan assets at end of period $ 32,360 32,795 — — — — Funded status of plans $ (15,698 ) (14,955 ) (13,036 ) (9,644 ) (12,675 ) (12,698 ) Amounts recognized in the balance sheet Current liability $ — — (272 ) (272 ) (380 ) (355 ) Noncurrent liability $ (15,698 ) (14,955 ) (12,764 ) (9,372 ) (12,295 ) (12,343 ) Deferred income taxes – net $ 6,157 5,866 5,113 3,783 4,647 4,981 Accumulated other comprehensive (income)/loss $ 7,071 7,615 4,308 3,064 215 732 Amounts recognized in accumulated other comprehensive loss Net unrecognized (gain)/loss $ 11,633 12,525 7,088 5,041 334 1,231 Unrecognized prior service cost/(credit) — 4 — — — (46 ) Tax effects (4,562 ) (4,914 ) (2,780 ) (1,977 ) (119 ) (453 ) $ 7,071 7,615 4,308 3,064 215 732 Defined Benefit Retirement Plan Defined Benefit Retirement Plan Other Plan (Thousands of dollars) 2015 2014 2015 2014 2015 2014 Assumptions used in measurement of benefit obligations Weighted average discount rate 4.47 % 4.21 % 4.47 % 4.21 % 4.50 % 4.25 % Rate of compensation increase 4.00 % 4.00 % 5.00 % 4.00 % N/A N/A Accumulated benefit obligations at year end $ 42,829 40,720 8,813 6,792 N/A N/A Components of net periodic retirement expense and other postretirement benefits expense consisted of the following: (Thousands of dollars) 2015 2014 2013 Defined benefit funded retirement plan Service cost $ 1,959 1,476 1,549 Interest cost 2,021 1,839 1,557 Expected return on plan assets (2,410 ) (2,290 ) (1,894 ) Amortization of prior service cost 4 17 18 Amortization of actuarial loss 839 165 852 Net periodic benefit cost $ 2,413 1,207 2,082 Defined benefit unfunded retirement plan Service cost $ 518 302 143 Interest cost 494 373 193 Amortization of prior service credit — (7 ) (11 ) Amortization of actuarial loss 607 292 74 Net periodic benefit cost $ 1,619 960 399 Other postretirement benefit plan Service cost $ 527 418 450 Interest cost 559 497 431 Amortization of prior service credit (46 ) (199 ) (199 ) Amortization of actuarial loss 79 — 8 Net periodic benefit cost $ 1,119 716 690 (Thousands of dollars) 2015 2014 2013 Assumptions used to determine net periodic benefit cost – defined benefit pension plans Weighted average discount rate 4.21 % 4.84 % 3.94 % Expected long-term rate of return on plan assets 7.50 % 7.50 % 7.50 % Rate of compensation increase 4.00 % 4.00 % 4.00 % Assumptions used to determine net periodic benefit cost – other postretirement plan Weighted average discount rate 4.25 % 4.85 % 3.90 % Other changes in plan assets and benefit obligations recognized in other comprehensive (income)/loss Net unrecognized loss/(gain) $ 1,784 14,636 (18,054 ) Amortization of prior service credit (4 ) (10 ) (7 ) Amortization of actuarial losses (1,525 ) (457 ) (934 ) Amortization of plan amendment 46 199 199 Tax effect of changes (118 ) (5,636 ) 7,372 Total recognized in other comprehensive (income)/loss $ 183 8,732 (11,424 ) (Thousands of dollars) Defined Benefit Defined Other Estimated benefit payments by year 2016 $ 1,434 272 380 2017 1,563 269 426 2018 1,722 266 465 2019 1,883 263 516 2020 2,099 259 553 2021 – 2025 13,355 4,655 3,225 The estimated net loss for the defined benefit funded and unfunded retirement pension plans that will be amortized from accumulated other comprehensive income into net periodic benefit cost over the next fiscal year is $1,468,000. The amount of projected expense in 2016 for the defined benefit funded and unfunded retirement plans are expected to be $2,393,000 and $1,730,000, respectively. The Company expects to make contributions during 2016 of approximately $600,000 to the defined benefit funded retirement plan, $272,000 to fund benefits paid from its defined benefit unfunded retirement plan, and approximately $380,000 to fund the other postretirement benefit plan. The discount rate assumption used by the Company to measure benefit obligations and net periodic expenses is based on a spot-rate yield curve using current rates of return on high-quality fixed-income investments at the measurement date, reflect the rates at which the pension benefits can be effectively settled and is used to determine the present value of the expected future cash flows at the measurement date. Additionally, a single rate is determined so that the present value of the benefit obligations using the single rate equals the present value using the spot rate yield curve. The yield curve only includes bonds that meet the following criteria: (1) have maturities between 6 months and 30 years; (2) are noncallable, nonputable, and do not have a sinking fund provision; (3) have fixed coupon payments with a single payment at maturity; (4) have more than $250 million par outstanding; (5) are U.S. dollar-denominated bonds; and (6) have an average rating of AA- (S&P/Fitch) or Aa3 (Moody’s) and higher. Any taxable municipal bond, “Build America” bonds, or bonds that are issued by any U.S. Government entity that fit under the above criteria are excluded. To develop the expected long-term rate of return on asset assumption, the Company considered the rates of return of assets the Company’s pension plan invested in and compared them to the historical rates of return on investments in similar assets. Further, these returns were compared to plans of other companies which had similar investment philosophies. After a review of the rate of inflation and its impact, management made the selection of the 7.50 percent assumption. In determining the benefit obligation for health care at December 31, 2015, health care inflation cost was assumed to increase at an annual rate of five percent in 2015. Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plan. A one percentage-point increase in the assumed health care cost trend rate would increase the aggregate service and interest cost components of periodic benefit cost for 2015 by $222,000 and the benefit obligation by $2,085,000, while a one percentage-point decrease in the assumed rate would decrease the 2015 cost components by $172,000 and the benefit obligation by $1,652,000. Funded Plan The investment policy of the Plan is to achieve growth with the preservation of principal. To achieve the goal of growth of plan assets (excluding contributions and withdrawals) at a rate that exceeds inflation, a balanced portfolio consisting of equities, fixed income, alternative investments, and cash equivalents is maintained. The components of the portfolio should be securities that have readily available prices and can be sold easily without significantly impacting the price of the securities, with an exception for professionally managed hedge funds. The minimum and maximum asset allocation levels in total, are equities, 45 to 70 percent, fixed income, 25 to 55 percent, alternative investments, zero to 15 percent, and up to 5 percent in cash equivalents. Further, the total equity minimum and maximum allocation levels at market, for large cap equity is 40 to 60 percent, mid and small cap equity is 5 to 15 percent, and international equity is zero to 25 percent, with international emerging not to exceed 40 percent of international equities allocation. Not more than 2.5 percent of the market value of Plan assets may be held in the securities of any single issuer with the exception of the U.S. government or its agencies. As of December 31, 2015, less than three percent of the total market value of the Plan assets was invested in collateralized mortgage obligations and asset-backed security issues. The following types of securities are permitted in the Plan: Equities – Common stocks, preferred stocks, convertible preferred stocks, convertible bonds, American depository receipts, proprietary funds, mutual funds, and exchange-traded funds. Fixed income – U.S. government securities, corporate debt obligations, U.S. government agency securities, mortgage-backed security issues, international bonds, and asset-backed securities. Cash equivalents – U.S. government securities. Alternative investments, hedge funds – Qualified fund of funds limited partnership shares or fund of funds in a mutual fund wrapper. Fair Value Measurement Common stock, preferred securities, and exchange-traded funds: Mutual funds: Alternative investment funds: U.S. treasuries and government agency securities: Corporate debt obligations and U.S. government and agency securities: Money market funds: The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the Plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. Fair value measurement accounting establishes a fair value hierarchy based on the quality of inputs used to measure fair value, with Level 1 being the highest quality and Level 3 being the lowest quality. Level 1 inputs are quoted prices in active markets on identical assets or liabilities. Level 2 inputs are observable inputs other than quoted prices included in Level 1. Level 3 inputs are unobservable inputs which reflect assumptions about pricing by market participants. The following table sets forth by level within the fair value hierarchy the Plan’s investments at fair value as of December 31, 2015. Fair Value Measurements at Reporting Date Using (Thousands of dollars) Percent Total Total Carrying Value at Dec. 31, 2015 Level 1 Level 2 Level 3 Plan Investments Cash and cash equivalents 2.3 $ 738 738 — — Other .1 46 46 — — U.S. Govt. and agency securities 15.7 5,093 2,901 2,192 — Corporate debt obligations 9.7 3,144 — 3,144 — Municipal debt obligations .3 95 — 95 — Mutual funds: Dividends and growth 34.2 11,057 11,057 — — International and emerging markets 5.4 1,739 1,739 — — Fixed income 2.3 733 733 — — Exchange-traded funds 22.1 7,148 7,148 — — Alternative investment funds 7.9 2,567 — — 2,567 Total plan investments at fair value 100.0 $ 32,360 24,362 5,431 2,567 Percent of fair value hierarchy 100 75.3 16.8 7.9 The following table sets forth the activity in the Level 3 investments for the year ended December 31, 2015. Fair Value Measurements (Level 3) (Thousands of dollars) Alternative Investment Beginning balance at December 31, 2014 $ 2,189 Actual return on plan assets: Relating to assets still held at the reporting date (122 ) Purchases, sales, and settlements 500 Ending balance at December 31, 2015 $ 2,567 The following table sets forth by level within the fair value hierarchy the Plan’s investments at fair value as of December 31, 2014. Fair Value Measurements at Reporting Date Using (Thousands of dollars) Percent Total Level 1 Level 2 Level 3 Plan Investments Cash and cash equivalents 4.5 $ 1,470 1,470 — — Other .1 40 40 — — Equity securities by sector: Energy .3 105 105 — — Materials and industrials 2.0 652 652 — — Consumer 3.9 1,274 1,274 — — Health care 2.6 854 854 — — Financials .6 201 201 — — Information tech 4.6 1,503 1,503 — — Foreign stocks 1.0 319 319 — — U.S. Govt. and agency securities 15.2 5,001 3,208 1,793 — Corporate debt obligations 7.2 2,370 — 2,370 — Mutual funds: Dividends and growth 28.4 9,327 9,327 — — International and emerging markets 5.6 1,835 1,835 — — Fixed income 2.3 742 742 — — Exchange-traded funds 15.0 4,913 4,913 — — Alternative investment funds 6.7 2,189 — — 2,189 Total plan investments at fair value 100.0 $ 32,795 26,443 4,163 2,189 Percent of fair value hierarchy 100 80.6 12.7 6.7 The following table sets forth the activity in the Level 3 investments for the year ended December 31, 2014. Fair Value Measurements (Thousands of dollars) Alternative Investment Beginning balance at December 31, 2013 $ 2,077 Actual return on plan assets: Relating to assets still held at the reporting date 112 Purchases, sales, and settlements — Ending balance at December 31, 2014 $ 2,189 Thrift Plan

Incentive Plans

Incentive Plans	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Incentive Plans	Note 18 – Incentive Plans Stock Incentive Plan On April 26, 2012, the Company’s shareholders approved an amendment to extend the Deltic Timber Corporation 2002 Stock Incentive Plan (“the 2002 Plan”) for ten years to April 26, 2022 and change the maximum number of shares which may be awarded in any calendar year as restricted stock and restricted stock units or other stock-based awards to 75,000 shares. The 2002 Plan replaced the 1996 Stock Incentive Plan, which was terminated. The 2002 Plan permits annual awards of shares of the Company’s common stock to executives, other key employees, and nonemployee directors. Under the plan, the Executive Compensation Committee (“the Committee”) is authorized to grant: (1) stock options; (2) restricted stock and restricted stock units; (3) performance units; and (4) other stock-based awards, including stock appreciation rights and rights to dividends and dividend equivalents. The number of shares originally registered for issuance under the 2002 Plan was 1,800,000 shares. Additional shares may be issued if an adjustment is determined necessary by the Committee as the result of dividend or other distribution, recapitalization, stock split, reverse stock split, reorganization, merger, consolidation, split-up, spin-off, combination, repurchase or exchange of common stock, or other corporate transaction in order to prevent dilution or enlargement of benefits or potential benefits intended to be made available. At December 31, 2015, 796,413 of these 1,800,000 shares were available for award under the 2002 Plan. No participant in the 2002 Plan may receive options and stock appreciation rights in any calendar year that relates to more than 50,000 shares, and the maximum number of shares, which may be awarded as restricted stock and restricted stock units or other stock-based awards, is 75,000 shares. The Company has a policy of issuing treasury stock to satisfy all share-based incentive plans. Under the fair value recognition provisions for share-based payments, share-based compensation cost is estimated at the grant date based on the fair value of the award and is recognized as expense over the requisite service period of the award. The fair value of stock options granted is determined using a binomial model. The fair value of restricted stock awards is determined by reference to the fair market value of the Company’s common stock on the date of grant. Restricted stock performance units are valued using a Monte Carlo simulation model. Compensation cost is recognized on a straight-line basis over the requisite service period. The benefits of tax deductions in excess of recognized compensation cost is to be reported as a financing cash flow. Deltic issues restricted stock performance units whose vesting is contingent upon meeting certain financial performance goals based upon the Company’s total stockholder return compared to the total return of a Paper and Forest Products Index selected by the Committee and calculated by Standard and Poor’s. Determining the appropriate amount to expense is based on likelihood of achievement of the stated goals and requires judgment, including forecasting future financial results. The expected option term is based on the term of the option and historical exercise and expiration experience. The Company uses historical volatility over a ten-year trading life to determine weighted expected volatility assumptions. The expected dividend yield is based on the Company’s average dividend yield from 2011 to 2014. Risk-free interest rates are based on historical rates and forward-looking factors. The pre-vesting forfeiture rate is based on past forfeiture rates and expected trends. Assumptions for the 2015, 2014, and 2013 valuation of stock options and restricted stock performance units consisted of the following: 2015 2014 2013 Expected term of options (in years) 6.27 6.27 6.27 Weighted expected volatility 38.64 % 37.38 % 37.78 % Dividend yield .56 % .55 % .58 % Risk-free interest rate - performance restricted shares 1.15 % 1.23 % .60 % Risk-free interest rate - stock options 1.92 % 2.99 % 1.98 % Stock price as of valuation date $ 65.89 63.21 71.35 Restricted performance share valuation $ 77.52 80.56 87.74 Grant date fair value - stock options $ 24.40 21.87 26.20 The consolidated statements of income for the years ended December 31, 2015, 2014, and 2013 included $3,324,000, $3,238,000, and $2,797,000, respectively, of stock-based compensation expense reflected in general and administrative expenses. The potential excess income tax benefit derived from all share-based payment arrangements with employees was $36,000, $160,000, and $409,000 for the years ended December 31, 2015, 2014, and 2013, respectively. Stock Options A summary of stock options as of December 31, 2015, and changes during the year ended are presented below: Shares Weighted Weighted Aggregate Outstanding at January 1, 2015 151,753 $ 60.99 Granted 22,494 65.89 Exercised (24,897 ) 48.11 Forfeited/expired (1,480 ) 65.51 Outstanding at December 31, 2015 147,870 $ 63.86 6.2 $ 182 Exercisable at December 31, 2015 87,795 $ 62.17 4.9 $ 182 The intrinsic value of options exercised during the years ended December 31, 2015, 2014, and 2013 was $430,000, $124,000, and $513,000, respectively. At December 31, 2015, there was $909,000 of unrecognized compensation cost related to nonvested stock options. The weighted average period remaining to vest is 1.5 years. Additional information about stock options outstanding at December 31, 2015, consisted of the following: Options Outstanding Options Exercisable Range of Exercise Prices Number Average Average Number Average $31.00—$35.00 658 3.1 $ 34.41 658 $ 34.41 $41.00—$45.00 2,774 4.1 $ 44.84 2,774 $ 44.84 $51.00—$55.00 20,230 1.3 $ 52.59 20,230 $ 52.59 $56.00—$65.00 51,995 6.6 $ 63.38 32,664 $ 63.47 $66.00—$75.00 72,213 7.4 $ 68.36 31,469 $ 69.09 147,870 87,795 Restricted Stock and Restricted Stock Units — A summary of nonvested restricted stock as of December 31, 2015, and changes during the year then-ended are presented below: Shares Weighted Grant-Date Nonvested at January 1, 2015 85,410 $ 66.51 Granted 21,005 66.06 Vested (18,682 ) 63.54 Forfeited (628 ) 67.00 Nonvested at December 31, 2015 87,105 $ 67.04 As of December 31, 2015, there was $2,380,000 of unrecognized compensation cost related to nonvested restricted stock. That cost is expected to be recognized over a weighted-average period of 1.6 years. Performance Units A summary of nonvested restricted stock performance units as of December 31, 2015, and changes during the year then-ended are presented below: Shares Weighted Grant-Date Nonvested at January 1, 2015 56,586 $ 85.78 Granted 20,297 77.52 Units not meeting vesting conditions (12,135 ) 85.56 Forfeited (848 ) 83.06 Nonvested at December 31, 2015 63,900 $ 83.24 As of December 31, 2015, there was $2,316,000 of unrecognized compensation cost related to nonvested restricted stock performance units. That cost is expected to be recognized over a weighted-average period of 1.8 years. Other Stock-Based Awards Cash Incentive Compensation Plan The Company has an incentive compensation plan that provides for annual cash awards to officers and key employees based on actual results for a year compared to objectives established at the beginning of that year by the Executive Compensation Committee, which administers the Plan. The Company recorded expenses for cash incentive awards of $16,000, $586,000, and $2,549,000 in 2015, 2014, and 2013, respectively. The Company had accrued provisions for cash incentive awards totaling $50,000 and $400,000 at December 31, 2015 and 2014, respectively, reflected in the consolidated balance sheets in deferred revenues and other accrued liabilities.

Supplemental Cash Flows Disclos

Supplemental Cash Flows Disclosures	12 Months Ended
	Dec. 31, 2015
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flows Disclosures	Note 19 – Supplemental Cash Flows Disclosures Additional information concerning cash flows at December 31 consisted of the following: (Thousands of dollars) 2015 2014 2013 Income taxes paid in cash $ 2,517 14,976 11,042 Interest paid 5,679 5,420 3,954 Interest capitalized (103 ) (70 ) (53 ) Non-cash investing and financing activities excluded from the Consolidated Statement of Cash Flows include: (Thousands of dollars) 2015 2014 2013 Issuance of restricted stock $ 1,677 1,290 935 Capital expenditures accrued, not paid 1,603 738 1,271 Timberland exchanges 39 — — Fair value of Del-Tin Fiber net assets acquired — — 19,369 (Increases)/decreases in operating working capital, other than cash and cash equivalents, for each of the three years ended December 31 consisted of the following: (Thousands of dollars) 2015 2014 2013 Trade accounts receivable $ 2,091 (1,756 ) 2,178 Other receivables (11 ) 8 (6 ) Inventories (423 ) 945 (2,740 ) Prepaid expenses and other current assets (441 ) (2,543 ) (184 ) Trade accounts payable 420 (2,123 ) 3,701 Accrued taxes other than income taxes (31 ) (61 ) 216 Deferred revenues and other accrued liabilities 1,302 (3,644 ) 2,718 $ 2,907 (9,174 ) 5,883 Cash flows provided by other operating activities included a decrease in deferred long-term mineral lease rental revenue of $267,000 in 2015, $266,000 in 2014, and $1,635,000 in 2013. Total cash payments received were $81,000 in 2015, $711,000 in 2014, and $30,000 in 2013. These payments will be recognized over the term of the lease.

Earnings per Share

Earnings per Share	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Earnings per Share	Note 20 – Earnings per Share The amounts used in computing earnings per share and the effect on income and weighted-average number of shares outstanding of dilutive potential common stock consisted of the following at December 31: (Thousands of dollars, except per share amounts) 2015 2014 2013 Net earnings allocated to common stock $ 2,623 19,445 25,924 Net earnings allocated to participating securities 31 217 268 Net income allocated to common stock and participating securities $ 2,654 19,662 26,192 Weighted average number of common shares used in basic EPS 12,407 12,497 12,566 Effect of dilutive stock awards 60 56 58 Weighted average number of common shares and dilutive potential common stock used in EPS assuming dilution 12,467 12,553 12,624 Earnings per common share Basic $ .21 1.56 2.06 Assuming dilution $ .21 1.55 2.05 Diluted earnings per common share is computed using the weighted-average number of shares determined for the basic earnings per common share computation plus the dilutive effect of common stock equivalents using the treasury stock method. The following table provides information about potentially dilutive securities that were outstanding but were not included in the computation of diluted earnings per share, because they were anti-dilutive or, in the case of the restricted performance shares, did not meet the metrics established for awarding: 2015 2014 2013 Options 72,213 76,968 50,197 Restricted performance shares 63,900 56,586 52,625

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 21 – Commitments and Contingencies Commitments The Company is also involved in litigation incidental to its business from time to time. Currently, there are no material legal proceedings outstanding.

Business Interruption Claim and

Business Interruption Claim and Gain on Involuntary Conversion of Assets	12 Months Ended
	Dec. 31, 2015
Extraordinary and Unusual Items [Abstract]
Business Interruption Claim and Gain on Involuntary Conversion of Assets	Note 22 – Business Interruption Claim and Gain on Involuntary Conversion of Assets On March 10, 2015, the Company experienced a fire at its MDF plant located in El Dorado, Arkansas. Damage was limited to the press portion of the facility and operations at the facility were temporarily suspended while repairs were made to the damaged area. Most of the repairs were completed in April 2015 and the plant became fully operational in that month. The Company maintains insurance coverage for both business interruption and property damage. Deltic settled the insurance claims during the second quarter and recorded the applicable income from the business interruption claim and gains on involuntary conversion of assets in the operating income section of the consolidated income statement. The claim for business interruption insurance was settled for a total of $2,452,000, of which $516,000 was reported in Other Operating Income in the Company’s Consolidated Statements of Income for the quarter ending June 30, 2015 and $1,936,000 was a reimbursement of business operating expenses. The total deductible for the business interruption policy was approximately $948,000, which was recognized as expense in the first half of 2015. The Company had adequate property damage insurance coverage to enable it to recover the replacement cost of its property and equipment that was destroyed by the fire. During the second quarter, the Company settled property claims of $5,969,000 for property damage. The claims for property damage included $4,379,000 for inventory, contents, and repair costs, and $1,590,000 for replacement cost of a new press belt and DPA duct. The total deductible for the property policy was $1,000,000, which was recognized as expense in the first quarter of 2015. After a write-off of basis in the amount of $886,000 for the old press belt and DPA duct in the first quarter of 2015, the Company recognized a gain from involuntary conversion of assets in the amount of $704,000 which was reported in Other Operating Income in the Company’s Consolidated Statement of Income for the quarter ending June 30, 2015. In December of 2012, four lumber storage sheds at the Company’s Ola Mill were destroyed due to an accumulation of snow and ice on their roofs. Insurance policies covered the replacement cost of these sheds, subject to deductibles. The Company received a total of $881,000 in payments from the insurance company for the year ended December 31, 2013. These payments were reported in operating income as a gain on involuntary conversion in the Consolidated Statements of Income and were used to fund capital expenditures to replace the storage sheds.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Note 23 – Subsequent Events Effective January 6, 2016, Deltic entered into a second amendment to the Company’s Second Amended and Restated Revolving Credit Agreement with the consent of the lenders thereto, in which it exercised the first of its two options and extended the termination date by one year to November 17, 2020. On February 4, 2016, and pursuant to its Second Amended and Restated Revolving Credit Agreement, Deltic elected to replace two lenders in the Credit Agreement. Accordingly the respective rights and obligations of Wells Fargo Bank, NA and Branch Banking and Trust Company were assigned to one new lender, Greenstone Farm Credit Services, ACA, and one existing lender, American AgCredit, PCA, in the amounts of $27,000,000 and $123,000,000, respectively. On February 18, 2016, Deltic Timber Corporation announced that its Board of Directors had authorized management to expand the Company’s Common Stock repurchase program by $20,000,000. This authorization came as the Company had repurchased stock in an amount representing over 90 percent of the previously approved amount in its stock repurchase program.

Business Segments

Business Segments	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Business Segments	Note 24 – Business Segments The Company’s four reporting segments consist of Deltic’s three operating business units and its corporate function. Each reporting entity has a separate management team and infrastructure that offers different products or services. Woodlands operations manage the Company’s Southern Pine timberlands located primarily in Arkansas and north Louisiana and derive revenue from the harvest of timber from the timberlands in accordance with its harvest plans, and either sells timber to third parties in the domestic market or to the Company’s sawmills for conversion into lumber. In addition, this segment may, from time to time, identify and sell a portion of its timberland holdings that are either non-strategic to future timberland management activities or that have appreciated, due primarily to location, to a level that exceeds its value as a timber-growing asset. This segment also generates revenue from oil and gas royalties and the leasing of hunting, oil and gas, and other rights on its timberlands. The Manufacturing segment consists of Deltic’s two sawmills which convert timber into lumber and Del-Tin Fiber, a plant which converts sawmill residuals and an adhesive bond into MDF. The sawmills purchase timber from third parties or the Company’s Woodlands segment. The MDF plant purchases sawmill residuals from third parties and from the Company’s sawmills. The mills produce a variety of products, including dimension lumber, boards, and timbers, while the MDF plant produces several different grades of MDF. The Manufacturing segment’s products are sold primarily to wholesale distributors, large retailers, lumber treaters, industrial accounts, and manufacturers in the South and Midwest and are used in residential construction, roof trusses, remanufactured products, laminated beams, cabinets, flooring, and door parts. The Real Estate operations, which include four real estate developments, add value to former legacy timberland by developing it into upscale, planned residential and commercial developments. These developments, which are generally centered on a core amenity, are being developed in stages. Historically, real estate sales have consisted primarily of residential lots sold to builders or individuals, commercial site sales, and sales of undeveloped acreage. In addition, this segment currently leases retail and office space to third parties in a retail center constructed by the Company, and held for sale, in one of its developments. This segment also manages: (1) a real estate brokerage subsidiary which generates commission revenue by reselling existing homes and (2) a country club operation, Chenal Country Club, Inc., around which the Company’s Chenal Valley development is centered. This club operation derives its revenues from membership services, food and beverage sales, and membership dues. Corporate operations consist primarily of senior management, accounting, information systems, human resources, purchasing, treasury, income tax, and legal staff functions that provide support services to the operating business units. The Company currently does not allocate the cost of maintaining these support functions to its operating units. The accounting policies of the reportable segments are the same as those described in Note 1 – Significant Accounting Policies. The Company evaluates the performance of its segments based on operating income before results of: any equity method investee; interest income and expense; other non-operating income or expense; and income taxes. Intersegment revenues consist primarily of timber sales from the Woodlands segment to the sawmills’ operations (part of the Manufacturing segment) and are transferred at rates that approximate market for the respective operating area. Information about the Company’s business segments consisted of the following: (Thousands of dollars) 2015 2014 2013 Net sales Woodlands $ 38,770 37,008 33,834 Manufacturing 2,3 160,688 189,561 167,955 Real Estate 15,276 16,283 11,734 Eliminations 1 (20,883 ) (15,497 ) (13,821 ) $ 193,851 227,355 199,702 Income before income taxes Operating income/(loss) Woodlands $ 20,141 19,113 16,749 Manufacturing 2,3 8,381 31,440 38,496 Real Estate 453 1,115 (1,430 ) Corporate (17,325 ) (17,405 ) (17,994 ) Eliminations (632 ) 133 (158 ) Operating income 11,018 34,396 35,663 Equity in earnings of Del-Tin Fiber 2 — — 1,084 Interest income 4 5 13 Interest and other debt expense, net of capitalized interest (7,526 ) (5,430 ) (4,578 ) Gain on bargain purchase — — 3,413 Other income 258 284 3,229 $ 3,754 29,255 38,824 Total assets at year-end Woodlands $ 360,124 363,436 247,156 Manufacturing 2 92,077 80,023 85,837 Real Estate 59,744 57,646 59,549 Corporate 4 27,222 26,027 18,802 $ 539,167 527,132 411,344 Depreciation, amortization, and cost of fee timber harvested Woodlands $ 7,351 5,765 4,785 Manufacturing 2 13,315 12,147 9,910 Real Estate 367 355 343 Corporate 63 75 93 $ 21,096 18,342 15,131 (Thousands of dollars) 2015 2014 2013 Capital expenditures Woodlands $ 3,667 4,038 3,836 Manufacturing 2,3 24,363 12,311 16,532 Real Estate 8,071 3,934 4,267 Corporate 1,704 49 14 $ 37,805 20,332 24,649 Timberland acquisition expenditures $ 863 118,203 8,919 1 Primarily intersegment sales of timber from Woodlands to Manufacturing. 2 Del-Tin Fiber became a consolidated subsidiary, reported in the Manufacturing segment, upon acquisition of 100 percent interest of its ownership effective April 1, 2013. 3 During March 2015, the Company experienced a fire in the press area at its MDF plant in El Dorado that affected the operating results. 4 Includes balance of timberland sale proceeds held by trustee of $1,000 as of December 31, 2015, and there were none as of December 31, 2014 and 2013.

Financial Results by Quarter (U

Financial Results by Quarter (Unaudited)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Financial Results by Quarter (Unaudited)	Note 25 – Financial Results by Quarter (Unaudited) (Thousands of dollars, except per share amounts) 2015 First Second Third Fourth Year Net sales $ 48,379 45,681 50,150 49,641 193,851 Gross profit 9,378 7,150 5,989 5,749 28,266 Operating income 4,516 2,933 2,034 1,535 11,018 Net income 2 1,913 831 38 (128 ) 2,654 Earnings per common share Basic $ .15 .07 .00 (.01 ) .21 Assuming dilution .15 .07 .00 (.01 ) .21 Dividends paid per common share 3 $ .10 .10 .10 .10 .40 2014 First Second Third Fourth Year Net sales $ 55,379 58,605 58,301 55,070 227,355 Gross profit 13,930 14,455 14,046 10,447 52,878 Operating income 8,807 9,734 8,782 7,073 34,396 Net income 4,911 5,298 5,974 3,479 19,662 Earnings per common share Basic $ .39 .42 .47 .28 1.56 Assuming dilution .39 .42 .47 .28 1.55 Dividends paid per common share 3 $ .10 .10 .10 .10 .40 (Thousands of dollars, except per share amounts) 2013 First Second Third Fourth Year Net sales $ 41,563 53,247 56,520 48,372 199,702 Gross profit 15,384 14,648 14,810 8,977 53,819 Operating income 10,548 10,991 9,599 4,525 35,663 Net income 1 6,774 11,268 5,813 2,337 26,192 Earnings per common share Basic $ .53 .89 .46 .18 2.06 Assuming dilution .53 .88 .46 .18 2.05 Dividends paid per common share 3 $ .10 .10 .10 .10 .40 1 Del-Tin Fiber, formerly an equity investment, became a consolidated subsidiary effective April 1, 2013. Net income for the second quarter of 2013 includes a gain on bargain purchase of $3,285,000 and a gain on previously held equity investment of $3,165,000. The fourth quarter of 2013 includes additional bargain gain recognized of $128,000, for a total of $3,413,000 for the 2013 year. (For additional information, see Note 4 – Business Combinations.) 2 During March 2015, the Company experienced a fire in the press area at its MDF plant in El Dorado that affected the operating results for the second and third quarters of the year. (For additional information, see Note 22 – Business Interruption Claim and Gain of Involuntary Conversion of Assets.) 3 Payment of dividends is the means by which Deltic Timber Corporation makes distributions to its shareholders of profits and cash flows generated by the Company’s business operations. These dividends are declared by the Company’s Board of Directors on a quarterly basis. The Company’s dividend strategy is to grow the amount of the dividend over time, at a rate of increase that is believed to be sustainable. The timing and amount of future increases are based on the estimated trend for future earnings and cash flows, taking into account other potential uses of the Company’s capital resources including, but not limited to, acquisition opportunities, capital expenditures for existing operations, debt repayments, and repurchases of the Company’s common stock.

Significant Accounting Polici34

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Description of Business	Description of Business
Business Environment	Business Environment
Principles of Consolidation	Principles of Consolidation
Business Combination	Business Combinations
Use of Estimates	Use of Estimates
Cash Equivalents	Cash Equivalents
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts
Inventories	Inventories
Investment in Del-Tin Fiber	Investment in Del-Tin Fiber
Investment in Real Estate Held for Development and Sale	Investment in Real Estate Held for Development and Sale
Timber and Timberlands	Timber and Timberlands The Company classifies its timberlands and fee timber as either strategic or non-strategic. Strategic timberlands, including pine forest and pine plantations, are prime pine sawtimber-growing platforms located within or immediately adjacent to the Company sawmills’ operating regions. Deltic manages these acres using modern silviculture methods to achieve optimal volume and quality of its pine sawtimber. The Company harvests pine sawtimber and pine pulpwood in accordance with its harvest plans and generally converts pine sawtimber into lumber in its own sawmills and sells pine pulpwood, hardwood pulpwood, and hardwood sawtimber in the market. Upon harvest, strategic timberlands are reforested. The Company’s timberland acquisition program is focused on the acquisition of pine-growing timberland in its current operating regions. This investment in strategic fee timber is a “productive asset,” and any occasional sale of strategic timberland or any expenditure to acquire such timber and timberlands is included in and classified as an investing activity in the Company’s consolidated statements of cash flows. The Company has legacy hardwood and other acreage which cannot be harvested for conversion in Company sawmills, reforested as pine plantations, or managed efficiently using modern silviculture methods either due to the size of the tract or lack of proximity to other Deltic fee timberlands. These timberlands have been identified as non-strategic and/or higher and better use timberlands and are expected to be sold over time. The Company considers these sales to be an operating activity of its Woodlands segment. In order to acquire and sell assets, primarily timberlands, in a tax efficient manner, the Company enters into tax-deferred, like-kind exchange (“LKE”) transactions when possible. The Company generally enters into forward transactions, in which property is sold and the proceeds are reinvested by acquiring similar property, and reverse transactions, in which property is acquired and similar property is subsequently sold. A qualified LKE intermediary is used to facilitate LKE transactions. Proceeds from forward LKE transactions are held by the intermediary and are classified as restricted cash, because the funds must be reinvested in similar properties. If the acquisition of suitable LKE properties is not completed within 180 days of the sale of the Company-owned property, the proceeds are distributed to Deltic by the intermediary and are reclassified as available cash, and applicable income taxes are determined. Amounts deposited with a third party towards the potential future purchase of property are included in deferred charges and other assets in the consolidated balance sheets and as an investing activity as changes in funds held by trustee in the consolidated statements of cash flows. The Company had $1,000 of proceeds from land sales deposited with an LKE intermediary at December 31, 2015 and none at December 31, 2014. An exchange accommodation titleholder, a type of variable interest entity, is used to facilitate reverse like-kind exchanges. The acquired assets are held by the exchange accommodation titleholder until the exchange transactions are complete. If the Company determines that it is the primary beneficiary of the exchange accommodation titleholder, Deltic includes the assets held by the exchange accommodation titleholder in timber and timberlands assets on the consolidated balance sheets and recognizes any income or expense attributed to the property in the consolidated income statements.
Property, Plant, and Equipment	Property, Plant, and Equipment Property, plant, and equipment assets are evaluated for possible impairment on a specific asset basis or in groups of similar assets, as applicable, whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future net cash flows to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment loss is recognized for the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of are reported at the lower of the carrying amount or fair value less costs to sell, and depreciation ceases.
Revenue Recognition	Revenue Recognition Revenue from the leasing of land for hunting purposes is deferred when received and subsequently recognized over the one-year lease term, which begins September 1 of each year. At December 31, 2015 and 2014, the Company had deferred hunting lease revenue totaling $2,060,000 and $2,009,000, respectively, reflected in the consolidated balance sheets in deferred revenues and other accrued liabilities. Revenue from mineral lease rental payments is deferred when received and recognized ratably over the lease term. At December 31, 2015 and 2014, the Company had deferred mineral lease revenue of $446,000 and $1,140,000, respectively, of which $115,000 and $383,000 were included in other noncurrent liabilities for 2015 and 2014, respectively, and $331,000 and $757,000 were included in other current liabilities, respectively. Mineral royalty payments are recognized when received. Revenue from sales of timberland and real estate is recorded when the sale is closed and legal title is transferred and the buyer’s initial and continuing investment is adequate, which is generally at the time the purchaser executes the real estate closing documents and makes payment to the title company handling the closing.
Income Taxes	Income Taxes
Property Taxes	Property Taxes
Share-Based Compensation	Share-Based Compensation
Pensions and Other Postretirement Benefits	Pensions and Other Postretirement Benefits The Company also sponsors a defined benefit health care plan and a life insurance benefit plan for all eligible retired employees, excluding employees of the subsidiaries. The Company measures the costs of its obligations for these plans based on its health care cost trends and actuarial assumptions, including discount rates, mortality rates, assumed rates of return, compensation increases, and turnover rates. The Company reviews its assumptions on an annual basis and makes modifications to the assumptions based on current rates and trends when it is appropriate to do so. The effect of modifications to those assumptions is recorded in accumulated other comprehensive income/(loss) and amortized to net periodic cost over future periods using the corridor method. The Company believes that the assumptions utilized in recording its obligations under its plans are reasonable based on its experience and market conditions. Net periodic costs are recognized as employees render the services necessary to earn these post- retirement benefits. (For additional information, see Note 17 – Employee and Retiree Benefit Plans.)
Advertising Costs	Advertising Costs
Capitalized Interest	Capitalized Interest
Timberland Acquisition Expenditures	Timberland Acquisition Expenditures
Capital Expenditures	Capital Expenditures
Net Change in Purchased Stumpage Inventory	Net Change in Purchased Stumpage Inventory
Earnings per Common Share	Earnings per Common Share
Shipping and Handling Costs	Shipping and Handling Costs
Off-Balance Sheet Arrangements	Off-Balance Sheet Arrangements
Effect of Recently Issued Authoritative Accounting Guidance	Effect of Recently Issued Authoritative Accounting Guidance In April 2015, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2015-03, “Interest: Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs,” which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying value of the associated debt liability, consistent with the presentation of a debt discount. In August 2015, FASB issued ASU No. 2015-15, “Interest: Imputation of Interest Presentation and Subsequent Measurement of Debt Insurance Costs Associated with Line-of-Credit Arrangements.” which amended ASU 2015-03 and provided guidance that debt issuance costs associated with line-of-credit In July 2015, FASB issued ASU 2015-11, “Inventory (Topic 330): Simplifying the Measurement of Inventory,” which changes the measurement principle for inventory from the lower of cost or market to lower of cost and net realizable value for entities that do not measure inventory using either the last-in, In November 2015, FASB issued ASU 2015-17, “Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes,” which requires entities with a classified balance sheet to present all deferred tax assets and liabilities as non-current. The ASU is effective for the Company on January 1, 2017.

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventories	Inventories at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Raw materials - Logs $ 1,975 772 - Del-Tin – wood fiber 615 384 Finished goods - Lumber 4,142 4,168 - Medium density fiberboard (“MDF”) 2,516 3,889 - MDF consigned to others 1,031 926 Supplies 1,638 1,355 $ 11,917 11,494

Prepaid Expenses and Other Cu36

Prepaid Expenses and Other Current Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Short-term deferred tax assets $ 2,131 2,087 Refundable income taxes 3,062 2,537 Prepaid expenses 687 654 Other current assets 512 619 $ 6,392 5,897

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Purchase Price Allocated to Net Tangible and Intangible Assets	The purchase price allocated to the net tangible and intangible assets acquired and liabilities assumed based on their fair values as of the acquisition date and the calculation of the gain on bargain purchase were as follows: (Thousands of dollars) Accounts receivable $ 4,229 Inventories 4,805 Other current assets 360 Property, plant, and equipment 40,960 Intangible assets 1 1,700 Other assets 171 Current liabilities (1,653 ) Deferred tax liabilities (2,203 ) Long-term liabilities (29,000 ) Net assets acquired 19,369 Cash paid (5,170 ) Fair value of previously held investment in Del-Tin Fiber (10,786 ) Gain on bargain purchase $ 3,413 1 The acquired intangible assets consist of internally developed software which is being amortized over three years.
Summarizes Combined Results of Operations on Pro Forma Basis	This information is based on historical results of operations, adjusted for certain acquisition accounting adjustments, and does not purport to represent Deltic’s actual results of operations as if the acquisition transaction described above would have occurred as of January 1, 2012, nor is it necessarily indicative of future results. Twelve Months Ended December 31, (Thousands of dollars, except per share amounts) 2013 Net sales $ 217,268 Net income 21,193 Basic earnings per common share 1.69 Diluted earnings per common share 1.68

Timber and Timberlands (Tables)

Timber and Timberlands (Tables)	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Summary of Timber and Timberlands	Timber and timberlands at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Purchased stumpage inventory $ 2,437 1,620 Timberlands 155,997 155,704 Fee timber 326,327 322,714 Logging facilities 1,221 2,720 485,982 482,758 Less accumulated cost of fee timber harvested and facilities depreciation (124,292 ) (118,670 ) Strategic timber and timberlands 361,690 364,088 Non-strategic timber and timberlands 166 322 $ 361,856 364,410

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	Property, plant, and equipment at December 31 consisted of the following: (Thousands of dollars) Range of Useful Lives 2015 2014 Land N/A $ 947 947 Land improvements 10-20 years 10,409 8,163 Buildings and structures 10-20 years 23,900 22,680 Machinery and equipment 3-15 years 158,385 152,641 193,641 184,431 Less accumulated depreciation (108,146 ) (110,267 ) $ 85,495 74,164

Deferred Revenues and Other A40

Deferred Revenues and Other Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2015
Payables and Accruals [Abstract]
Deferred Revenues and Other Accrued Liabilities	Deferred revenues and other accrued liabilities at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Deferred revenues – current $ 2,877 3,310 Vacation accrual 1,360 1,312 Deferred compensation 619 1,166 All other current liabilities 2,751 1,435 $ 7,607 7,223

Other Noncurrent Liabilities (T

Other Noncurrent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2015
Payables and Accruals [Abstract]
Other Noncurrent Liabilities	Other noncurrent liabilities at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Accumulated postretirement benefit obligation $ 12,295 12,343 Excess retirement plan 12,764 9,372 Accrued pension liability 15,698 14,955 Deferred revenue – long-term portion 115 383 All other noncurrent payables 1,487 2,287 $ 42,359 39,340

Change in Accounting Principle

Change in Accounting Principle (Tables)	12 Months Ended
	Dec. 31, 2015
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
Summary of Adjustments	A summary of the adjustments is presented below: (Thousands of dollars) Previous Accounting Method 2015 Effect of Change in Accounting Principle As Reported 2015 Prepaid expenses and other current assets $ 6,475 (83 ) 6,392 Deferred charges and other assets $ 2,829 (164 ) 2,665 Current maturities, debt $ 40,000 (83 ) 39,917 Long-term debt $ 184,000 (164 ) 183,836 (Thousands of dollars) As Previously Reported 2014 Effect of Change in Accounting Principle As Currently Reported 2014 Prepaid expenses and other current assets $ 5,964 (67 ) 5,897 Deferred charges and other assets $ 3,250 (70 ) 3,180 Long-term debt $ 203,000 (137 ) 202,863

Indebtedness (Tables)

Indebtedness (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Company's Indebtedness	The Company’s indebtedness at December 31 consisted of the following: (Thousands of dollars) 2015 2014 Notes payable, 2.01%¹, due 2019 (See Note 10 – Credit Facilities) $ 55,000 134,000 Senior notes payable, 6.10%, due 2016 40,000 40,000 Term loan credit agreement, 4.05%, due 2025 100,000 — Union County, Arkansas Taxable Industrial Revenue Bonds, .23%², due 2027 29,000 29,000 224,000 203,000 Less unamortized debt issuance costs (247 ) (137 ) Total debt, net 223,753 202,863 Less current maturities (39,917 ) — Long term debt $ 183,836 202,863 ¹ Weighted average interest rate for Notes payable at December 31, 2015 and 2014 was 2.01% and 1.67%, respectively. ² Weighted average interest rate for Bonds at December 31, 2015 and 2014 was .23% and .29%, respectively.
Ratio Requirements for Revolving Credit Facility, Senior Notes Payable and Term Loan Credit Agreement	The table below sets forth the ratio requirements of the covenants in the revolving credit facility, Senior Notes Payable, and the Term Loan Credit Agreement and the status with respect to these covenants as of December 31, 2015 and 2014. Covenants Actual Ratios at Actual Ratios at Leverage ratio should be less than: 1 .65 to 1 .469 to 1 .432 to 1 Total outstanding debt as a percentage of total debt allowed based on the minimum timber market value covenant: 2 — 2 74.01 % 74.94 % 1 The leverage ratio is calculated as total debt divided by total capital employed. Total debt includes indebtedness for borrowed money, secured liabilities, obligations in respect of letters of credit, and guarantees. Total capital employed is the sum of total debt and net worth. Net worth is calculated as total assets minus total liabilities, as reflected on the balance sheet. This covenant is applied at the end of each quarter. 2 Timber market value must be greater than 175 percent of total debt (as defined in (1) above). The timber market value is calculated by multiplying the average price received for sales of timber for the preceding four quarters by the current quarter’s ending inventory of timber. This covenant is applied at the end of the quarter on a rolling four-quarter basis.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense/(Benefit)	The components of income tax expense/(benefit) related to pre-tax income for the years ended December 31, 2015, 2014, and 2013 are as follows: (Thousands of dollars) 2015 2014 2013 Federal Current $ 1,508 9,959 10,237 Deferred (590 ) (961 ) 138 918 8,998 10,375 State Current 510 887 2,154 Deferred (328 ) (292 ) 103 182 595 2,257 Total income tax expense $ 1,100 9,593 12,632
Schedule of Reconciliation of Income Tax Expense	The following table provides a reconciliation of the Company’s income tax expense at the statutory U.S. federal rate of 35 percent to the actual income tax expense for the years ended December 31, 2015, 2014, and 2013. (Thousands of dollars) 2015 2014 2013 U.S. federal income tax using statutory tax rate $ 1,260 10,239 13,588 State tax, net of federal tax benefit 121 1,130 1,458 Permanent differences (89 ) (1,000 ) (1,219 ) Tax effects resulting from: Rate difference on timber gains (192 ) — — Gain on bargain purchase — — (1,195 ) Reversal of uncertain state income tax position — (776 ) — Income tax provision as reported $ 1,100 9,593 12,632
Schedule of Deferred Tax Assets and Deferred Tax Liabilities	The Company’s deferred tax assets and deferred tax liabilities at December 31, 2015 and 2014 consisted of the following: (Thousands of dollars) 2015 2014 Deferred tax assets Investment in real estate held for development and sale $ 17,564 17,286 Postretirement and other employee benefits 21,725 20,086 Other deferred tax assets 1,861 2,093 Total deferred tax assets 41,150 39,465 Deferred tax liabilities Timber and timberlands (27,950 ) (27,191 ) Property, plant, and equipment (11,370 ) (11,021 ) Other deferred tax liabilities (224 ) (268 ) Total deferred tax liabilities (39,544 ) (38,480 ) Net deferred tax assets/(liabilities) $ 1,606 985
Schedule of Deferred Tax Assets and Liabilities Classified in Accompanying Consolidated Balance Sheets	The deferred tax assets and liabilities are classified in the accompanying consolidated balance sheets as follows: (Thousands of dollars) 2015 2014 Current tax assets $ 2,131 2,087 Long-term tax liabilities (525 ) (1,102 ) Net deferred tax assets/(liabilities) $ 1,606 985
Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits	There were no unrecognized tax benefits at December 31, 2015 or 2014 and a reconciliation of the beginning and ending amount of unrecognized tax benefits for the period ending December 31, 2014 (excluding both interest and any related federal benefits) is as follows: (Thousands of dollars) 2014 Balance at January 1 $ 1,185 Lapse of statute (1,185 ) Balance at December 31 $ —

Fair Value of Financial Instr45

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements for Financial Liabilities Accounted on a Recurring Basis	The fair value measurements for the Company’s financial liabilities accounted for at fair value on a recurring basis at December 31, 2015 are presented in the following table: Fair Value Measurements at Reporting Date Using December 31, Quoted Prices in Significant Significant (Thousands of dollars) 2015 Level 1 Level 2 Level 3 Liabilities Nonqualified employee savings plan $ 1,488 1,488 — —
Carrying Amounts and Estimated Fair Values of Financial Instruments	The table excludes financial instruments included in current assets and liabilities, except current maturities of long-term debt, all of which have fair values approximating carrying values. 2015 2014 (Thousands of dollars) Carrying Estimated Carrying Estimated Financial liabilities Long-term debt, including current maturities $ 223,753 225,123 202,863 207,077

Other Comprehensive Income Di46

Other Comprehensive Income Disclosures (Tables)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Changes in Accumulated Other Comprehensive Loss by Component (Net of Tax)	Changes in Accumulated Other Comprehensive Loss by Component (Net of Tax) (Thousands of dollars) Defined Benefit Funded Retirement Plan Defined Benefit Unfunded Retirement Plan Post- Benefit Plan Total AOCL at January 1, 2015 $ (7,615 ) (3,064 ) (732 ) (11,411 ) Amounts reclassified from AOCL 512 369 20 901 Net gain/(loss) arising during period 32 (1,614 ) 498 (1,084 ) Net current period other comprehensive income/(loss) 544 (1,245 ) 518 (183 ) AOCL at December 31, 2015 $ (7,071 ) (4,309 ) (214 ) (11,594 ) (Thousands of dollars) Defined Benefit Funded Retirement Plan Defined Benefit Unfunded Retirement Plan Post- Benefit Plan Total AOCL at January 1, 2014 $ (2,410 ) (482 ) 213 (2,679 ) Amounts reclassified from AOCL 111 173 (121 ) 163 Net loss arising during period (5,316 ) (2,755 ) (824 ) (8,895 ) Net current period other comprehensive loss (5,205 ) (2,582 ) (945 ) (8,732 ) AOCL at December 31, 2014 $ (7,615 ) (3,064 ) (732 ) (11,411 ) (Thousands of dollars) Defined Benefit Funded Retirement Plan Defined Benefit Unfunded Retirement Plan Post- Benefit Plan Total AOCL at January 1, 2013 $ (9,553 ) (3,380 ) (1,170 ) (14,103 ) Amounts reclassified from AOCL 529 38 (116 ) 451 Net gain arising during period 6,614 2,860 1,499 10,973 Net current period other comprehensive income 7,143 2,898 1,383 11,424 AOCL at December 31, 2013 $ (2,410 ) (482 ) 213 (2,679 )
Reclassification Out of Accumulated Other Comprehensive Loss	Reclassification Out of Accumulated Other Comprehensive Loss Details about AOCL Components For the Year Ended December 31, 2015 (Thousands of dollars) Defined Defined Post- Total Amortization of prior service costs $ 4 — — 4 Amortization of actuarial losses 839 607 79 1,525 Amortization of plan amendment — — (46 ) (46 ) Total before tax 843 607 33 1,483 Income tax benefit/(expense) (331 ) (238 ) (13 ) (582 ) Total reclassifications – net of tax $ 512 369 20 901 For the Year Ended December 31, 2014 (Thousands of dollars) Defined Defined Post- Total Amortization of prior service costs $ 17 (7 ) — 10 Amortization of actuarial losses 165 292 — 457 Amortization of plan amendment — — (199 ) (199 ) Total before tax 182 285 (199 ) 268 Income tax benefit/(expense) (71 ) (112 ) 78 (105 ) Total reclassifications – net of tax $ 111 173 (121 ) 163 Amounts in parentheses indicate expenses. These items are included in the computation of net periodic retirement and postretirement costs. See Note 17 – Employee and Retiree Benefit Plans. For the Year Ended December 31, 2013 (Thousands of dollars) Defined Defined Benefit Post- Total Amortization of prior service costs $ 18 (11 ) — 7 Amortization of actuarial losses 852 74 8 934 Amortization of plan amendment — — (199 ) (199 ) Total before tax 870 63 (191 ) 742 Income tax benefit/(expense) (341 ) (25 ) 75 (291 ) Total reclassifications – net of tax $ 529 38 (116 ) 451 Amounts in parentheses indicate expenses. These items are included in the computation of net periodic retirement and postretirement costs. See Note 17 – Employee and Retiree Benefit Plans.
Tax Effects by Component	Tax Effects by Component For the Year Ended December 31, 2015 (Thousands of dollars) Before Tax Net of Gains/(losses) arising during the period $ (1,784 ) 700 (1,084 ) Amortization of prior service costs 4 (2 ) 2 Amortization of actuarial losses/(gains) 1,525 (598 ) 927 Amortization of plan amendment (46 ) 18 (28 ) $ (301 ) 118 (183 ) For the Year Ended December 31, 2014 (Thousands of dollars) Before Tax Net of Gains/(losses) arising during the period $ (14,636 ) 5,741 (8,895 ) Amortization of prior service costs 10 (4 ) 6 Amortization of actuarial losses/(gains) 457 (179 ) 278 Amortization of plan amendment (199 ) 78 (121 ) $ (14,368 ) 5,636 (8,732 ) For the Year Ended December 31, 2013 (Thousands of dollars) Before Tax Net of Gains/(losses) arising during the period $ 18,054 (7,081 ) 10,973 Amortization of prior service costs 7 (3 ) 4 Amortization of actuarial losses/(gains) 934 (366 ) 568 Amortization of plan amendment (199 ) 78 (121 ) $ 18,796 (7,372 ) 11,424

Employee and Retiree Benefit 47

Employee and Retiree Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Plan Benefit Obligations, Fair Value of Plan Assets, and Funded Status	The following table sets forth the plans’ benefit obligations, fair value of plan assets, and funded status at December 31, 2015 and 2014. Defined Benefit Funded Retirement Plan Defined Benefit Plan Other Postretirement Plan (Thousands of dollars) 2015 2014 2015 2014 2015 2014 Change in benefit obligation Benefit obligation at beginning of period $ 47,750 37,010 9,644 4,690 12,698 10,756 Service cost 1,959 1,476 518 302 527 418 Interest cost 2,021 1,839 494 373 559 497 Participant contributions — — — — 92 88 Actuarial (gain)/loss (2,406 ) 8,626 2,655 4,534 (819 ) 1,355 Benefits paid (1,266 ) (1,201 ) (275 ) (255 ) (382 ) (416 ) Benefit obligation at end of period $ 48,058 47,750 13,036 9,644 12,675 12,698 Change in plan assets Fair value of plan assets at beginning of period $ 32,795 30,627 — — — — Actual return on plan assets 240 2,327 — — — — Employer contributions 775 1,200 275 255 290 328 Participant contributions — — — — 92 88 Benefits paid (1,266 ) (1,201 ) (275 ) (255 ) (382 ) (416 ) Expenses (184 ) (158 ) — — — — Fair value of plan assets at end of period $ 32,360 32,795 — — — — Funded status of plans $ (15,698 ) (14,955 ) (13,036 ) (9,644 ) (12,675 ) (12,698 ) Amounts recognized in the balance sheet Current liability $ — — (272 ) (272 ) (380 ) (355 ) Noncurrent liability $ (15,698 ) (14,955 ) (12,764 ) (9,372 ) (12,295 ) (12,343 ) Deferred income taxes – net $ 6,157 5,866 5,113 3,783 4,647 4,981 Accumulated other comprehensive (income)/loss $ 7,071 7,615 4,308 3,064 215 732 Amounts recognized in accumulated other comprehensive loss Net unrecognized (gain)/loss $ 11,633 12,525 7,088 5,041 334 1,231 Unrecognized prior service cost/(credit) — 4 — — — (46 ) Tax effects (4,562 ) (4,914 ) (2,780 ) (1,977 ) (119 ) (453 ) $ 7,071 7,615 4,308 3,064 215 732 Defined Benefit Retirement Plan Defined Benefit Retirement Plan Other Plan (Thousands of dollars) 2015 2014 2015 2014 2015 2014 Assumptions used in measurement of benefit obligations Weighted average discount rate 4.47 % 4.21 % 4.47 % 4.21 % 4.50 % 4.25 % Rate of compensation increase 4.00 % 4.00 % 5.00 % 4.00 % N/A N/A Accumulated benefit obligations at year end $ 42,829 40,720 8,813 6,792 N/A N/A
Retirement Expense and Other Postretirement Benefits Expense	Components of net periodic retirement expense and other postretirement benefits expense consisted of the following: (Thousands of dollars) 2015 2014 2013 Defined benefit funded retirement plan Service cost $ 1,959 1,476 1,549 Interest cost 2,021 1,839 1,557 Expected return on plan assets (2,410 ) (2,290 ) (1,894 ) Amortization of prior service cost 4 17 18 Amortization of actuarial loss 839 165 852 Net periodic benefit cost $ 2,413 1,207 2,082 Defined benefit unfunded retirement plan Service cost $ 518 302 143 Interest cost 494 373 193 Amortization of prior service credit — (7 ) (11 ) Amortization of actuarial loss 607 292 74 Net periodic benefit cost $ 1,619 960 399 Other postretirement benefit plan Service cost $ 527 418 450 Interest cost 559 497 431 Amortization of prior service credit (46 ) (199 ) (199 ) Amortization of actuarial loss 79 — 8 Net periodic benefit cost $ 1,119 716 690
Assumptions Used to Determine Net Periodic Benefit Cost - Pension Plans	(Thousands of dollars) 2015 2014 2013 Assumptions used to determine net periodic benefit cost – defined benefit pension plans Weighted average discount rate 4.21 % 4.84 % 3.94 % Expected long-term rate of return on plan assets 7.50 % 7.50 % 7.50 % Rate of compensation increase 4.00 % 4.00 % 4.00 % Assumptions used to determine net periodic benefit cost – other postretirement plan Weighted average discount rate 4.25 % 4.85 % 3.90 % Other changes in plan assets and benefit obligations recognized in other comprehensive (income)/loss Net unrecognized loss/(gain) $ 1,784 14,636 (18,054 ) Amortization of prior service credit (4 ) (10 ) (7 ) Amortization of actuarial losses (1,525 ) (457 ) (934 ) Amortization of plan amendment 46 199 199 Tax effect of changes (118 ) (5,636 ) 7,372 Total recognized in other comprehensive (income)/loss $ 183 8,732 (11,424 )
Estimated Benefit Payments by Year	(Thousands of dollars) 2015 2014 2013 Assumptions used to determine net periodic benefit cost – defined benefit pension plans Weighted average discount rate 4.21 % 4.84 % 3.94 % Expected long-term rate of return on plan assets 7.50 % 7.50 % 7.50 % Rate of compensation increase 4.00 % 4.00 % 4.00 % Assumptions used to determine net periodic benefit cost – other postretirement plan Weighted average discount rate 4.25 % 4.85 % 3.90 % Other changes in plan assets and benefit obligations recognized in other comprehensive (income)/loss Net unrecognized loss/(gain) $ 1,784 14,636 (18,054 ) Amortization of prior service credit (4 ) (10 ) (7 ) Amortization of actuarial losses (1,525 ) (457 ) (934 ) Amortization of plan amendment 46 199 199 Tax effect of changes (118 ) (5,636 ) 7,372 Total recognized in other comprehensive (income)/loss $ 183 8,732 (11,424 ) (Thousands of dollars) Defined Benefit Defined Other Estimated benefit payments by year 2016 $ 1,434 272 380 2017 1,563 269 426 2018 1,722 266 465 2019 1,883 263 516 2020 2,099 259 553 2021 – 2025 13,355 4,655 3,225
Fair Value Investments Plan	The following table sets forth by level within the fair value hierarchy the Plan’s investments at fair value as of December 31, 2015. Fair Value Measurements at Reporting Date Using (Thousands of dollars) Percent Total Total Carrying Value at Dec. 31, 2015 Level 1 Level 2 Level 3 Plan Investments Cash and cash equivalents 2.3 $ 738 738 — — Other .1 46 46 — — U.S. Govt. and agency securities 15.7 5,093 2,901 2,192 — Corporate debt obligations 9.7 3,144 — 3,144 — Municipal debt obligations .3 95 — 95 — Mutual funds: Dividends and growth 34.2 11,057 11,057 — — International and emerging markets 5.4 1,739 1,739 — — Fixed income 2.3 733 733 — — Exchange-traded funds 22.1 7,148 7,148 — — Alternative investment funds 7.9 2,567 — — 2,567 Total plan investments at fair value 100.0 $ 32,360 24,362 5,431 2,567 Percent of fair value hierarchy 100 75.3 16.8 7.9 The following table sets forth by level within the fair value hierarchy the Plan’s investments at fair value as of December 31, 2014. Fair Value Measurements at Reporting Date Using (Thousands of dollars) Percent Total Level 1 Level 2 Level 3 Plan Investments Cash and cash equivalents 4.5 $ 1,470 1,470 — — Other .1 40 40 — — Equity securities by sector: Energy .3 105 105 — — Materials and industrials 2.0 652 652 — — Consumer 3.9 1,274 1,274 — — Health care 2.6 854 854 — — Financials .6 201 201 — — Information tech 4.6 1,503 1,503 — — Foreign stocks 1.0 319 319 — — U.S. Govt. and agency securities 15.2 5,001 3,208 1,793 — Corporate debt obligations 7.2 2,370 — 2,370 — Mutual funds: Dividends and growth 28.4 9,327 9,327 — — International and emerging markets 5.6 1,835 1,835 — — Fixed income 2.3 742 742 — — Exchange-traded funds 15.0 4,913 4,913 — — Alternative investment funds 6.7 2,189 — — 2,189 Total plan investments at fair value 100.0 $ 32,795 26,443 4,163 2,189 Percent of fair value hierarchy 100 80.6 12.7 6.7
Activity in Level 3 Investments	The following table sets forth the activity in the Level 3 investments for the year ended December 31, 2015. Fair Value Measurements (Level 3) (Thousands of dollars) Alternative Investment Beginning balance at December 31, 2014 $ 2,189 Actual return on plan assets: Relating to assets still held at the reporting date (122 ) Purchases, sales, and settlements 500 Ending balance at December 31, 2015 $ 2,567 The following table sets forth the activity in the Level 3 investments for the year ended December 31, 2014. Fair Value Measurements (Thousands of dollars) Alternative Investment Beginning balance at December 31, 2013 $ 2,077 Actual return on plan assets: Relating to assets still held at the reporting date 112 Purchases, sales, and settlements — Ending balance at December 31, 2014 $ 2,189

Incentive Plans (Tables)

Incentive Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Valuation of Stock Options and Restricted Stock Performance Units	Assumptions for the 2015, 2014, and 2013 valuation of stock options and restricted stock performance units consisted of the following: 2015 2014 2013 Expected term of options (in years) 6.27 6.27 6.27 Weighted expected volatility 38.64 % 37.38 % 37.78 % Dividend yield .56 % .55 % .58 % Risk-free interest rate - performance restricted shares 1.15 % 1.23 % .60 % Risk-free interest rate - stock options 1.92 % 2.99 % 1.98 % Stock price as of valuation date $ 65.89 63.21 71.35 Restricted performance share valuation $ 77.52 80.56 87.74 Grant date fair value - stock options $ 24.40 21.87 26.20
Summary of Stock Options	A summary of stock options as of December 31, 2015, and changes during the year ended are presented below: Shares Weighted Weighted Aggregate Outstanding at January 1, 2015 151,753 $ 60.99 Granted 22,494 65.89 Exercised (24,897 ) 48.11 Forfeited/expired (1,480 ) 65.51 Outstanding at December 31, 2015 147,870 $ 63.86 6.2 $ 182 Exercisable at December 31, 2015 87,795 $ 62.17 4.9 $ 182
Summary of Stock Options Outstanding	Additional information about stock options outstanding at December 31, 2015, consisted of the following: Options Outstanding Options Exercisable Range of Exercise Prices Number Average Average Number Average $31.00—$35.00 658 3.1 $ 34.41 658 $ 34.41 $41.00—$45.00 2,774 4.1 $ 44.84 2,774 $ 44.84 $51.00—$55.00 20,230 1.3 $ 52.59 20,230 $ 52.59 $56.00—$65.00 51,995 6.6 $ 63.38 32,664 $ 63.47 $66.00—$75.00 72,213 7.4 $ 68.36 31,469 $ 69.09 147,870 87,795
Summary of Nonvested Restricted Stock	A summary of nonvested restricted stock as of December 31, 2015, and changes during the year then-ended are presented below: Shares Weighted Grant-Date Nonvested at January 1, 2015 85,410 $ 66.51 Granted 21,005 66.06 Vested (18,682 ) 63.54 Forfeited (628 ) 67.00 Nonvested at December 31, 2015 87,105 $ 67.04
Summary of Nonvested Restricted Stock Performance Units	A summary of nonvested restricted stock performance units as of December 31, 2015, and changes during the year then-ended are presented below: Shares Weighted Grant-Date Nonvested at January 1, 2015 56,586 $ 85.78 Granted 20,297 77.52 Units not meeting vesting conditions (12,135 ) 85.56 Forfeited (848 ) 83.06 Nonvested at December 31, 2015 63,900 $ 83.24

Supplemental Cash Flows Discl49

Supplemental Cash Flows Disclosures (Tables)	12 Months Ended
	Dec. 31, 2015
Supplemental Cash Flow Elements [Abstract]
Interest and Income Taxes Information Concerning Cash Flows	Additional information concerning cash flows at December 31 consisted of the following: (Thousands of dollars) 2015 2014 2013 Income taxes paid in cash $ 2,517 14,976 11,042 Interest paid 5,679 5,420 3,954 Interest capitalized (103 ) (70 ) (53 )
Non-cash Investing and Financing Activities	Non-cash investing and financing activities excluded from the Consolidated Statement of Cash Flows include: (Thousands of dollars) 2015 2014 2013 Issuance of restricted stock $ 1,677 1,290 935 Capital expenditures accrued, not paid 1,603 738 1,271 Timberland exchanges 39 — — Fair value of Del-Tin Fiber net assets acquired — — 19,369
(Increases)/Decreases in Operating Working Capital, Other Than Cash and Cash Equivalents	(Increases)/decreases in operating working capital, other than cash and cash equivalents, for each of the three years ended December 31 consisted of the following: (Thousands of dollars) 2015 2014 2013 Trade accounts receivable $ 2,091 (1,756 ) 2,178 Other receivables (11 ) 8 (6 ) Inventories (423 ) 945 (2,740 ) Prepaid expenses and other current assets (441 ) (2,543 ) (184 ) Trade accounts payable 420 (2,123 ) 3,701 Accrued taxes other than income taxes (31 ) (61 ) 216 Deferred revenues and other accrued liabilities 1,302 (3,644 ) 2,718 $ 2,907 (9,174 ) 5,883

Earnings per Share (Tables)

Earnings per Share (Tables)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Computation of Earnings Per Share	The amounts used in computing earnings per share and the effect on income and weighted-average number of shares outstanding of dilutive potential common stock consisted of the following at December 31: (Thousands of dollars, except per share amounts) 2015 2014 2013 Net earnings allocated to common stock $ 2,623 19,445 25,924 Net earnings allocated to participating securities 31 217 268 Net income allocated to common stock and participating securities $ 2,654 19,662 26,192 Weighted average number of common shares used in basic EPS 12,407 12,497 12,566 Effect of dilutive stock awards 60 56 58 Weighted average number of common shares and dilutive potential common stock used in EPS assuming dilution 12,467 12,553 12,624 Earnings per common share Basic $ .21 1.56 2.06 Assuming dilution $ .21 1.55 2.05
Information about Potentially Dilutive Securities Outstanding	The following table provides information about potentially dilutive securities that were outstanding but were not included in the computation of diluted earnings per share, because they were anti-dilutive or, in the case of the restricted performance shares, did not meet the metrics established for awarding: 2015 2014 2013 Options 72,213 76,968 50,197 Restricted performance shares 63,900 56,586 52,625

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Summary of Company's Business Segments	Information about the Company’s business segments consisted of the following: (Thousands of dollars) 2015 2014 2013 Net sales Woodlands $ 38,770 37,008 33,834 Manufacturing 2,3 160,688 189,561 167,955 Real Estate 15,276 16,283 11,734 Eliminations 1 (20,883 ) (15,497 ) (13,821 ) $ 193,851 227,355 199,702 Income before income taxes Operating income/(loss) Woodlands $ 20,141 19,113 16,749 Manufacturing 2,3 8,381 31,440 38,496 Real Estate 453 1,115 (1,430 ) Corporate (17,325 ) (17,405 ) (17,994 ) Eliminations (632 ) 133 (158 ) Operating income 11,018 34,396 35,663 Equity in earnings of Del-Tin Fiber 2 — — 1,084 Interest income 4 5 13 Interest and other debt expense, net of capitalized interest (7,526 ) (5,430 ) (4,578 ) Gain on bargain purchase — — 3,413 Other income 258 284 3,229 $ 3,754 29,255 38,824 Total assets at year-end Woodlands $ 360,124 363,436 247,156 Manufacturing 2 92,077 80,023 85,837 Real Estate 59,744 57,646 59,549 Corporate 4 27,222 26,027 18,802 $ 539,167 527,132 411,344 Depreciation, amortization, and cost of fee timber harvested Woodlands $ 7,351 5,765 4,785 Manufacturing 2 13,315 12,147 9,910 Real Estate 367 355 343 Corporate 63 75 93 $ 21,096 18,342 15,131 (Thousands of dollars) 2015 2014 2013 Capital expenditures Woodlands $ 3,667 4,038 3,836 Manufacturing 2,3 24,363 12,311 16,532 Real Estate 8,071 3,934 4,267 Corporate 1,704 49 14 $ 37,805 20,332 24,649 Timberland acquisition expenditures $ 863 118,203 8,919 1 Primarily intersegment sales of timber from Woodlands to Manufacturing. 2 Del-Tin Fiber became a consolidated subsidiary, reported in the Manufacturing segment, upon acquisition of 100 percent interest of its ownership effective April 1, 2013. 3 During March 2015, the Company experienced a fire in the press area at its MDF plant in El Dorado that affected the operating results. 4 Includes balance of timberland sale proceeds held by trustee of $1,000 as of December 31, 2015, and there were none as of December 31, 2014 and 2013.

Financial Results by Quarter 52

Financial Results by Quarter (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Results	2015 First Second Third Fourth Year Net sales $ 48,379 45,681 50,150 49,641 193,851 Gross profit 9,378 7,150 5,989 5,749 28,266 Operating income 4,516 2,933 2,034 1,535 11,018 Net income 2 1,913 831 38 (128 ) 2,654 Earnings per common share Basic $ .15 .07 .00 (.01 ) .21 Assuming dilution .15 .07 .00 (.01 ) .21 Dividends paid per common share 3 $ .10 .10 .10 .10 .40 2014 First Second Third Fourth Year Net sales $ 55,379 58,605 58,301 55,070 227,355 Gross profit 13,930 14,455 14,046 10,447 52,878 Operating income 8,807 9,734 8,782 7,073 34,396 Net income 4,911 5,298 5,974 3,479 19,662 Earnings per common share Basic $ .39 .42 .47 .28 1.56 Assuming dilution .39 .42 .47 .28 1.55 Dividends paid per common share 3 $ .10 .10 .10 .10 .40 (Thousands of dollars, except per share amounts) 2013 First Second Third Fourth Year Net sales $ 41,563 53,247 56,520 48,372 199,702 Gross profit 15,384 14,648 14,810 8,977 53,819 Operating income 10,548 10,991 9,599 4,525 35,663 Net income 1 6,774 11,268 5,813 2,337 26,192 Earnings per common share Basic $ .53 .89 .46 .18 2.06 Assuming dilution .53 .88 .46 .18 2.05 Dividends paid per common share 3 $ .10 .10 .10 .10 .40 1 Del-Tin Fiber, formerly an equity investment, became a consolidated subsidiary effective April 1, 2013. Net income for the second quarter of 2013 includes a gain on bargain purchase of $3,285,000 and a gain on previously held equity investment of $3,165,000. The fourth quarter of 2013 includes additional bargain gain recognized of $128,000, for a total of $3,413,000 for the 2013 year. (For additional information, see Note 4 – Business Combinations.) 2 During March 2015, the Company experienced a fire in the press area at its MDF plant in El Dorado that affected the operating results for the second and third quarters of the year. (For additional information, see Note 22 – Business Interruption Claim and Gain of Involuntary Conversion of Assets.) 3 Payment of dividends is the means by which Deltic Timber Corporation makes distributions to its shareholders of profits and cash flows generated by the Company’s business operations. These dividends are declared by the Company’s Board of Directors on a quarterly basis. The Company’s dividend strategy is to grow the amount of the dividend over time, at a rate of increase that is believed to be sustainable. The timing and amount of future increases are based on the estimated trend for future earnings and cash flows, taking into account other potential uses of the Company’s capital resources including, but not limited to, acquisition opportunities, capital expenditures for existing operations, debt repayments, and repurchases of the Company’s common stock.

Significant Accounting Polici53

Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)a	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Apr. 01, 2013	Dec. 31, 2012
Significant Accounting Policies [Line Items]
Area of land own by company | a	530,000
Cash equivalents maturity period	Three months or less
Special charges bad debt expense	$ 133,000	$ 150,000	$ 158,000
Balance in allowance account	130,000	123,000
Charges to allowance for doubtful accounts	$ 133,000	188,000	137,000
Percentage of interest holds by company				100.00%	50.00%
Maximum completion period of acquisition of LKE properties	180 days
Proceeds from sales of land deposited with LKE intermediary	$ 1,000	0
Land lease term period	1 year
Deferred hunting lease revenue	$ 2,060,000	2,009,000
Deferred mineral lease revenue	446,000	1,140,000
Accrued property tax expenses	1,932,000	1,894,000
Advertising Costs	784,000	764,000	$ 716,000
Other noncurrent liabilities [Member]
Significant Accounting Policies [Line Items]
Deferred mineral lease revenue	115,000	383,000
Other current liabilities [Member]
Significant Accounting Policies [Line Items]
Deferred mineral lease revenue	$ 331,000	$ 757,000
Roads constructed and other land improvements [Member]
Significant Accounting Policies [Line Items]
Estimated useful life	10 years

Inventories - Inventories (Deta

Inventories - Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Inventories
Supplies	$ 1,638	$ 1,355
Inventory	11,917	11,494
Logs [Member]
Inventories
Raw materials	1,975	772
Del-Tin - wood fiber [Member]
Inventories
Raw materials	615	384
Lumber [Member]
Inventories
Finished goods	4,142	4,168
Medium density fiberboard [Member]
Inventories
Finished goods	2,516	3,889
Finished goods - consigned	$ 1,031	$ 926

Prepaid Expenses and Other Cu55

Prepaid Expenses and Other Current Assets - Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Prepaid Expense and Other Assets, Current [Abstract]
Short-term deferred tax assets	$ 2,131	$ 2,087
Refundable income taxes	3,062	2,537
Prepaid expenses	687	654
Other current assets	512	619
Prepaid expenses and other current assets	$ 6,392	$ 5,897

Business Combinations - Additio

Business Combinations - Additional Information (Detail) $ in Thousands	Apr. 01, 2013USD ($)ft²	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Jun. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Sep. 30, 2013USD ($)	Jun. 30, 2013USD ($)	Mar. 31, 2013USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Business Acquisition [Line Items]
Cash payment														$ 0	$ 0	$ 5,170
Gain on previously held equity interest												$ 3,165		0	0	3,165
Gain on bargain purchase										$ 128		3,285		0	0	3,413
Net sales		$ 49,641	$ 50,150	$ 45,681	$ 48,379	$ 55,070	$ 58,301	$ 58,605	$ 55,379	$ 48,372	$ 56,520	$ 53,247	$ 41,563	$ 193,851	$ 227,355	199,702
Del-Tin Fiber [Member]
Business Acquisition [Line Items]
Percentage membership interest of Del-Tin Fiber LLC	50.00%
Effective date of Acquisition	Apr. 1, 2013
Total consideration	$ 20,000
Cash payment	$ 5,170															5,170
Annual production capacity | ft²	150,000,000
Percentage of company owning	100.00%
Long-term liabilities	$ 29,000
Outstanding industrial bonds due	2,027
Gain on previously held equity interest																3,165
Fair value of previously held investment in Del-Tin Fiber	$ 10,786															10,786
Business combination on over carrying value													$ 7,621
Business acquisition on company owned equity method investment	50.00%
Weight average cost of capital	15.00%
Gain on bargain purchase	$ 3,413															3,413
Net sales																47,812
Net income																$ 3,068

Business Combinations - Purchas

Business Combinations - Purchase Price Allocated to Net Tangible and Intangible Assets (Detail) - USD ($) $ in Thousands	Apr. 01, 2013	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Cash paid				$ 0	$ 0	$ (5,170)
Gain on bargain purchase		$ 128	$ 3,285	$ 0	$ 0	3,413
Del-Tin Fiber [Member]
Business Acquisition [Line Items]
Accounts receivable	$ 4,229
Inventories	4,805
Other current assets	360
Property, plant, and equipment	40,960
Intangible assets	1,700
Other assets	171
Current liabilities	(1,653)
Deferred tax liabilities	(2,203)
Long-term liabilities	(29,000)
Net assets acquired	19,369
Cash paid	(5,170)					(5,170)
Fair value of previously held investment in Del-Tin Fiber	(10,786)					(10,786)
Gain on bargain purchase	$ 3,413					$ 3,413
Del-Tin Fiber [Member] | Internally developed software [Member]
Business Acquisition [Line Items]
Acquired intangible assets useful life	3 years

Business Combinations - Summari

Business Combinations - Summarizes Combined Result of Operations on Pro Forma Basis (Detail) - Del-Tin Fiber [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2013USD ($)$ / shares
Business Acquisition [Line Items]
Net sales | $	$ 217,268
Net income | $	$ 21,193
Basic earnings per common share | $ / shares	$ 1.69
Diluted earnings per common share | $ / shares	$ 1.68

Timber and Timberlands - Summar

Timber and Timberlands - Summary of Timber and Timberlands (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Purchased stumpage inventory	$ 2,437	$ 1,620
Timberlands	155,997	155,704
Fee timber	326,327	322,714
Logging facilities	1,221	2,720
Gross	485,982	482,758
Less accumulated cost of fee timber harvested and facilities depreciation	(124,292)	(118,670)
Timber and timberlands - net	361,856	364,410
Strategic timber and timberlands [Member]
Property, Plant and Equipment [Line Items]
Timber and timberlands - net	361,690	364,088
Non-strategic timber and timberlands [Member]
Property, Plant and Equipment [Line Items]
Timber and timberlands - net	$ 166	$ 322

Timber and Timberlands - Additi

Timber and Timberlands - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)a	Dec. 31, 2014USD ($)a	Dec. 30, 2014USD ($)	Dec. 31, 2013USD ($)a
Property, Plant and Equipment [Line Items]
Timberlands acquired | a	514	72,170		7,004
Cash payments for timberland acquisition expenditures	$ 824,000	$ 118,203,000		$ 8,919,000
Acres of timber land available for sale | a	250	655
Gains on sales of timberland	$ 656,000		$ 857,000	1,715,000
Gain recognized on transfer	25,000		$ 0	0
Cost of fee timber harvested	7,110,000	$ 5,544,000		4,494,000
Logging facilities depreciation	$ 98,000	$ 91,000		$ 92,000
Cash Portion [Member]
Property, Plant and Equipment [Line Items]
Timberlands acquired | a	474
Non Monetary [Member]
Property, Plant and Equipment [Line Items]
Timberlands acquired | a	40

Property, Plant, and Equipmen61

Property, Plant, and Equipment - Property, Plant, and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 193,641	$ 184,431
Less accumulated depreciation	(108,146)	(110,267)
Property, plant, and equipment, net	85,495	74,164
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	947	947
Land improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 10,409	8,163
Land improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	10 years
Land improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	20 years
Buildings and structures [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 23,900	22,680
Buildings and structures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	10 years
Buildings and structures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	20 years
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 158,385	$ 152,641
Machinery and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	3 years
Machinery and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	15 years

Property, Plant, and Equipmen62

Property, Plant, and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Depreciation of property, plant, and equipment charged to operations	$ 13,888	$ 12,707	$ 10,544
Gains/(losses) on disposals or retirements of assets included in operating income	308	$ (1,071)	$ 362
Acquisition of office building from related party	$ 1,547

Deferred Revenues and Other A63

Deferred Revenues and Other Accrued Liabilities - Deferred Revenues and Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Revenue Disclosure [Abstract]
Deferred revenues - current	$ 2,877	$ 3,310
Vacation accrual	1,360	1,312
Deferred compensation	619	1,166
All other current liabilities	2,751	1,435
Deferred revenues and other accrued liabilities	$ 7,607	$ 7,223

Other Noncurrent Liabilities -

Other Noncurrent Liabilities - Other Noncurrent Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Accumulated postretirement benefit obligation	$ 12,295	$ 12,343
Excess retirement plan	12,764	9,372
Accrued pension liability	15,698	14,955
Deferred revenue - long-term portion	115	383
All other noncurrent payables	1,487	2,287
Other noncurrent liabilities, net	$ 42,359	$ 39,340

Change in Accounting Principl65

Change in Accounting Principle - Summary of Adjustments (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Prepaid expenses and other current assets	$ 6,392	$ 5,897
Deferred charges and other assets	2,665	3,180
Current maturities, debt	39,917	0
Long-term debt	183,836	202,863
Scenario, Previously Reported [Member] | Accounting Standards Update 2015 - 03 [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Prepaid expenses and other current assets	6,475	5,964
Deferred charges and other assets	2,829	3,250
Current maturities, debt	40,000
Long-term debt	184,000	203,000
Restatement Adjustment [Member] | Adjustments for New Accounting Principle, Early Adoption [Member] | Accounting Standards Update 2015 - 03 [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Prepaid expenses and other current assets	(83)	(67)
Deferred charges and other assets	(164)	(70)
Current maturities, debt	(83)
Long-term debt	$ (164)	$ (137)

Credit Facilities - Additional

Credit Facilities - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Bancorp South [Member]
Credit Facilities [Line Items]
Outstanding borrowings	$ 491,000	$ 620,000
Bancorp South [Member] | Short-term Credit Facility [Member]
Credit Facilities [Line Items]
Outstanding borrowings	0	0
Amount available in excess of all borrowings outstanding	$ 1,000,000	1,000,000
Interest on borrowings	Based upon the New York Prime rate
Amount available on short term credit facility	$ 1,000,000
Credit facility expiry date	Dec. 31, 2016
Credit Agreement [Member] | Term Loan Credit Agreement, 4.05%, Due 2025 [Member]
Credit Facilities [Line Items]
Debt instrument amount	$ 100,000,000
Revolving Credit Facility [Member] | Sun Trust Bank [Member]
Credit Facilities [Line Items]
Amount available on credit facility	430,000,000
Option to increase in the amount of aggregate revolving commitments	$ 50,000,000
Options to request two extensions of facility maturity date, period	12 months
Outstanding borrowings	$ 55,000,000	134,000,000
Amount available in excess of all borrowings outstanding	$ 375,000,000	$ 296,000,000
Interest on borrowings	Base rate or an adjusted Eurodollar rate plus an applicable margin
Maximum leverage ratio	65.00%
Revolving Credit Facility [Member] | Sun Trust Bank [Member] | Minimum [Member]
Credit Facilities [Line Items]
Timber market value	175.00%
Commitment fee payable per annum	20.00%
Revolving Credit Facility [Member] | Sun Trust Bank [Member] | Maximum [Member]
Credit Facilities [Line Items]
Commitment fee payable per annum	35.00%

Indebtedness - Company's Indebt

Indebtedness - Company's Indebtedness (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt, including current maturities	$ 224,000	$ 203,000
Less unamortized debt issuance costs	(247)	(137)
Total debt, net	223,753	202,863
Total debt, net	223,753	202,863
Less current maturities	(39,917)	0
Long-term debt	183,836	202,863
Notes Payable, 2.01%*, Due 2019 [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt, including current maturities	55,000	134,000
Senior Notes Payable, 6.10%, Due 2016 [Member]
Debt Instrument [Line Items]
Long-term debt, including current maturities	40,000	40,000
Term Loan Credit Agreement, 4.05%, Due 2025 [Member]
Debt Instrument [Line Items]
Long-term debt, including current maturities	100,000
Union County, Arkansas Taxable Industrial Revenue Bonds, .23%*, Due 2027 [Member]
Debt Instrument [Line Items]
Long-term debt, including current maturities	$ 29,000	$ 29,000

Indebtedness - Company's Inde68

Indebtedness - Company's Indebtedness (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Notes Payable, 2.01%*, Due 2019 [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument maturity year	Dec. 31, 2019
Weighted average interest rate	2.01%	1.67%
Senior Notes Payable, 6.10%, Due 2016 [Member]
Debt Instrument [Line Items]
Debt instrument maturity year	Dec. 18, 2016
Weighted average interest rate	6.10%
Term Loan Credit Agreement, 4.05%, Due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument maturity year	Dec. 31, 2025
Weighted average interest rate	4.05%
Union County, Arkansas Taxable Industrial Revenue Bonds, .23%*, Due 2027 [Member]
Debt Instrument [Line Items]
Debt instrument maturity year	Dec. 31, 2027
Weighted average interest rate	0.23%	0.29%

Indebtedness - Additional Infor

Indebtedness - Additional Information (Detail) - USD ($)	Sep. 01, 2004	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 1998
Debt Instrument [Line Items]
Private placement long term debt outstanding		$ 224,000,000	$ 203,000,000
Percentage of Timber market value		175.00%
Scheduled maturities of long-term debt, the next 12 months		$ 40,000,000
Scheduled maturities of long-term debt, year two		0
Scheduled maturities of long-term debt, year three		0
Scheduled maturities of long-term debt, year four		55,000,000
Scheduled maturities of long-term debt, year five		0
Senior Notes Payable, 6.10%, Due 2016 [Member]
Debt Instrument [Line Items]
Private placement long term debt outstanding		$ 40,000,000	40,000,000
Weighted average interest rate		6.10%
Maximum funded debt		0.65
Changes to financial covenants by leverage ratio		0.65
Debt instrument maturity year		Dec. 18, 2016
Senior Notes Payable, 6.10%, Due 2016 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Percentage of Timber market value		175.00%
Term Loan Credit Agreement, 4.05%, Due 2025 [Member]
Debt Instrument [Line Items]
Private placement long term debt outstanding		$ 100,000,000
Weighted average interest rate		4.05%
Debt instrument maturity year		Dec. 31, 2025
Term Loan Credit Agreement, 4.05%, Due 2025 [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Weighted average interest rate		4.05%
Debt instrument amount		$ 100,000,000
Debt instrument term		10 years
Debt instrument effective date		Aug. 27, 2015
Debt instrument maturity year		Aug. 27, 2025
Union County, Arkansas Taxable Industrial Revenue Bonds, .23%*, Due 2027 [Member]
Debt Instrument [Line Items]
Private placement long term debt outstanding		$ 29,000,000	$ 29,000,000
Weighted average interest rate		0.23%	0.29%
Debt instrument maturity year		Dec. 31, 2027
Long-term liabilities		$ 29,000,000
Bonds issued to complete construction of plant					$ 60,000,000
Unpaid interest and principal due date		Oct. 1, 2027
Retirement of bonds	$ 31,000,000
Fees associated with letter of credit		$ 488,000	$ 475,000
Average interest rate on bonds		0.28%	0.29%	0.38%

Indebtedness - Ratio Requiremen

Indebtedness - Ratio Requirements for Revolving Credit Facility, Senior Notes Payable and Term Loan Credit Agreement (Detail)	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Debt Covenants [Line Items]
Total outstanding debt as a percentage of total debt allowed based on the minimum timber market value covenant	74.01%	74.94%
Covenants Requirements [Member]
Schedule Of Debt Covenants [Line Items]
Leverage ratio should be less than	0.650
Actual Ratio [Member]
Schedule Of Debt Covenants [Line Items]
Leverage ratio should be less than	0.469	0.432

Indebtedness - Ratio Requirem71

Indebtedness - Ratio Requirements for Revolving Credit Facility, Senior Notes Payable and Term Loan Credit Agreement (Parenthetical) (Detail)	Dec. 31, 2015
Debt Disclosure [Abstract]
Percentage of Timber market value	175.00%

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Tax Expense/(Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Federal
Current	$ 1,508	$ 9,959	$ 10,237
Deferred	(590)	(961)	138
Total federal income tax expense (benefit)	918	8,998	10,375
State
Current	510	887	2,154
Deferred	(328)	(292)	103
Total state and local income tax expense (benefit)	182	595	2,257
Income tax provision as reported	$ 1,100	$ 9,593	$ 12,632

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Benefit [Line Items]
Company's income tax expense at the statutory U.S. federal rate	35.00%	35.00%	35.00%
Rate difference on timber gains	$ (192,000)
Unrecognized tax benefits	$ 0	$ 0	$ 1,185,000
Tax Year 2016 [Member]
Income Tax Benefit [Line Items]
Effective income tax rate on timber gains	23.80%
Minimum [Member]
Income Tax Benefit [Line Items]
Timber gain held by the company in years	15 years

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
U.S. federal income tax using statutory tax rate	$ 1,260	$ 10,239	$ 13,588
State tax, net of federal tax benefit	121	1,130	1,458
Permanent differences	(89)	(1,000)	(1,219)
Tax effects resulting from:
Rate difference on timber gains	(192)
Gain on bargain purchase			(1,195)
Reversal of uncertain state income tax position	0	(776)	0
Income tax provision as reported	$ 1,100	$ 9,593	$ 12,632

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets
Investment in real estate held for development and sale	$ 17,564	$ 17,286
Postretirement and other employee benefits	21,725	20,086
Other deferred tax assets	1,861	2,093
Total deferred tax assets	41,150	39,465
Deferred tax liabilities
Timber and timberlands	(27,950)	(27,191)
Property, plant, and equipment	(11,370)	(11,021)
Other deferred tax liabilities	(224)	(268)
Total deferred tax liabilities	(39,544)	(38,480)
Net deferred tax assets/(liabilities)	$ 1,606	$ 985

Income Taxes - Schedule of De76

Income Taxes - Schedule of Deferred Tax Assets and Liabilities Classified in Accompanying Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current tax assets	$ 2,131	$ 2,087
Long-term tax liabilities	(525)	(1,102)
Net deferred tax assets/(liabilities)	$ 1,606	$ 985

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail)	12 Months Ended
	Dec. 31, 2014USD ($)
Income Tax Disclosure [Abstract]
Balance at January 1	$ 1,185,000
Lapse of statute	(1,185,000)
Balance at December 31	$ 0

Stockholders Rights Plan - Addi

Stockholders Rights Plan - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015$ / shares
Stockholders Rights Plan Textual [Abstract]
Stockholders right plan amended and increase the exercise price	$ 200
Person becoming beneficial owner	15.00%

Fair Value of Financial Instr79

Fair Value of Financial Instruments - Fair Value Measurements for Financial Liabilities Accounted on a Recurring Basis (Detail) $ in Thousands	Dec. 31, 2015USD ($)
Liabilities
Nonqualified employee savings plan	$ 1,488
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member]
Liabilities
Nonqualified employee savings plan	$ 1,488

Fair Value of Financial Instr80

Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financial liabilities
Long-term debt, including current maturities, Carrying Amount	$ 223,753	$ 202,863
Long-term debt, including current maturities, Estimated Fair Value	$ 225,123	$ 207,077

Concentration of Credit Risks -

Concentration of Credit Risks - Additional Information (Detail) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Accounts receivables	$ 844,000	$ 0

Other Comprehensive Income Di82

Other Comprehensive Income Disclosures - Changes in Accumulated Other Comprehensive Loss by Component (Net of Tax) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance, January 1	$ (11,411)
Net (gain) loss arising during period	(1,084)	$ (8,895)	$ 10,973
Ending Balance, December 31	(11,594)	(11,411)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance, January 1	(11,411)	(2,679)	(14,103)
Amounts reclassified from AOCL	901	163	451
Net (gain) loss arising during period	(1,084)	(8,895)	10,973
Net current period other comprehensive (income) loss	(183)	(8,732)	11,424
Ending Balance, December 31	(11,594)	(11,411)	(2,679)
Accumulated Defined Benefit Plans Adjustment [Member] | Defined Benefit Funded Retirement Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance, January 1	(7,615)	(2,410)	(9,553)
Amounts reclassified from AOCL	512	111	529
Net (gain) loss arising during period	32	(5,316)	6,614
Net current period other comprehensive (income) loss	544	(5,205)	7,143
Ending Balance, December 31	(7,071)	(7,615)	(2,410)
Accumulated Defined Benefit Plans Adjustment [Member] | Defined Benefit Unfunded Retirement Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance, January 1	(3,064)	(482)	(3,380)
Amounts reclassified from AOCL	369	173	38
Net (gain) loss arising during period	(1,614)	(2,755)	2,860
Net current period other comprehensive (income) loss	(1,245)	(2,582)	2,898
Ending Balance, December 31	(4,309)	(3,064)	(482)
Accumulated Defined Benefit Plans Adjustment [Member] | Other Post-Retirement Benefit Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance, January 1	(732)	213	(1,170)
Amounts reclassified from AOCL	20	(121)	(116)
Net (gain) loss arising during period	498	(824)	1,499
Net current period other comprehensive (income) loss	518	(945)	1,383
Ending Balance, December 31	$ (214)	$ (732)	$ 213

Other Comprehensive Income Di83

Other Comprehensive Income Disclosures - Reclassification Out of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service costs	$ 4	$ 10	$ 7
Amortization of actuarial losses	1,525	457	934
Amortization of plan amendment	(46)	(199)	(199)
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service costs	4	10	7
Amortization of actuarial losses	1,525	457	934
Amortization of plan amendment	(46)	(199)	(199)
Total before tax	1,483	268	742
Income tax benefit/(expense)	(582)	(105)	(291)
Total reclassifications - net of tax	901	163	451
Accumulated Defined Benefit Plans Adjustment [Member] | Defined Benefit Funded Retirement Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service costs	4	17	18
Amortization of actuarial losses	839	165	852
Total before tax	843	182	870
Income tax benefit/(expense)	(331)	(71)	(341)
Total reclassifications - net of tax	512	111	529
Accumulated Defined Benefit Plans Adjustment [Member] | Defined Benefit Unfunded Retirement Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service costs	0	(7)	(11)
Amortization of actuarial losses	607	292	74
Total before tax	607	285	63
Income tax benefit/(expense)	(238)	(112)	(25)
Total reclassifications - net of tax	369	173	38
Accumulated Defined Benefit Plans Adjustment [Member] | Other Post-Retirement Benefit Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of actuarial losses	79	0	8
Amortization of plan amendment	(46)	(199)	(199)
Total before tax	33	(199)	(191)
Income tax benefit/(expense)	(13)	78	75
Total reclassifications - net of tax	$ 20	$ (121)	$ (116)

Other Comprehensive Income Di84

Other Comprehensive Income Disclosures - Tax Effects by Component (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Plan Amendments, Tax Effect [Abstract]
Gains/(losses) arising during the period, Before Tax Amount	$ (1,784)	$ (14,636)	$ 18,054
Amortization of prior service costs, Before Tax Amount	4	10	7
Amortization of actuarial losses, Before Tax Amount	1,525	457	934
Amortization of plan amendment, Before tax amount	(46)	(199)	(199)
Total, Before Tax Amount	(301)	(14,368)	18,796
Gains/(losses) arising during the period, Tax (expense) or benefit	700	5,741	(7,081)
Amortization of prior service costs, Tax (Expenses) or benefits	(2)	(4)	(3)
Amortization of actuarial losses, Tax (Expenses) or benefits	(598)	(179)	(366)
Amortization of plan amendment, Tax (Expenses) or benefits	18	78	78
Total, Tax (Expense) or Benefit	118	5,636	(7,372)
Gains/(losses) arising during the period, Net of Tax Amount	(1,084)	(8,895)	10,973
Amortization of prior service costs, Net of Tax Amount	2	6	4
Amortization of actuarial losses, Net of Tax Amount	927	278	568
Amortization of plan amendment, Net of Tax Amount	(28)	(121)	(121)
Total, Net of Tax Amount	$ (183)	$ (8,732)	$ 11,424

Employee and Retiree Benefit 85

Employee and Retiree Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee service hours	1000 hours
Employment commencement period	Both the 1,000 hours requirement and the employment requirement for each twelve-month period.
Service period of employee	12 months
Defined benefit obligations, outstanding	$ 250,000,000
Defined benefit plan assumptions	The discount rate assumption used by the Company to measure benefit obligations and net periodic expenses is based on a spot-rate yield curve using current market data for corporate bonds at the measurement date and is used to determine the present value of the expected future cash flows at the measurement date. Additionally, a single rate is determined so that the present value of the benefit obligations using the single rate equals the present value using the spot rate yield curve. The yield curve only includes bonds that meet the following criteria: (1) have maturities between 6 months and 30 years; (2) are noncallable, nonputable, and do not have a sinking fund provision; (3) have fixed coupon payments with a single payment at maturity; (4) have more than $250 million par outstanding; (5) are U.S. dollar-denominated bonds; and (6) have an average rating of AA- (S&P/Fitch) or Aa3 (Moody’s) and higher.
Percentage of expected long-term rate of return on pension plan	7.50%
Health care inflation cost assumed to increase at an annual rate	5.00%
A one percentage-point increase in the assumed health care cost trend rate increases the aggregate service and interest cost components	$ 222,000
A one percentage-point increase in the assumed health care cost trend rate and the benefit obligation	2,085,000
One percentage-point decrease in the assumed rate	172,000
One percentage-point decrease in the assumed rate and the benefit obligation	$ 1,652,000
Planed Asset Allocation Levels, Minimum	45.00%
Planed Asset Allocation Levels, Maximum	70.00%
Plan assets held in the securities	2.50%
Plan assets were invested in mortgage-backed securities	3.00%
Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit obligations maturity date	6 months
Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit obligations maturity date	30 years
Fixed Income Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Planed Asset Allocation Levels, Minimum	25.00%
Planed Asset Allocation Levels, Maximum	55.00%
Alternative Investment Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Planed Asset Allocation Levels, Minimum	0.00%
Planed Asset Allocation Levels, Maximum	15.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Planed Asset Allocation Levels, Minimum	0.00%
Planed Asset Allocation Levels, Maximum	5.00%
Large Cap Market [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Planed Asset Allocation Levels, Minimum	40.00%
Planed Asset Allocation Levels, Maximum	60.00%
Mid and Small Cap Equity [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Planed Asset Allocation Levels, Minimum	5.00%
Planed Asset Allocation Levels, Maximum	15.00%
International Equity [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Planed Asset Allocation Levels, Minimum	0.00%
Planed Asset Allocation Levels, Maximum	25.00%
Planed Asset Allocation Levels	40.00%
Thrift Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 935,000	$ 829,000	$ 792,000
Pension Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net loss for retirement pension plan	$ 1,468,000
Percentage of expected long-term rate of return on pension plan	7.50%	7.50%	7.50%
Other Post-Retirement Benefit Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions towards the defined benefit funded retirement plan	$ 380,000
Employer contributions	290,000	$ 328,000
Defined Benefit Funded Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected expense	2,393,000
Contributions towards the defined benefit funded retirement plan	600,000
Employer contributions	775,000	1,200,000
Defined Benefit Unfunded Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected expense	1,730,000
Contributions towards the defined benefit funded retirement plan	272,000
Employer contributions	$ 275,000	$ 255,000

Employee and Retiree Benefit 86

Employee and Retiree Benefit Plans - Plan Benefit Obligations, Fair Value of Plan Assets, and Funded Status (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in plan assets
Fair value of plan assets at beginning of period	$ 32,795
Fair value of plan assets at end of period	32,360	$ 32,795
Amounts recognized in the balance sheet
Noncurrent liability	(12,764)	(9,372)
Defined Benefit Funded Retirement Plan [Member]
Change in benefit obligation
Benefit obligation at beginning of period	47,750	37,010
Service cost	1,959	1,476	$ 1,549
Interest cost	2,021	1,839	1,557
Actuarial (gain)/loss	(2,406)	8,626
Benefits paid	(1,266)	(1,201)
Benefit obligation at end of period	48,058	47,750	37,010
Change in plan assets
Fair value of plan assets at beginning of period	32,795	30,627
Actual return on plan assets	240	2,327
Employer contributions	775	1,200
Benefits paid	(1,266)	(1,201)
Expenses	(184)	(158)
Fair value of plan assets at end of period	32,360	32,795	30,627
Funded status of plans	(15,698)	(14,955)
Amounts recognized in the balance sheet
Noncurrent liability	(15,698)	(14,955)
Deferred income taxes - net	6,157	5,866
Accumulated other comprehensive (income)/loss	7,071	7,615
Amounts recognized in accumulated other comprehensive loss
Net unrecognized (gain)/loss	11,633	12,525
Unrecognized prior service cost/(credit)	0	4
Tax effects	(4,562)	(4,914)
Amounts recognized in accumulated other comprehensive loss, Total	$ 7,071	$ 7,615
Assumptions used in measurement of benefit obligations
Weighted average discount rate	4.47%	4.21%
Rate of compensation increase	4.00%	4.00%
Accumulated benefit obligations at year end	$ 42,829	$ 40,720
Defined Benefit Unfunded Retirement Plan [Member]
Change in benefit obligation
Benefit obligation at beginning of period	9,644	4,690
Service cost	518	302	143
Interest cost	494	373	193
Actuarial (gain)/loss	2,655	4,534
Benefits paid	(275)	(255)
Benefit obligation at end of period	13,036	9,644	4,690
Change in plan assets
Employer contributions	275	255
Benefits paid	(275)	(255)
Funded status of plans	(13,036)	(9,644)
Amounts recognized in the balance sheet
Current liability	(272)	(272)
Noncurrent liability	(12,764)	(9,372)
Deferred income taxes - net	5,113	3,783
Accumulated other comprehensive (income)/loss	4,308	3,064
Amounts recognized in accumulated other comprehensive loss
Net unrecognized (gain)/loss	7,088	5,041
Tax effects	(2,780)	(1,977)
Amounts recognized in accumulated other comprehensive loss, Total	$ 4,308	$ 3,064
Assumptions used in measurement of benefit obligations
Weighted average discount rate	4.47%	4.21%
Rate of compensation increase	5.00%	4.00%
Accumulated benefit obligations at year end	$ 8,813	$ 6,792
Other Post-Retirement Benefit Plan [Member]
Change in benefit obligation
Benefit obligation at beginning of period	12,698	10,756
Service cost	527	418	450
Interest cost	559	497	431
Participant contributions	92	88
Actuarial (gain)/loss	(819)	1,355
Benefits paid	(382)	(416)
Benefit obligation at end of period	12,675	12,698	$ 10,756
Change in plan assets
Employer contributions	290	328
Participant contributions	92	88
Benefits paid	(382)	(416)
Funded status of plans	(12,675)	(12,698)
Amounts recognized in the balance sheet
Current liability	(380)	(355)
Noncurrent liability	(12,295)	(12,343)
Deferred income taxes - net	4,647	4,981
Accumulated other comprehensive (income)/loss	215	732
Amounts recognized in accumulated other comprehensive loss
Net unrecognized (gain)/loss	334	1,231
Unrecognized prior service cost/(credit)	0	(46)
Tax effects	(119)	(453)
Amounts recognized in accumulated other comprehensive loss, Total	$ 215	$ 732
Assumptions used in measurement of benefit obligations
Weighted average discount rate	4.50%	4.25%

Employee and Retiree Benefit 87

Employee and Retiree Benefit Plans - Retirement Expense and Other Postretirement Benefits Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Funded Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,959	$ 1,476	$ 1,549
Interest cost	2,021	1,839	1,557
Expected return on plan assets	(2,410)	(2,290)	(1,894)
Amortization of prior service cost (credit)	4	17	18
Amortization of actuarial loss	839	165	852
Net periodic benefit cost	2,413	1,207	2,082
Defined Benefit Unfunded Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	518	302	143
Interest cost	494	373	193
Amortization of prior service cost (credit)	0	(7)	(11)
Amortization of actuarial loss	607	292	74
Net periodic benefit cost	1,619	960	399
Other Post-Retirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	527	418	450
Interest cost	559	497	431
Amortization of prior service cost (credit)	(46)	(199)	(199)
Amortization of actuarial loss	79	0	8
Net periodic benefit cost	$ 1,119	$ 716	$ 690

Employee and Retiree Benefit 88

Employee and Retiree Benefit Plans - Assumptions Used to Determine Net Periodic Benefit Cost - Pension Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets	7.50%
Other changes in plan assets and benefit obligations recognized in other comprehensive (income)/loss
Net unrecognized loss/(gain)	$ 1,784	$ 14,636	$ (18,054)
Amortization of prior service credit	(4)	(10)	(7)
Amortization of actuarial losses	(1,525)	(457)	(934)
Amortization of plan amendment	46	199	199
Tax effect of changes	(118)	(5,636)	7,372
Total recognized in other comprehensive (income)/loss	$ 183	$ 8,732	$ (11,424)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate	4.21%	4.84%	3.94%
Expected long-term rate of return on plan assets	7.50%	7.50%	7.50%
Rate of compensation increase	4.00%	4.00%	4.00%
Other Post-Retirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate	4.25%	4.85%	3.90%

Employee and Retiree Benefit 89

Employee and Retiree Benefit Plans - Estimated Benefit Payments by Year (Detail) $ in Thousands	Dec. 31, 2015USD ($)
Defined Benefit Funded Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2,016	$ 1,434
2,017	1,563
2,018	1,722
2,019	1,883
2,020	2,099
2021 - 2025	13,355
Defined Benefit Unfunded Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2,016	272
2,017	269
2,018	266
2,019	263
2,020	259
2021 - 2025	4,655
Other Post-Retirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2,016	380
2,017	426
2,018	465
2,019	516
2,020	553
2021 - 2025	$ 3,225

Employee and Retiree Benefit 90

Employee and Retiree Benefit Plans - Fair Value Investments Plan (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	100.00%	100.00%
Total plan investments at fair value	$ 32,360	$ 32,795
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	2.30%	4.50%
Total plan investments at fair value	$ 738	$ 1,470
Other Plan Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	0.10%	0.10%
Total plan investments at fair value	$ 46	$ 40
Us Govt and Agency Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	15.70%	15.20%
Total plan investments at fair value	$ 5,093	$ 5,001
Corporate Debt Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	9.70%	7.20%
Total plan investments at fair value	$ 3,144	$ 2,370
Municipal Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	0.30%
Total plan investments at fair value	$ 95
Mutual Funds Dividend and Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	34.20%	28.40%
Total plan investments at fair value	$ 11,057	$ 9,327
Mutual Funds International and Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	5.40%	5.60%
Total plan investments at fair value	$ 1,739	$ 1,835
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	2.30%	2.30%
Total plan investments at fair value	$ 733	$ 742
Exchange Traded Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	22.10%	15.00%
Total plan investments at fair value	$ 7,148	$ 4,913
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	7.90%	6.70%
Total plan investments at fair value	$ 2,567	$ 2,189
Equity Securities Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy		0.30%
Total plan investments at fair value		$ 105
Equity Securities Materials and Industrials [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy		2.00%
Total plan investments at fair value		$ 652
Equity Securities Consumer [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy		3.90%
Total plan investments at fair value		$ 1,274
Equity Securities Healthcare [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy		2.60%
Total plan investments at fair value		$ 854
Equity Securities Financials [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy		0.60%
Total plan investments at fair value		$ 201
Equity Securities Information Tech [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy		4.60%
Total plan investments at fair value		$ 1,503
Equity Securities Foreign Stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy		1.00%
Total plan investments at fair value		$ 319
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	75.30%	80.60%
Total plan investments at fair value	$ 24,362	$ 26,443
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	738	1,470
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Other Plan Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	46	40
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Us Govt and Agency Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	2,901	3,208
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Mutual Funds Dividend and Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	11,057	9,327
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Mutual Funds International and Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	1,739	1,835
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	733	742
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Exchange Traded Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	$ 7,148	4,913
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Equity Securities Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value		105
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Equity Securities Materials and Industrials [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value		652
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Equity Securities Consumer [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value		1,274
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Equity Securities Healthcare [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value		854
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Equity Securities Financials [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value		201
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Equity Securities Information Tech [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value		1,503
Quoted Prices in Active Markets for Identical Liabilities Inputs Level 1 [Member] | Equity Securities Foreign Stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value		$ 319
Significant Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	16.80%	12.70%
Total plan investments at fair value	$ 5,431	$ 4,163
Significant Observable Inputs Level 2 [Member] | Us Govt and Agency Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	2,192	1,793
Significant Observable Inputs Level 2 [Member] | Corporate Debt Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	3,144	$ 2,370
Significant Observable Inputs Level 2 [Member] | Municipal Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	$ 95
Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent of fair value hierarchy	7.90%	6.70%
Total plan investments at fair value	$ 2,567	$ 2,189
Significant Unobservable Inputs Level 3 [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan investments at fair value	$ 2,567	$ 2,189

Employee and Retiree Benefit 91

Employee and Retiree Benefit Plans - Activity in Level 3 Investments (Detail) - Significant Unobservable Inputs Level 3 [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 2,189	$ 2,077
Actual return on plan assets:
Relating to assets still held at the reporting date	(122)	112
Purchases, sales, and settlements	500
Ending balance	$ 2,567	$ 2,189

Incentive Plans - Additional In

Incentive Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum number of shares awarded as restricted stock	75,000
Options and stock appreciation rights in calendar year	50,000
Stock Based Compensation Expense	$ 3,324	$ 3,238	$ 2,797
Income tax benefit	$ 36	160	409
Options granted period	10 years
Option vested	One-fourth
Subsequent period of options granted	4 years
Option Price Upper limit	$ 34.41
Option Price lower limit	$ 71.35
Intrinsic value of options exercised	$ 430	124	513
Vesting period of restricted stock units	4 years
2002 Stock Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for issuance under the 2002 plan	1,800,000
Number of shares available for award under 2002 plan	796,413
Cash Incentive Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expenses towards cash incentive awards	$ 16	586	$ 2,549
Accrued provisions for cash incentive awards	50	$ 400
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested stock	$ 909
Cost not yet recognized over a weighted-average period	1 year 6 months
Nonvested Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested stock	$ 2,380
Cost not yet recognized over a weighted-average period	1 year 7 months 6 days
Nonvested Restricted Stock Performance Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested stock	$ 2,316
Cost not yet recognized over a weighted-average period	1 year 9 months 18 days
Other Stock Based Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Other stock-based awards	0

Incentive Plans - Valuation of

Incentive Plans - Valuation of Stock Options and Restricted Stock Performance Units (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected term of options (in years)	6 years 3 months 7 days	6 years 3 months 7 days	6 years 3 months 7 days
Weighted expected volatility	38.64%	37.38%	37.78%
Dividend yield	0.56%	0.55%	0.58%
Risk-free interest rate - performance restricted shares	1.15%	1.23%	0.60%
Risk-free interest rate - stock options	1.92%	2.99%	1.98%
Stock price as of valuation date	$ 65.89	$ 63.21	$ 71.35
Restricted performance share valuation	77.52	80.56	87.74
Grant date fair value - stock options	$ 24.40	$ 21.87	$ 26.20

Incentive Plans - Summary of St

Incentive Plans - Summary of Stock Options (Detail) - Stock Options [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding Shares, beginning balance | shares	151,753
Shares, Granted | shares	22,494
Shares, Exercised | shares	(24,897)
Shares, Forfeited/expired | shares	(1,480)
Outstanding Shares, ending balance | shares	147,870
Shares, Exercisable | shares	87,795
Outstanding Weighted Average Exercise Price, beginning | $ / shares	$ 60.99
Weighted Average Exercise Price, Granted | $ / shares	65.89
Weighted Average Exercise Price, Exercised | $ / shares	48.11
Weighted Average Exercise Price, Forfeited/expired | $ / shares	65.51
Outstanding Weighted Average Exercise Price, ending | $ / shares	63.86
Outstanding Weighted Average Exercise Price, Exercisable | $ / shares	$ 62.17
Outstanding Weighted Average Remaining Contractual Term (Years), Ending	6 years 2 months 12 days
Weighted Average Remaining Contractual Term, Exercisable	4 years 10 months 24 days
Outstanding Aggregate Intrinsic Value, Ending | $	$ 182
Aggregate Intrinsic Values, Exercisable | $	$ 182

Incentive Plans - Summary of 95

Incentive Plans - Summary of Stock Options Outstanding (Detail)	12 Months Ended
	Dec. 31, 2015$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Lower Limit	$ 71.35
Range of Exercise Prices Upper Limit	$ 34.41
Number of Options, Options Outstanding | shares	147,870
Number of Options, Options Exercisable | shares	87,795
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Lower Limit	$ 31
Range of Exercise Prices Upper Limit	$ 35
Number of Options, Options Outstanding | shares	658
Average Life in Years, Options Outstanding	3 years 1 month 6 days
Average Exercise Price, Options Outstanding	$ 34.41
Number of Options, Options Exercisable | shares	658
Average Exercise Price, Options Exercisable	$ 34.41
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Lower Limit	41
Range of Exercise Prices Upper Limit	$ 45
Number of Options, Options Outstanding | shares	2,774
Average Life in Years, Options Outstanding	4 years 1 month 6 days
Average Exercise Price, Options Outstanding	$ 44.84
Number of Options, Options Exercisable | shares	2,774
Average Exercise Price, Options Exercisable	$ 44.84
Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Lower Limit	51
Range of Exercise Prices Upper Limit	$ 55
Number of Options, Options Outstanding | shares	20,230
Average Life in Years, Options Outstanding	1 year 3 months 18 days
Average Exercise Price, Options Outstanding	$ 52.59
Number of Options, Options Exercisable | shares	20,230
Average Exercise Price, Options Exercisable	$ 52.59
Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Lower Limit	56
Range of Exercise Prices Upper Limit	$ 65
Number of Options, Options Outstanding | shares	51,995
Average Life in Years, Options Outstanding	6 years 7 months 6 days
Average Exercise Price, Options Outstanding	$ 63.38
Number of Options, Options Exercisable | shares	32,664
Average Exercise Price, Options Exercisable	$ 63.47
Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Lower Limit	66
Range of Exercise Prices Upper Limit	$ 75
Number of Options, Options Outstanding | shares	72,213
Average Life in Years, Options Outstanding	7 years 4 months 24 days
Average Exercise Price, Options Outstanding	$ 68.36
Number of Options, Options Exercisable | shares	31,469
Average Exercise Price, Options Exercisable	$ 69.09

Incentive Plans - Summary of No

Incentive Plans - Summary of Nonvested Restricted Stock (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value Nonvested, Granted	$ 77.52	$ 80.56	$ 87.74
Nonvested Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Nonvested, Beginning Balance	85,410
Shares Nonvested, Granted	21,005
Shares Nonvested, Vested	(18,682)
Shares Nonvested, Forfeited	(628)
Shares Nonvested, Ending Balance	87,105	85,410
Weighted Average Grant-Date Fair Value Nonvested, Beginning Balance	$ 66.51
Weighted Average Grant-Date Fair Value Nonvested, Granted	66.06
Weighted Average Grant-Date Fair Value Nonvested, Vested	63.54
Weighted Average Grant-Date Fair Value Nonvested, Forfeited	67
Weighted Average Grant-Date Fair Value Nonvested, Ending Balance	$ 67.04	$ 66.51

Incentive Plans - Summary of 97

Incentive Plans - Summary of Nonvested Restricted Stock Performance Units (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value Nonvested, Granted	$ 77.52	$ 80.56	$ 87.74
Nonvested Restricted Stock Performance Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Nonvested, Beginning Balance	56,586
Shares Nonvested, Granted	20,297
Shares Nonvested, Units not meeting vesting conditions	(12,135)
Shares Nonvested, Forfeited	(848)
Shares Nonvested, Ending Balance	63,900	56,586
Weighted Average Grant-Date Fair Value Nonvested, Beginning Balance	$ 85.78
Weighted Average Grant-Date Fair Value Nonvested, Granted	77.52
Weighted Average Grant-Date Fair Value Nonvested, Units not meeting vesting conditions	85.56
Weighted Average Grant-Date Fair Value Nonvested, Forfeited	83.06
Weighted Average Grant-Date Fair Value Nonvested, Ending Balance	$ 83.24	$ 85.78

Supplemental Cash Flow Disclosu

Supplemental Cash Flow Disclosures - Interest and Income Taxes Information Concerning Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]
Income taxes paid in cash	$ 2,517	$ 14,976	$ 11,042
Interest paid	5,679	5,420	3,954
Interest capitalized	$ (103)	$ (70)	$ (53)

Supplemental Cash Flow Disclo99

Supplemental Cash Flow Disclosures - Non-cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Issuance of restricted stock	$ 1,677	$ 1,290	$ 935
Capital expenditures accrued, not paid	1,603	738	1,271
Timberland exchanges	$ 39	$ 0	0
Fair value of Del-Tin Fiber net assets acquired			$ 19,369

Supplemental Cash Flow Discl100

Supplemental Cash Flow Disclosures - (Increases)/Decreases in Operating Working Capital Other Than Cash and Cash Equivalents (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract]
Trade accounts receivable	$ 2,091	$ (1,756)	$ 2,178
Other receivables	(11)	8	(6)
Inventories	(423)	945	(2,740)
Prepaid expenses and other current assets	(441)	(2,543)	(184)
Trade accounts payable	420	(2,123)	3,701
Accrued taxes other than income taxes	(31)	(61)	216
Deferred revenues and other accrued liabilities	1,302	(3,644)	2,718
Other Current Assets and Liabilities, Net	$ 2,907	$ (9,174)	$ 5,883

Supplemental Cash Flows Disc101

Supplemental Cash Flows Disclosures - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Cash Flows [Abstract]
Deferred long-term mineral lease	$ 267	$ 266	$ 1,635
Total cash payment received from deferred mineral lease rental	$ 81	$ 711	$ 30

Earnings per Share - Computatio

Earnings per Share - Computation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net earnings allocated to common stock													$ 2,623	$ 19,445	$ 25,924
Net earnings allocated to participating securities													31	217	268
Net income allocated to common stock and participating securities	$ (128)	$ 38	$ 831	$ 1,913	$ 3,479	$ 5,974	$ 5,298	$ 4,911	$ 2,337	$ 5,813	$ 11,268	$ 6,774	$ 2,654	$ 19,662	$ 26,192
Weighted average number of common shares used in basic EPS													12,407	12,497	12,566
Effect of dilutive stock awards													60	56	58
Weighted average number of common shares and dilutive potential common stock used in EPS assuming dilution													12,467	12,553	12,624
Earnings per common share
Basic	$ (0.01)	$ 0	$ 0.07	$ 0.15	$ 0.28	$ 0.47	$ 0.42	$ 0.39	$ 0.18	$ 0.46	$ 0.89	$ 0.53	$ 0.21	$ 1.56	$ 2.06
Assuming dilution	$ (0.01)	$ 0	$ 0.07	$ 0.15	$ 0.28	$ 0.47	$ 0.42	$ 0.39	$ 0.18	$ 0.46	$ 0.88	$ 0.53	$ 0.21	$ 1.55	$ 2.05

Earnings per Share - Informatio

Earnings per Share - Information about Potentially Dilutive Securities Outstanding (Detail) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares outstanding not included in the computation of diluted earnings per share	72,213	76,968	50,197
Restricted Performance Shares [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares outstanding not included in the computation of diluted earnings per share	63,900	56,586	52,625

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Thousands	Dec. 31, 2015USD ($)
Timberland Acquisitions [Member]
Contingencies And Commitments [Line Items]
Commitments for capital expenditures	$ 317
Capital Addition Purchase Commitments [Member]
Contingencies And Commitments [Line Items]
Commitments for capital expenditures	30,632
Investment in Real Estate [Member]
Contingencies And Commitments [Line Items]
Commitments for capital expenditures	$ 4,504

Business Interruption Claim 105

Business Interruption Claim and Gain on Involuntary Conversion of Assets - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Interruption Loss [Line Items]
Business interruption insurance settled	$ 2,452,000
Other income - business interruption claim				$ 516,000	$ 0	$ 0
Expense recognized for fire policy deductibles			$ 948,000
Claims for property damages	5,969,000
Expenses deductible for property policy		$ 1,000,000
Claims for repair, inventory and expenses in property insurance settlement				4,379,000
Equipment claim in property insurance settlement				1,590,000
Recovery of costs, write off		$ 886,000
Gain on involuntary conversion of assets				$ 704,000	$ 0	881,000
Business interruption losses, nature of event				On March 10, 2015, the Company experienced a fire at its MDF plant located in El Dorado, Arkansas. In December of 2012, four lumber storage sheds at the Company’s Ola Mill were destroyed due to an accumulation of snow and ice on their roofs.
Payment received for insurance settlement						$ 881,000
Other Operating Income [Member]
Business Interruption Loss [Line Items]
Other income - business interruption claim	516,000
Gain on involuntary conversion of assets	704,000
Cost of Sales [Member]
Business Interruption Loss [Line Items]
Reimbursement of business operating expenses	$ 1,936,000

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Subsequent Event - USD ($)	Jan. 06, 2016	Feb. 18, 2016	Feb. 04, 2016
Subsequent Event [Line Items]
Stock repurchase program, Authorized amount, Increase		$ 20,000,000
Second Amended And Restated Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Termination date	Nov. 17, 2020
Second Amended and Restated Revolving Credit Agreement [Member] | Greenstone Farm Credit Services [Member]
Subsequent Event [Line Items]
Amount available on credit facility			$ 27,000,000
Second Amended and Restated Revolving Credit Agreement [Member] | American AgCredit [Member]
Subsequent Event [Line Items]
Amount available on credit facility			$ 123,000,000

Business Segments - Additional

Business Segments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015SawmillsSegmentReal_Estate
Segment Reporting [Abstract]
Number of reporting segments	4
Number of business units	3
Number of sawmills | Sawmills	2
Real estate developments | Real_Estate	4

Business Segments - Summary of

Business Segments - Summary of Company's Business Segments (Detail) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net sales
Net sales	$ 49,641	$ 50,150	$ 45,681	$ 48,379	$ 55,070	$ 58,301	$ 58,605	$ 55,379	$ 48,372	$ 56,520	$ 53,247	$ 41,563	$ 193,851	$ 227,355	$ 199,702
Operating income/(loss)
Operating income/(loss)	1,535	$ 2,034	$ 2,933	$ 4,516	7,073	$ 8,782	$ 9,734	$ 8,807	4,525	$ 9,599	10,991	$ 10,548	11,018	34,396	35,663
Equity in earnings of Del-Tin Fiber													0	0	1,084
Interest income													4	5	13
Interest and other debt expense, net of capitalized interest													(7,526)	(5,430)	(4,578)
Gain on bargain purchase									128		$ 3,285		0	0	3,413
Other income													258	284	3,229
Income before income taxes													3,754	29,255	38,824
Total assets at year-end
Total assets at year-end	539,167				527,132				411,344				539,167	527,132	411,344
Depreciation, amortization, and cost of fee timber harvested
Depreciation, amortization, and cost of fee timber harvested													21,096	18,342	15,131
Depreciation, amortization, and cost of fee timber harvested													21,096	18,342	15,131
Capital expenditures
Capital expenditures													37,805	20,332	24,649
Timberland acquisition expenditures													863	118,203	8,919
Operating Segments [Member] | Woodlands [Member]
Net sales
Net sales													38,770	37,008	33,834
Operating income/(loss)
Operating income/(loss)													20,141	19,113	16,749
Total assets at year-end
Total assets at year-end	360,124				363,436				247,156				360,124	363,436	247,156
Depreciation, amortization, and cost of fee timber harvested
Depreciation, amortization, and cost of fee timber harvested													7,351	5,765	4,785
Depreciation, amortization, and cost of fee timber harvested													7,351	5,765	4,785
Capital expenditures
Capital expenditures													3,667	4,038	3,836
Operating Segments [Member] | Manufacturing [Member]
Net sales
Net sales													160,688	189,561	167,955
Operating income/(loss)
Operating income/(loss)													8,381	31,440	38,496
Total assets at year-end
Total assets at year-end	92,077				80,023				85,837				92,077	80,023	85,837
Depreciation, amortization, and cost of fee timber harvested
Depreciation, amortization, and cost of fee timber harvested													13,315	12,147	9,910
Depreciation, amortization, and cost of fee timber harvested													13,315	12,147	9,910
Capital expenditures
Capital expenditures													24,363	12,311	16,532
Operating Segments [Member] | Real Estate [Member]
Net sales
Net sales													15,276	16,283	11,734
Operating income/(loss)
Operating income/(loss)													453	1,115	(1,430)
Total assets at year-end
Total assets at year-end	59,744				57,646				59,549				59,744	57,646	59,549
Depreciation, amortization, and cost of fee timber harvested
Depreciation, amortization, and cost of fee timber harvested													367	355	343
Depreciation, amortization, and cost of fee timber harvested													367	355	343
Capital expenditures
Capital expenditures													8,071	3,934	4,267
Operating Segments [Member] | Corporate [Member]
Operating income/(loss)
Operating income/(loss)													(17,325)	(17,405)	(17,994)
Total assets at year-end
Total assets at year-end	$ 27,222				$ 26,027				$ 18,802				27,222	26,027	18,802
Depreciation, amortization, and cost of fee timber harvested
Depreciation, amortization, and cost of fee timber harvested													63	75	93
Depreciation, amortization, and cost of fee timber harvested													63	75	93
Capital expenditures
Capital expenditures													1,704	49	14
Eliminations [Member]
Net sales
Net sales													(20,883)	(15,497)	(13,821)
Operating income/(loss)
Operating income/(loss)													$ (632)	$ 133	$ (158)

Business Segments - Summary 109

Business Segments - Summary of Company's Business Segments (Parenthetical) (Detail) - USD ($)	Apr. 01, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Sale proceeds of timberland		$ 1,000	$ 0	$ 0
Del-Tin Fiber [Member]
Segment Reporting Information [Line Items]
Percentage of company owning	100.00%

Financial Results by Quarter110

Financial Results by Quarter (Unaudited) - Quarterly Financial Results (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Data [Abstract]
Net sales	$ 49,641	$ 50,150	$ 45,681	$ 48,379	$ 55,070	$ 58,301	$ 58,605	$ 55,379	$ 48,372	$ 56,520	$ 53,247	$ 41,563	$ 193,851	$ 227,355	$ 199,702
Gross profit	5,749	5,989	7,150	9,378	10,447	14,046	14,455	13,930	8,977	14,810	14,648	15,384	28,266	52,878	53,819
Operating income	1,535	2,034	2,933	4,516	7,073	8,782	9,734	8,807	4,525	9,599	10,991	10,548	11,018	34,396	35,663
Net income	$ (128)	$ 38	$ 831	$ 1,913	$ 3,479	$ 5,974	$ 5,298	$ 4,911	$ 2,337	$ 5,813	$ 11,268	$ 6,774	$ 2,654	$ 19,662	$ 26,192
Earnings per common share
Basic	$ (0.01)	$ 0	$ 0.07	$ 0.15	$ 0.28	$ 0.47	$ 0.42	$ 0.39	$ 0.18	$ 0.46	$ 0.89	$ 0.53	$ 0.21	$ 1.56	$ 2.06
Assuming dilution	(0.01)	0	0.07	0.15	0.28	0.47	0.42	0.39	0.18	0.46	0.88	0.53	0.21	1.55	2.05
Dividends paid per common share	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.40	$ 0.40	$ 0.40

Financial Results by Quarter111

Financial Results by Quarter (Unaudited) - Quarterly Financial Results (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Data [Abstract]
Gain on bargain purchase	$ 128	$ 3,285	$ 0	$ 0	$ 3,413
Gain on previously held equity investment		$ 3,165	$ 0	$ 0	$ 3,165