PotlatchDeltic (PCH) 10-K 19 Feb 20 2019 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Feb. 14, 2020	Jun. 30, 2019
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	POTLATCHDELTIC CORPORATION
Entity Central Index Key	0001338749
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		67,351,801
Entity Public Float			$ 2,540.4
Entity Shell Company	false
Entity File Number	1-32729
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-0156045
Entity Address, Address Line One	601 West 1st Ave
Entity Address, Address Line Two	Suite 1600
Entity Address, City or Town	Spokane
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	99201
City Area Code	(509)
Local Phone Number	835-1500
Document Annual Report	true
Document Transition Report	false
Title of each class	Common Stock ($1 par value)
Trading symbol(s)	PCH
Name of each exchange on which registered	NASDAQ
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Portions of the definitive proxy statement for the 2020 annual meeting of stockholders expected to be filed with the Commission on or about March 31, 2020 are incorporated by reference in Part III hereof.

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Revenues		$ 827,098		$ 974,579		$ 678,595
Costs and expenses:
Cost of goods sold		682,066		707,645		469,393
Selling, general and administrative expenses		57,925		59,861		49,996
Gain on sale of facility		(9,176)
Deltic merger-related costs	[1]			22,119		3,409
Environmental charges for Avery Landing						4,978
Gain on lumber price swap						(1,088)
Total costs and expenses		730,815		789,625		526,688
Operating income		96,283		184,954		151,907
Interest expense, net	[2]	(30,361)		(35,227)		(27,049)
Loss on extinguishment of debt		(5,512)
Non-operating pension and other postretirement employee benefit costs		(3,739)		(7,648)		(6,384)
Income before income taxes		56,671		142,079		118,474
Income tax provision		(1,010)		(19,199)		(32,021)
Net income		$ 55,661		$ 122,880		$ 86,453
Net income per share:
Basic (in dollars per share)		$ 0.82	[3]	$ 2.03	[3]	$ 2.12
Diluted (in dollars per share)		0.82	[3]	1.99	[3]	2.10
Dividends/Special distribution per share		$ 1.60		$ 1.60		$ 1.53
Weighted-average shares outstanding (in thousands)
Basic (in shares)		67,608		60,534		40,824
Diluted (in shares)		67,743		61,814		41,227
Deltic [Member]
Costs and expenses:
Deltic merger-related costs				$ 22,100		$ 3,400
Net income per share:
Dividends/Special distribution per share				$ 3.54
[1]	For integration and restructuring costs related to the merger with Deltic see Note 2: Merger with Deltic.
[2]	Bond discounts and deferred loan fees are reported within interest expense on the Consolidated Statements of Income
[3]	Per share amounts are computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the total computed for the year.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 55,661	$ 122,880	$ 86,453
Other comprehensive (loss) income, net of tax:
Net (loss) gain arising during the period, net of tax (benefit) expense of $(1,348), $(5,521) and $3,990	(3,836)	(15,714)	11,355
Amortization of actuarial loss included in net periodic cost, net of tax expense of $3,772, $4,654 and $6,248	10,737	13,246	9,773
Amortization of prior service credit included in net periodic cost, net of tax benefit of $(2,244), $(2,259) and $(3,350)	(6,389)	(6,432)	(5,239)
Cash flow hedges, net of tax (benefit) expense of $(978), $(119) and $3	(18,440)	(2,415)	4
Other comprehensive (loss) income, net of tax	(17,928)	(11,315)	15,893
Comprehensive income	$ 37,733	$ 111,565	$ 102,346

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net loss (gain) arising during the period, tax (benefit) expense	$ 1,348	$ 5,521	$ 3,990
Amortization of actuarial loss included in net periodic cost, tax expense	3,772	4,654	6,248
Amortization of prior service credit included in net periodic cost, tax benefit	2,244	2,259	3,350
Cash flow hedges, tax (benefit) expense	$ 978	$ 119	$ 3

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 83,310	$ 76,639
Customer receivables, net of allowance for doubtful accounts of $751 and $368	14,167	21,405
Inventories, net	65,781	60,805
Other current assets	20,183	22,675
Assets held for sale		80,674
Total current assets	183,441	262,198
Property, plant and equipment, net	286,383	272,193
Investment in real estate held for development and sale	74,233	79,537
Timber and timberlands, net	1,638,663	1,672,815
Intangible assets, net	17,049	17,828
Other long-term assets	35,290	21,281
Total assets	2,235,059	2,325,852
Current liabilities:
Accounts payable and accrued liabilities	60,577	60,993
Current portion of long-term debt	45,974	39,973
Current portion of pension and other postretirement employee benefits	6,701	5,997
Liabilities held for sale		29,321
Total current liabilities	113,252	136,284
Long-term debt	710,495	715,391
Pension and other postretirement employee benefits	115,463	110,659
Deferred tax liabilities, net	20,165	32,009
Other long-term obligations	48,853	16,730
Total liabilities	1,008,228	1,011,073
Commitments and contingencies
Stockholders’ equity:
Preferred stock, authorized 4,000 shares, no shares issued
Common stock, $1 par value, authorized 100,000 shares, issued 67,221 and 67,570 shares	67,221	67,570
Additional paid-in capital	1,666,299	1,659,031
Accumulated deficit	(359,330)	(282,391)
Accumulated other comprehensive loss	(147,359)	(129,431)
Total stockholders’ equity	1,226,831	1,314,779
Total liabilities and stockholders' equity	$ 2,235,059	$ 2,325,852

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 751	$ 368
Preferred stock, authorized	4,000,000	4,000,000
Preferred stock, issued	0	0
Common stock, par value	$ 1	$ 1
Common stock, authorized	100,000,000	100,000,000
Common stock, issued	67,221,000	67,570,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 55,661	$ 122,880	$ 86,453
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	72,105	73,161	29,912
Basis of real estate sold	20,554	16,698	6,827
Gain on sale of facility	(9,176)
Loss on extinguishment of debt	5,512
Change in deferred taxes	(11,045)	12,161	15,364
Pension and other postretirement employee benefits	11,877	16,443	13,151
Equity-based compensation expense	7,272	8,206	5,379
Other, net	(2,324)	(1,221)	(2,529)
Change in working capital, net of business acquired:
Receivables, net	7,238	2,822	3,602
Inventories, net	(3,519)	273	2,490
Other assets	5,305	(3,996)	(15)
Accounts payable and accrued liabilities	(11,415)	(5,212)	11,591
Other liabilities	3,955	(692)	1,072
Real estate development expenditures	(7,254)	(5,049)	0
Funding of pension and other postretirement employee benefits	(5,678)	(57,580)	(10,638)
Net cash provided by operating activities	139,068	178,894	162,659
CASH FLOWS FROM INVESTING ACTIVITIES
Property, plant and equipment additions	(39,153)	(29,880)	(12,855)
Timberlands reforestation and roads	(17,695)	(17,378)	(15,207)
Acquisition of timber and timberlands	(626)	(4,877)	(22,043)
Proceeds on disposition of property, plant and equipment	2,389	45	94
Proceeds on sale of facility	58,793
Cash and cash equivalents acquired in Deltic merger		3,419
Transfer from company owned life insurance (COLI)	1,968	1,796	1,278
Transfer to COLI	(1,148)	(1,027)	(1,324)
Other, net	(11)	(7)	37
Net cash provided by (used in) investing activities	4,517	(47,909)	(50,020)
CASH FLOWS FROM FINANCING ACTIVITIES
Distributions to common stockholders	(107,722)	(146,768)	(61,931)
Repurchase of common stock	(25,173)
Proceeds from Potlatch revolving line of credit		100,000
Repayment of revolving line of credit		(100,000)
Proceeds from issue of long-term debt	190,000	100,000
Repayment of long-term debt	(190,000)	(14,250)	(11,000)
Premiums and fees on debt retirement	(4,865)
Other, net	(1,012)	(4,983)	(1,835)
Net cash used in financing activities	(138,772)	(172,001)	(74,766)
Change in cash, cash equivalents and restricted cash	4,813	(41,016)	37,873
Cash, cash equivalents and restricted cash at beginning of period	79,441	120,457	82,584
Cash, cash equivalents and restricted cash at end of period	84,254	79,441	120,457
NONCASH INVESTING AND FINANCING ACTIVITIES
Long-term debt assumed by buyer in sale of facility	29,000
Accrued property, plant and equipment additions	1,396	339	127
Accrued timberlands reforestation and roads	352	199	576
Earnings and profits distribution		177,565
Cash paid during the year for:
Interest, net of amounts capitalized	32,282	34,490	26,125
Income taxes, net	$ 7,148	10,800	$ 15,845
Deltic [Member]
CASH FLOWS FROM FINANCING ACTIVITIES
Repayment of revolving line of credit		(106,000)
NONCASH INVESTING AND FINANCING ACTIVITIES
Equity issued as consideration for our merger with Deltic		$ 1,142,775

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balance, beginning of period at Dec. 31, 2016	$ 156,274	$ 40,519	$ 355,274	$ (128,775)	$ (110,744)
Balance, beginning of period (shares) at Dec. 31, 2016		40,519
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	86,453			86,453
Equity-based compensation expense	$ 4,722		4,722
Shares issued for stock compensation		$ 93	(93)
Shares issued for stock compensation (share)		93
Repurchase of common stock (shares)	0
Pension plans and OPEB obligations	$ 15,889				15,889
Cash flow hedges	4				4
Common distributions, $1.525 per share 2017, $1.60 per share 2018, $1.60 per share 2019	(61,931)			(61,931)
Other transactions, net	(869)		(759)	(110)
Balance, end of period at Dec. 31, 2017	200,542	$ 40,612	359,144	(104,363)	(94,851)
Balance, end of period (shares) at Dec. 31, 2017		40,612
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	122,880			122,880
Equity-based compensation expense	$ 8,206		8,206
Shares issued for stock compensation		$ 162	(162)
Shares issued for stock compensation (share)		162
Repurchase of common stock (shares)	0
Pension plans and OPEB obligations	$ (8,900)				(8,900)
Cash flow hedges	(2,415)				(2,415)
Cumulative effects of adoption of accounting standards	1,299			24,564	(23,265)
Common distributions, $1.525 per share 2017, $1.60 per share 2018, $1.60 per share 2019	(102,333)			(102,333)
Common stock issued for Deltic merger	1,142,775	$ 21,981	1,120,794
Common stock issued for Deltic merger (shares)		21,981
Deltic earnings and profit special distribution, $3.54 per share	(44,435)	$ 4,815	172,750	(222,000)
Deltic earnings and profit special distribution (shares)		4,815
Other transactions, net	(2,840)		(1,701)	(1,139)
Balance, end of period at Dec. 31, 2018	1,314,779	$ 67,570	1,659,031	(282,391)	(129,431)
Balance, end of period (shares) at Dec. 31, 2018		67,570
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	55,661			55,661
Equity-based compensation expense	7,272		7,272
Shares issued for stock compensation		$ 337	(337)
Shares issued for stock compensation (share)		337
Repurchase of common stock	$ (25,173)	$ (686)		(24,487)
Repurchase of common stock (shares)	(686,240)	(686)
Pension plans and OPEB obligations	$ 512				512
Cash flow hedges	(18,440)				(18,440)
Common distributions, $1.525 per share 2017, $1.60 per share 2018, $1.60 per share 2019	(107,722)			(107,722)
Other transactions, net	(58)		333	(391)
Balance, end of period at Dec. 31, 2019	$ 1,226,831	$ 67,221	$ 1,666,299	$ (359,330)	$ (147,359)
Balance, end of period (shares) at Dec. 31, 2019		67,221

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common dividends, per share	$ 1.60	$ 1.60	$ 1.525
Deltic [Member] | Special Distribution [Member]
Common dividends, per share		$ 3.54

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES GENERAL PotlatchDeltic Corporation and its subsidiaries (collectively referred to in this report as the company, us, we or our) is a leading timberland Real Estate Investment Trust (REIT) with operations in seven states. We are engaged in activities associated with timberland management, including the sale of timber, the management of approximately 1.9 million acres of timberlands and the purchase and sale of timberlands. We are also engaged in the manufacture and sale of wood products and the development of real estate. Our timberlands, real estate development projects and all of our wood products facilities are located within the continental United States. The primary market for our products is the United States. We converted to a REIT effective January 1, 2006. As described in Note 2: Deltic Merger CONSOLIDATION The Consolidated Financial Statements USE OF ESTIMATES The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, which we refer to in this report as U.S. GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates and assumptions. Cash, Cash Equivalents and Restricted Cash Cash equivalents are investments that are highly liquid with original maturities of three months or less when purchased. At December 31, 2019 and 2018 we had restricted cash of $0.9 million and $2.8 million, respectively included in other long-term assets related to proceeds held by a qualified intermediary that are intended to be reinvested in timberlands. The following provides a reconciliation of cash, cash equivalents, and restricted cash at December 31: (in thousands) 2019 2018 2017 Cash and cash equivalents $ 83,310 $ 76,639 $ 120,457 Restricted cash included in other long-term assets 944 2,802 — Total cash, cash equivalents, and restricted cash $ 84,254 $ 79,441 $ 120,457 BUSINESS COMBINATIONS We recognize identifiable assets acquired and liabilities assumed at their acquisition date estimated fair value. Goodwill, if any, as of the acquisition date is measured as the excess of consideration transferred over the net of the acquisition date estimated fair value of the assets acquired and the liabilities assumed. While we use our best estimates and assumptions for the purchase price allocation process to value assets acquired and liabilities assumed at the acquisition date, our estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, we record adjustments to the assets acquired and liabilities assumed to the extent that we identify adjustments to the preliminary purchase price allocation. We recognize measurement period adjustments and any resulting effect on earnings during the period in which the adjustment is identified. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to our Consolidated Statements of Income REVENUE RECOGNITION We recognize revenue in accordance with the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic No. 606, Revenue from Contracts with Customers For our Timberlands segment we generate revenue predominantly in the form of delivered logs, pay-as-cut stumpage contracts, lump sum stumpage contracts and timber deeds. For our Wood Products segment we generate revenue from the sale of manufactured wood products and residual by-products. For our Real Estate segment, we generate revenue from the sale of rural real property deemed non-strategic or identified as having higher and better use alternatives and real estate development and subdivision activity. A performance obligation, as defined in ASC 606, is a promise in a contract to transfer a distinct good or service to a customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue at the point in time, or over the period in which the performance obligation is satisfied. We recognize revenues when control of promised goods or services (performance obligations) is transferred to customers, in an amount that reflects the consideration expected in exchange for those goods or services (transaction price). Performance Obligations On delivered log sales, revenue includes amounts billed for logging and hauling and is recognized at the point the logs are delivered and scaled. Revenue is recognized on timber deeds and lump sum stumpage contracts generally upon closing or when the contracts are effective, which is the point at which the buyer assumes risk of loss associated with the standing timber. We enter into pay-as-cut contracts with customers that provide the customer with the right of access to harvest timber on a specified area of our land. At the execution of the agreement, the customer typically does not take title, control or risk of ownership to the timber. Revenue for pay-as-cut contracts is recognized once scaling occurs as that is the point when control of the harvested trees has transferred to the customer and we have a right to payment. Performance obligations associated with the sale of wood products are typically satisfied when the products are shipped (FOB shipping point) or upon delivery to our customer (FOB destination) depending on the terms of the customer contract. Shipping and handling costs for all wood product, log hauling costs and residual sales are accounted for as cost of goods sold in our Consolidated Statements of Income Performance obligations associated with real estate sales are generally satisfied at a point in time when all conditions of closing have been met and title transfers to the buyer. ASC Topic 606 requires entities to consider significant financing components of contracts with customers, though allows for the use of a practical expedient when the period between satisfaction of a performance obligation and payment receipt is one year or less. Given the nature of our revenue transactions, we have elected to utilize this practical expedient. Contract Estimates Substantially all of the company’s performance obligations are satisfied as of a point in time. The transaction price for log sales generally equals the amount billed to our customer for logs delivered during the accounting period. For the limited number of log sales subject to a long-term supply agreement, the transaction price is variable but is known at the time of billing. For wood products sales, the transaction price is typically the amount billed to the customer for the products shipped but may be reduced slightly for estimated cash discounts and rebates. There are no significant contract estimates related to the real estate business. See Note 4: Revenue Recognition INVENTORIES For most of our operations, we use the last-in, first-out (LIFO) method of valuing log, lumber and plywood inventory. An actual valuation of inventory under the LIFO method occurs only at the end of each year based on the inventory levels and costs at that time. Interim LIFO calculations are based on management’s best estimates of expected year-end inventory levels and costs and are subject to the final year-end LIFO inventory valuation. Inventories valued under LIFO are stated as the lower of cost or market. All segment inventories are reported using the average cost method. The LIFO reserve and intersegment eliminations are recorded at the corporate level. Inventories not valued under LIFO are recorded at the lower of average cost or net realizable value. Expenses associated with idle capacity or abnormally low production are reflected in cost of goods sold in the periods incurred. See Note 7: Inventories PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment are valued at cost less accumulated depreciation. Depreciation of buildings, equipment and other depreciable assets is determined using the straight-line method of depreciation. Major improvements and replacements of property are capitalized. Maintenance, repairs and minor improvements and replacements are expensed. Upon retirement or other disposition of property, applicable cost and accumulated depreciation are removed from the accounts. Any gains or losses are included in operating income. See Note 8: Property, Plant and Equipment RECOVERY OF LONG-LIVED ASSETS Our long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. We evaluate recoverability of an asset group by comparing its carrying value to the future net undiscounted cash flows that we expect will be generated by the asset group. If the comparison indicates that the carrying value of an asset group is not recoverable, we recognize an impairment loss for the excess of carrying value over the estimated fair value. When we recognize an impairment loss for assets to be held and used, we depreciate the adjusted carrying amount of those assets over their remaining useful life. We also perform a test for recoverability when management has committed to a plan to sell or otherwise dispose of an asset group. Assets to be disposed of are reported at the lower of carrying amount or fair value less cost to sell. There were no events or changes in circumstances that indicated the carrying amounts of our long-lived held and used assets were not recoverable during the years ended December 31, 2019, 2018 or 2017. For the years ended December 31, 2019, 2018 and 2017 we recorded loss on disposal of property, plant and equipment of $0.9 million, $0.7 million and $0.2 million, respectively. TIMBER AND TIMBERLANDS Timber and timberlands are valued at cost less accumulated depletion and amortization. We capitalize costs related to stand establishment, which include the preparation of the land for planting, seeds or seedlings and tree planting costs, which include third-party labor costs, materials and other contract services. Upon completion of planting activities and field inspection to confirm the planting operation was successful, a plantation is considered “established.” Subsequent expenditures to maintain the integrity or enhance the growth of an established plantation or stand are expensed. Post-establishment expenses include vegetation control, fertilization, thinning operations and the replanting of seedlings lost through mortality. Forest management costs are considered current operating expenses and include property taxes and insurance, silviculture costs incurred subsequent to stand establishment, cruising of timber volume, property maintenance, salaries, supplies, travel, record-keeping, fire protection and other normal recurring administrative personnel costs. Timberland acquisitions are capitalized based on the relative appraised values of timberland, merchantable timber, pre-production timber (young growth that is not yet merchantable timber), logging roads and other land improvements. The estimated volume of current standing merchantable timber, which is a component of calculating our depletion rates, is updated at least annually to reflect increases due to the reclassification of pre-production timber to merchantable timber when it meets defined diameter specifications, the annual growth of merchantable timber and the acquisition of additional merchantable timber, decreases due to timber harvests and land sales and changes resulting from other factors, such as casualty losses. Timber volumes are estimated from cruises of the timber tracts, which are completed on our timberlands on approximately a five to ten year cycle. Depletion represents the amount charged to expense as timber is harvested. Rates at which timber is depleted are calculated annually for each of our depletion pools by dividing the beginning of year balance of the merchantable timber accounts by the volume of standing merchantable timber, after estimated timber volume updates. The base cost of logging roads, such as clearing, grading and ditching, is not amortized and remains a capitalized item until disposition. Other portions of the initial logging road cost, such as bridges, culverts and gravel surfacing are amortized over their useful lives, which range from 5 to 20 years. Costs associated with temporary logging road spurs, which are typically used for one harvest season, are expensed as incurred. See Note 9: Timber and Timberlands INTANGIBLE ASSETS We recorded intangible assets in connection with the Deltic merger in 2018. We have both indefinite-lived and long-lived intangible assets. Long-lived intangible assets include customer relationships and certain trade names we estimate have a finite life and are being amortized over 10 and 20 years, respectively, and are evaluated for impairment under our Recovery of Long-Lived Assets policy described above. Indefinite-lived intangible assets are not amortized and are tested for potential impairments annually as of October 1, or during the year if an event or other circumstance indicates that we may not be able to recover the carrying amount of the assets. We did not impair any intangible assets during the years ended December 31, 2019 or 2018. See Note 10: Intangible Assets LEASES We lease certain equipment, office space and land. Right-of-use (ROU) assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating and finance lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate in determining the present value of lease payments. We consider our recent debt issuances as well as publicly available data for instruments with similar characteristics when calculating our incremental borrowing rates. Most leases include one or more options to renew, with renewal terms that can extend the lease term between one to five years. The exercise of lease renewal options is at our sole discretion. Under the operating lease model, lease expense is recognized on a straight-line basis over the lease term. Under the finance lease model, lease expense consists of the amortization of the ROU asset on a straight-line basis over the asset’s estimated useful life and interest expense calculated using the effective interest method. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. For certain equipment leases, we apply a portfolio approach to effectively account for the operating lease ROU assets and liabilities. For certain equipment leases, such as vehicles, we account for the lease and non-lease components as a single lease component. Certain leases also include options to purchase the leased equipment. The depreciable life of assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise. Certain of our rental payments are adjusted periodically for inflation. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants and we do not have any significant sublease income. See Note 13: Leases DERIVATIVE INSTRUMENTS We use, from time to time, certain derivative instruments to mitigate exposure to volatility in interest rates and effectively convert a portion of floating rate debt to a fixed rate basis, thus reducing the impact of interest rate changes on future interest expense and cash flows. All derivatives, whether designated as a hedging relationship or not, are recorded in the Consolidated Balance Sheets A fair value hedge is a derivative instrument designated for the purpose of hedging the exposure to changes in fair value of an asset or a liability resulting from a particular risk. If the derivative is designated as a fair value hedge, the changes in the fair value of the derivative and of the hedged item attributable to the hedged risk are both recognized in the results of operations and presented in the same caption in the Consolidated Statements of Income Consolidated Statements of Comprehensive Income For a cash flow hedge, the fair value of the effective portion of the derivative is recognized as an asset or liability with a corresponding amount in Accumulated Other Comprehensive Loss Consolidated Balance Sheets . Accumulated Other Comprehensive Loss If a hedge ceases to qualify for hedge accounting, the contract would continue to be carried on the balance sheet at fair value until settled and adjustments to the contract’s fair value would be recognized in earnings. If a forecasted transaction were no longer probable of occurring, amounts previously deferred in accumulated other comprehensive income (loss) would be recognized immediately in earnings. For derivative instruments not designated as hedges, the change in fair value of the derivative is recognized in earnings each reporting period. We have International Swap Dealers Association ("ISDA") Master Agreements with each counterparty that permits the net settlement of amounts owed under the respective contracts. The ISDA Master Agreement is an industry standardized contract that governs all derivative contracts entered into between the company and the respective counterparty. Under these master netting agreements, net settlement generally permits the company or the counterparty to determine the net amount payable or receivable for contracts due on the same date for similar types of derivative transactions. We have not elected to offset the fair value positions of the derivative contracts recorded in the Consolidated Balance Sheets Note: 15 Derivative Instruments COMPANY OWNED LIFE INSURANCE We are the beneficiary of insurance policies on the lives of certain past officers and employees. We have recognized the amount that could be realized upon surrender of the insurance policies in other assets in our Consolidated Balance Sheets Consolidated Statements of Income Consolidated Statements of Cash Flows . PENSION AND OTHER POSTRETIREMENT BENEFITS We recognize any overfunded or underfunded status of our defined benefit pension and other postretirement plans on our Consolidated Balance Sheets • costs of benefits provided in exchange for employees’ services rendered; • interest cost of the obligation; • expected long-term return on plan assets for funded plans; • amortization of prior service costs and plan amendments over the average remaining service period of the active employee group covered by the plan; and • amortization of cumulative unrecognized net actuarial gains and losses – generally in excess of 10 percent of the greater of the benefit obligation or market-related value of plan assets at the beginning of the year – over the average remaining service period of the active employee group covered by the plan. Different assumptions would change the net periodic pension and postretirement benefit costs and the obligation of the benefit plans. See Note 19: Savings Plans, Pension Plans and Other Postretirement Employee Benefits EQUITY-BASED COMPENSATION Equity-based awards are measured at estimated fair value on the dates they are granted or modified. These measurements establish the cost of the equity-based awards for accounting purposes. Equity-based compensation expense is recognized over the awards’ applicable vesting period using the straight-line method. See Note 17: Equity-Based Compensation Plans INCOME TAXES We use the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases, operating loss carryforwards and tax credit carryforwards. Deferred tax assets and liabilities are measured pursuant to tax laws using rates expected to apply to taxable income in the years in which the temporary differences are expected to be recovered or settled. We recognize the effect of a change in income tax rates on deferred tax assets and liabilities in the Consolidated Statements of Income Consolidated Statements of Comprehensive Income We recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities. The determination is based on the technical merits of the position and presumes that each uncertain tax position will be examined by the relevant taxing authority that has full knowledge of all relevant information. See Note 18: Income Taxes NEW ACCOUNTING PRONOUNCEMENTS In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) • to not reassess whether any expired or existing contracts are or contain leases; • to not reassess the lease classification for any expired or existing leases; • to not reassess initial direct costs for any existing leases; • to apply the short-term lease recognition exemption for all leases that qualify; • to not separate non-lease components from lease components; and • to apply the land easement practical expedient for transition of all existing land easements. Upon adoption of this ASU we recorded approximately $14.0 million for right of use assets and lease liabilities for our operating leases on our Consolidated Balance Sheet Consolidated Statement of Income Consolidated Statement of Cash Flows. Note 13: Leases In August 2018, the FASB issued ASU No. 2018-15 Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract In August 2018, the FASB issued ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement

Merger with Deltic

Merger with Deltic	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Merger with Deltic	NOTE 2. Merger with Deltic On February 20, 2018 (merger date), Deltic Timber Corporation (Deltic) merged into a wholly-owned subsidiary of Potlatch Corporation. Deltic owned approximately 530,000 acres of timberland, operated two sawmills, a medium density fiberboard facility (MDF) and was engaged in real estate development primarily in Arkansas. The merger created a combined company with a diversified timberland base of approximately 1.9 million acres, including approximately 930,000 acres in Arkansas. It uniquely positions us to expand our integrated model of timberland ownership and lumber manufacturing, provide s tax savings on Deltic’s timber harvest earnings and increase our exposure to the Texas housing market. Under the merger agreement, each issued and outstanding share of Deltic common stock was exchanged for 1.80 shares of Potlatch common stock, with cash paid in lieu of any fractional shares. Upon consummation of the merger with Deltic, all outstanding Deltic stock options (which fully vested as of the merger date) and restricted stock units (RSUs) were converted into Potlatch RSUs, after giving effect to the 1.8 exchange ratio. Because the Deltic stock options were fully vested and relate to services rendered to Deltic prior to the merger, the replacement stock options were also fully vested, and their fair value is included in the consideration transferred. A portion of the replacement RSUs relate to services to be performed post-merger and therefore are not included in consideration transferred. See additional details about replacement share-based payment awards in Note 17: Equity-Based Compensation Plans . The acquisition of total assets of $1.4 billion was a noncash investing and financing activity comprised of $1.1 billion in equity consideration transferred to Deltic shareholders and $0.3 billion of liabilities assumed. We expensed approximately $22.1 million and $3.4 million of merger-related costs during the years ended December 31, 2018 and 2017, respectively. Total merger-related costs consisted of: • $12.2 million and $3.3 million of merger-related costs during the years ended December 31, 2018 and 2017, respectively, for professional fees such as investment banker fees, legal, accounting and appraisal services; and • $9.9 million and $0.1 million of restructuring related costs during the years ended December 31, 2018 and 2017, respectively, primarily for termination benefits, which includes accelerated share-based payment costs, for qualifying terminations. These costs are included in Deltic merger-related costs in our Consolidated Statements of Income . The amount of revenue and income before taxes from the acquired Deltic operations included in our Consolidated Statement of Income The following summarizes unaudited pro forma information that presents combined amounts as if this merger occurred at the beginning of 2017: Year Ended December 31, (in thousands, except per share amounts) 2018 2017 Net sales $ 1,013,242 $ 920,860 Net earnings attributable to PotlatchDeltic common shareholders $ 145,685 $ 77,732 Basic earnings per share attributable to PotlatchDeltic common shareholders $ 2.16 $ 1.15 Diluted earnings per share attributable to PotlatchDeltic common shareholders $ 2.15 $ 1.15 Pro forma net earnings attributable to PotlatchDeltic common shareholders excludes $27.6 million and $16.8 million of non-recurring merger-related costs incurred by both companies during the years ended December 31, 2018 and 2017, respectively, of which $18.9 million were incurred by Deltic prior to the merger. Pro forma basic and diluted earnings per share assumes issuance of 22.0 million shares that were issued at the merger date and the issuance of 4.8 million shares for the Deltic earnings and profits special distribution as of the beginning of 2017. Refer to Note 6: Earnings Per Share. The following table summarizes the estimated fair value measurements of assets acquired and liabilities assumed as of the merger date, including measurement period adjustments identified: (in thousands) Preliminary Allocation Measurement Period Adjustments Final Allocation ASSETS Cash and cash equivalents $ 3,419 $ — $ 3,419 Customer receivables 12,709 — 12,709 Inventories 17,316 — 17,316 Other current assets 8,276 (2,991 ) 5,285 Real estate held for development and sale 79,000 4,000 83,000 Property, plant and equipment 265,901 (5,132 ) 260,769 Timber and timberlands 1,060,000 (4,255 ) 1,055,745 Mineral rights — 6,236 6,236 Trade name and customer relationships intangibles 19,000 500 19,500 Other long-term assets 2,010 1,546 3,556 Total assets acquired 1,467,631 (96 ) 1,467,535 LIABILITIES Accounts payable and accrued liabilities 12,604 11 12,615 Long-term debt 229,968 144 230,112 Pension and other postretirement employee benefits 36,909 — 36,909 Deferred tax liabilities, net 44,439 (251 ) 44,188 Other long-term liabilities 936 — 936 Total liabilities assumed 324,856 (96 ) 324,760 Net assets acquired $ 1,142,775 $ — $ 1,142,775 The initial allocation of purchase price was recorded using the preliminary estimated fair value of assets acquired and liabilities assumed based upon the best information available to management at the time. The purchase price allocation was finalized as of December 31, 2018. The measurement period adjustments reflect additional information obtained to record the fair value of certain assets acquired and liabilities assumed based on facts and circumstances existing as of the acquisition date. Measurement period adjustments reflected above did not have a material impact to earnings or cash flows for the year ended December 31, 2018.

Sale of Deltic MDF Facility

Sale of Deltic MDF Facility	12 Months Ended
	Dec. 31, 2019
Discontinued Operations And Disposal Groups [Abstract]
Sale of Deltic MDF Facility	NOTE 3. SALE OF DELTIC MDF FACILITY On December 20, 2018, we entered into an Asset Purchase and Sale Agreement with Roseburg Forest Products Co. to sell our Deltic Medium Density Fiberboard (MDF) facility for $92.0 million, consisting of $63.0 million in cash and assumption of $29.0 million of revenue bonds. The price was subject to post-closing adjustments for certain changes in working capital as defined in the purchase and sale agreement. The transaction closed on February 12, 2019 resulting in a $9.2 million pre-tax gain on sale. Cash proceeds received after working capital adjustments, closing costs and other expenses were approximately $58.8 million. A portion of the purchase price is escrowed pending satisfaction of certain covenants as outlined in the Agreement. In addition, we had a carryover tax basis in the facility from the Deltic merger, and as a result, we recorded a reduction to deferred tax liabilities and increase to income taxes payable of $15.8 million at the date of sale. At December 31, 2018 the assets and liabilities disposed met the criteria to be classified as held for sale and are reflected as such at their carrying value. At December 31, 2018, assets held for sale on the Consolidated Balance Sheets Consolidated Balance Sheets

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Revenue Recognition	NOTE 4. REVENUE RECOGNITION The following table represents our revenues by major product. We adopted ASC 606, Revenue from Contracts with Customers Revenue Recognition Note 1: Summary of Significant Accounting Policies Note 5: Segment Information Year Ended December 31, (in thousands) 2019 2018 2017 Timberlands Northern region Sawlogs $ 161,570 $ 205,977 $ 190,693 Pulpwood 5,767 5,996 5,634 Stumpage 109 176 153 Other 1,970 1,801 1,387 Total Northern revenues 169,416 213,950 197,867 Southern region Sawlogs 88,048 81,460 40,993 Pulpwood 53,315 48,585 34,907 Stumpage 1,666 2,434 557 Other 10,248 8,521 3,875 Total Southern revenues 153,277 141,000 80,332 Total Timberlands revenues 322,693 354,950 278,199 Wood Products Lumber 396,648 464,180 313,083 Residuals and Panels 143,760 216,751 128,074 Total Wood Products revenues 540,408 680,931 441,157 Real Estate Rural real estate 49,675 36,024 30,655 Development real estate 22,363 12,852 — Other 1 6,834 5,690 — Total Real Estate revenues 78,872 54,566 30,655 Total segment revenues 941,973 1,090,447 750,011 Intersegment Timberlands revenues 2 (114,875 ) (115,868 ) (71,416 ) Total consolidated revenues $ 827,098 $ 974,579 $ 678,595 1 Other Real Estate revenues primarily relate to the Chenal Country Club. 2 Intersegment revenues represent logs sold by our Timberlands segment to the Wood Products segment. Contract Balances In general, a customer receivable is recorded as we deliver wood products, logs and residuals. We generally receive payment shortly after products have been received by our customers. At December 31, 2019 and 2018, we recorded $5.5 million and $4.3 million, respectively, for contract liabilities recorded as deferred revenue. These contract liabilities predominately relate to hunting and other access rights on our timberlands and member related activities at the Chenal Country Club. These contract liabilities are recognized over the term of the contracts, which is typically twelve months or less, except membership initiation fees at the Chenal Country Club which typically are recognized up to 10 years. Other contract asset and liability balances, such as prepayments, are immaterial. For real estate sales, we typically receive the entire consideration in cash at closing.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Segment Information	NOTE 5. SEGMENT INFORMATION Our businesses are organized into three reportable operating segments: Timberlands, Wood Products and Real Estate. Management activities in the Timberlands segment include planting and harvesting trees and building and maintaining roads. The Timberlands segment also generates revenues from non-timber resources such as hunting leases, recreation permits and leases, mineral rights contracts, oil and gas royalties, biomass production and carbon sequestration. The Wood Products segment manufactures and markets lumber and plywood. The Real Estate segment includes the sale of land holdings deemed non-strategic or identified as having higher and better use alternatives, master planned community development and a country club. The reportable segments follow the same accounting policies used for our Consolidated Financial Statements, Note 1: Summary of Significant Accounting Policies Management primarily evaluates the performance of its segments and allocates resources to them based upon Adjusted EBITDDA. EBITDDA is calculated as net income (loss) before interest expense, income taxes, basis of real estate sold, depreciation, depletion and amortization. Adjusted EBITDDA further excludes certain specific items that are considered to hinder comparison of the performance of our businesses either year-on-year or with other businesses. Management uses Adjusted EBITDDA to compare the operating performance of segments on a consistent basis and to evaluate the performance and effectiveness of each segment’s operational strategies. Our calculation of Adjusted EBITDDA may not be comparable to that reported by other companies. The following table summarizes information for each of the company’s reportable segments and includes a reconciliation of Total Adjusted EBITDDA to income before income taxes. Corporate information is included to reconcile segment data to the Consolidated Financial Statements Year Ended December 31, (in thousands) 2019 2018 2017 Revenues: Timberlands $ 322,693 $ 354,950 $ 278,199 Wood Products 540,408 680,931 441,157 Real Estate 78,872 54,566 30,655 941,973 1,090,447 750,011 Intersegment Timberlands revenues 1 (114,875 ) (115,868 ) (71,416 ) Total consolidated revenues $ 827,098 $ 974,579 $ 678,595 Adjusted EBITDDA: Timberlands $ 133,987 $ 169,834 $ 126,707 Wood Products 12,901 130,583 80,624 Real Estate 62,650 40,304 25,720 Corporate (36,257 ) (37,785 ) (34,302 ) Eliminations and adjustments 5,662 (5,743 ) (2,992 ) Total Adjusted EBITDDA 178,943 297,193 195,757 Basis of real estate sold (20,554 ) (16,698 ) (6,827 ) Depreciation, depletion and amortization (70,417 ) (70,848 ) (28,432 ) Interest expense, net 2 (30,361 ) (35,227 ) (27,049 ) Loss on extinguishment of debt (5,512 ) - - Non-operating pension and other postretirement employee benefits (3,739 ) (7,648 ) (6,384 ) Loss on fixed assets (865 ) (725 ) (204 ) Gain on sale of facility 9,176 — — Inventory purchase price adjustment in cost of goods sold 3 — (1,849 ) — Deltic merger-related costs 4 — (22,119 ) (3,409 ) Environmental charges for Avery Landing — — (4,978 ) Income before income taxes $ 56,671 $ 142,079 $ 118,474 Depreciation, depletion and amortization: Timberlands $ 46,601 $ 48,201 $ 20,476 Wood Products 22,059 21,416 7,347 Real Estate 678 418 2 Corporate 1,079 813 607 70,417 70,848 28,432 Bond discount and deferred loan fees 2 1,688 2,313 1,480 Total depreciation, depletion and amortization $ 72,105 $ 73,161 $ 29,912 Basis of real estate sold: Real Estate $ 20,749 $ 16,954 $ 7,114 Elimination and adjustments (195 ) (256 ) (287 ) Total basis of real estate sold $ 20,554 $ 16,698 $ 6,827 Assets: Timberlands 5 $ 1,655,407 $ 1,693,162 $ 669,288 Wood Products 398,465 456,306 154,479 Real Estate 6 87,421 93,208 952 2,141,293 2,242,676 824,719 Corporate 93,766 83,176 128,360 Total consolidated assets $ 2,235,059 $ 2,325,852 $ 953,079 Capital Expenditures: 7 Timberlands $ 17,500 $ 17,232 $ 15,120 Wood Products 37,232 27,341 10,723 Real Estate 8 8,053 5,987 87 62,785 50,560 25,930 Corporate 1,317 1,747 2,132 Total capital expenditures $ 64,102 $ 52,307 $ 28,062 1 Intersegment revenues represent logs sold by our Timberlands segment to our Wood Products segment. 2 Bond discounts and deferred loan fees are reported within interest expense on the Consolidated Statements of Income 3 The effect of costs of goods sold for fair value adjustments to the carrying amounts of inventory acquired in business combinations. See Note 2: Merger with Deltic. 4 For integration and restructuring costs related to the merger with Deltic see Note 2: Merger with Deltic. 5 We do not report rural real estate separate from Timberlands as we do not report these assets separately to management. 6 Real Estate assets primarily consist of real estate development acquired with the Deltic merger. 7 Does not include the acquisition of timber and timberlands, all of which were acquired by the Timberlands segment. 8 Real Estate capital expenditures include development expenditures of $7.3 million, $5.0 million and $0 for the year ended December 31, 2019, 2018 and 2017, respectively. All of our timberlands, wood products facilities and other assets are located within the continental United States. Geographic information regarding our revenues for the years ended December 31 is as follows: (in thousands) 2019 2018 2017 United States $ 825,105 $ 972,457 $ 676,956 Canada 128 624 481 Mexico 1,865 1,498 1,158 Total consolidated revenues $ 827,098 $ 974,579 $ 678,595 No customers represented more than 10%

Earnings per Share

Earnings per Share	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings per Share	NOTE 6. EARNINGS PER SHARE The following table reconciles the number of shares used in calculating basic and diluted earnings per share for the years ended December 31: (in thousands, except per share amounts) 2019 2018 2017 Net income $ 55,661 $ 122,880 $ 86,453 Basic weighted-average shares outstanding 67,608 60,534 40,824 Incremental shares due to: Performance shares 109 230 363 Restricted stock units 26 34 40 Stock portion of earnings and profits distribution — 1,016 — Diluted weighted-average shares outstanding 67,743 61,814 41,227 Basic net income per share $ 0.82 $ 2.03 $ 2.12 Diluted net income per share $ 0.82 $ 1.99 $ 2.10 For stock-based awards, the dilutive effect is calculated using the treasury stock method. Under this method, the dilutive effect is computed as if the awards were exercised at the beginning of the period (or at time of issuance, if later) and assumes the related proceeds were used to repurchase common stock at the average market price during the period. Related proceeds include future compensation cost associated with the stock award. At December 31, 2019, 2018 and 2017, there were 49,500, 42,000, and 250 stock-based awards, respectively, which were excluded from the calculation of earnings per share because they were anti-dilutive. Anti-dilutive stock-based awards could be dilutive in future periods. Share Issuance Related to the Deltic Merger In February 2018, we issued 22.0 million shares in connection with the Deltic merger. On August 30, 2018, the board of directors approved a special distribution of $222.0 million, or approximately $3.54 per share. The special distribution amount equaled the company’s determination of the accumulated earnings and profits of Deltic as of the merger date and was distributed in order to maintain the company’s qualification as a REIT for U.S. federal income tax purposes. The special distribution 4.8 Note 2: Merger with Deltic Share Repurchase Program On August 30, 2018, our board of directors authorized management to repurchase up to $100.0 million of common stock with no time limit set for the repurchase (the 2018 Repurchase Program). No shares were repurchased during 2018 under the 2018 Repurchase Program . During the year-ended December 31, 2019, we repurchased 686,240 shares of common stock for $ 25.2 million under the 2018 Repurchase Program. All common stock purchases were made in open-market transactions. At December 31, 2019, we had remaining authorization of $ 74.8 million for future stock repurchases under the 2018 Repurchase Program. On April 26, 2016 the Company announced that our Board of Directors authorized management to repurchase up to $60.0 million of common stock over a 24-month period. No shares were repurchased in 2018 or 2017 under this repurchase plan. We record share purchases upon trade date, as opposed to the settlement date. We retire shares upon repurchase. Any excess repurchase price over par is recorded in accumulated deficit. There were no unsettled repurchases as of December 31, 2019 and 2018. Dividend On February 14, 2020 the board of directors approved a quarterly cash dividend of $0.40 per share payable on March 31, 2020 to stockholders of record as of March 6, 2020.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2019
Inventory Disclosure [Abstract]
Inventories	NOTE 7. INVENTORIES Inventories consist of the following at December 31: (in thousands) 2019 2018 Logs $ 33,313 $ 37,303 Lumber, plywood and veneer 31,639 27,420 Materials and supplies 12,831 11,310 77,783 76,033 Less: LIFO reserve (12,002 ) (15,228 ) Total inventories $ 65,781 $ 60,805 If the last-in, first-out inventory had been carried at average cost, the values would have been higher by approximately $12.0 million, $15.2 million and $10.9 million at December 31, 2019, 2018 and 2017, respectively.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2019
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	NOTE 8. PROPERTY, PLANT AND EQUIPMENT Property, Plant and Equipment consist of the following at December 31: (in thousands) Range of useful lives 2019 2018 Land $ 7,875 $ 6,078 Buildings and improvements 10-40 years 123,342 92,326 Machinery and equipment 2-25 years 360,570 364,101 Construction in progress 6,326 10,190 498,113 472,695 Less: accumulated depreciation (211,730 ) (200,502 ) Total property, plant and equipment, net $ 286,383 $ 272,193 Depreciation charged against operating income totaled $23.9 million, $22.8 million and $8.1 million in 2019, 2018 and 2017, respectively. Capitalized interest was $0.2 million in 2019 and inconsequential in 2018 and 2017.

Timber and Timberlands

Timber and Timberlands	12 Months Ended
	Dec. 31, 2019
Timber And Timberlands [Abstract]
Timber and Timberlands	NOTE 9. TIMBER AND TIMBERLANDS Timber and Timberlands consist of the following at December 31: (in thousands) 2019 2018 Timber and timberlands $ 1,554,882 $ 1,590,997 Logging roads 83,781 81,818 Total timber and timberlands, net $ 1,638,663 $ 1,672,815 Depletion from company-owned lands totaled $41.7 million, $43.9 million and $17.0 million in 2019, 2018 and 2017, respectively. Amortization of road costs, such as bridges, culverts and gravel surfacing, totaled $3.6 million, $3.4 million and $3.2 million in 2019, 2018 and 2017, respectively. Future payments due under timber cutting contracts at December 31, 2019 were $21.8 million.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	NOTE 10. INTANGIBLE ASSETS Intangible Assets consist of the following at December 31: (in thousands) 2019 2018 Indefinite-lived intangible assets $ 10,200 $ 10,200 Long-lived intangible assets 8,398 9,300 Assets held for sale — (902 ) Accumulated amortization (1,549 ) (770 ) Long-lived intangible assets, net 6,849 7,628 Total intangible assets, net $ 17,049 $ 17,828 Amortization expense totaled $0.8 million in 2019 and 2018, and $ 0 .

Other Assets

Other Assets	12 Months Ended
	Dec. 31, 2019
Other Assets [Abstract]
Other Assets	NOTE 11. OTHER ASSETS Other Current Assets consist of the following at December 31: (in thousands) 2019 2018 Real estate held for sale $ 10,974 $ 10,322 Prepaid expenses 3,097 3,194 Tax receivables 1,341 6,659 Other receivables 4,771 2,500 Total other current assets $ 20,183 $ 22,675 Other Long-Term Assets consist of the following at December 31: (in thousands) 2019 2018 Operating leases $ 15,772 $ — Mineral rights 5,254 5,735 Investment in company owned life insurance (COLI), net 4,157 3,104 Real estate development costs 3,776 2,649 Debt issuance costs 1,846 2,405 Interest rate swaps 1,601 1,510 Restricted cash 944 2,802 Other 1,940 3,076 Total other long-term assets $ 35,290 $ 21,281

Accounts Payable and Accrued Li

Accounts Payable and Accrued Liabilities	12 Months Ended
	Dec. 31, 2019
Accounts Payable And Accrued Liabilities Current And Noncurrent [Abstract]
Accounts Payable and Accrued Liabilities	NOTE 12. ACCOUNTS PAYABLE AND ACCRUED LIABILITIES Accounts Payable and Accrued Liabilities consist of the following at December 31: (in thousands) 2019 2018 Accrued payroll and benefits $ 12,920 $ 20,130 Accounts payable 12,734 12,073 Accrued interest 6,946 8,642 Accrued taxes 6,638 7,389 Deferred revenue 5,514 4,282 Operating lease liabilities 4,998 — Other current liabilities 10,827 8,477 Total accounts payable and accrued liabilities $ 60,577 $ 60,993

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases	NOTE 13. LEASES We adopted ASU No. 2016-02, Leases (Topic 842) Note 1: Summary of Significant Accounting Policies Balance Sheet Classification The following table provides supplemental balance sheet information related to our leases: (in thousands) Classification December 31, 2019 Assets Operating lease assets Other long-term assets $ 15,772 Finance lease assets 1 Property, plant and equipment, net 2,360 Total lease assets $ 18,132 Liabilities Current Operating lease liabilities Accounts payable and accrued liabilities $ 4,998 Finance lease liabilities Accounts payable and accrued liabilities 644 Noncurrent Operating lease liabilities Other long-term obligations 10,775 Finance lease liabilities Other long-term obligations 1,703 Total lease liabilities $ 18,120 1 Finance lease assets are presented net of accumulated amortization of $0.3 million as of December 31, 2019. December 31, 2019 Weighted-average remaining terms (years) Operating leases 4.22 Finance leases 3.83 Weighted-average discount rate Operating leases 4.17 % Finance leases 3.54 % Lease Costs The following table summarizes the components of our lease expense: Year Ended December 31, (in thousands) 2019 2018 2017 Operating lease costs 1 $ 5,938 $ 4,989 $ 4,519 Finance lease costs Amortization of leased assets 269 — — Interest on lease assets 40 — — Net lease costs $ 6,247 $ 4,989 $ 4,519 1 Excludes short-term leases and variable lease costs, which are immaterial. Operating lease costs and amortization of finance lease assets are included within costs of goods sold and selling, general and administrative expenses and interest on leased assets is included in interest expense, net on our Consolidated Statements of Income . Other Lease Information The below table presents supplemental cash flow information related to leases: Year Ended (in thousands) December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 5,963 Operating cash flows for finance leases $ 40 Financing cash flows for finance leases $ 283 Leased assets exchanged for new lease liabilities: Operating leases $ 7,135 Finance leases $ 2,630 Maturity of Lease Liabilities At December 31, 2019, the future minimum lease payment obligations under noncancelable leases were as follows: (in thousands) Operating Leases Finance Leases 2020 $ 5,549 $ 716 2021 4,454 696 2022 2,756 611 2023 1,821 358 2024 965 128 After 2024 1,689 — Total lease payments 17,234 2,509 Less: interest 1,461 162 Present value of lease liabilities $ 15,773 $ 2,347

Debt

Debt	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Debt	NOTE 14. DEBT Long-term debt consists of the following at December 31: (in thousands) 2019 2018 Variable rate term loans 1 $ 397,500 $ 247,500 Fixed rate term loans 2 296,000 296,000 7 1/2 — 150,000 Revenue bonds 3 65,735 65,735 Medium-term notes 4 3,000 3,000 Long-term principal 762,235 762,235 Interest rate swaps — (183 ) Debt issuance costs (2,086 ) (2,143 ) Unamortized discounts (3,680 ) (4,545 ) Total long-term debt 756,469 755,364 Less current portion of long-term debt (45,974 ) (39,973 ) Long-term debt $ 710,495 $ 715,391 1 Variable rate term loans are at rates of one or three-month LIBOR plus a spread between 1.85% and 2.15% and mature between 2020 and 2029. At December 31, 2019, the one and three-month LIBOR rates were 1.69% and 2.10%, respectively. We have entered into interest rate swaps for these variable rate term loans to fix the interest rate. See N ote 15: Derivative Instruments 2 Fixed rate term loans are at rates between 3.70% and 4.64% and mature between 2022 and 2025. 3 Revenue bonds have a fixed rate of 2.75% and mature in 2024. 4 Medium term notes have a fixed rate of 8.75% and mature in 2022 . Long-term debt at December 31, 2018 excludes $29.0 million of revenue bonds classified as held for sale as part of the sale of the Deltic MDF facility as they were assumed by the buyer. See Note 3: Sale of Deltic MDF Facility TERM LOANS On March 22, 2018 we entered into a Second Amended and Restated Term Loan Agreement (Amended Term Loan Agreement), which amended the existing term loan agreement. The agreement included an additional $100.0 million of new term loans used to refinance Deltic’s $106.0 million credit facility and amended and restated a $100.0 million loan we assumed in connection with the Deltic merger to conform to the outstanding terms of the Amended Term Loan Agreement. The $100.0 million repayment of Deltic’s credit facility was funded by a $100.0 million borrowing under our revolving credit facility and subsequently refinanced with two tranches of term loans aggregating $100.0 million under the Amended Term Loan Agreement. In January 2019, through a first amendment to the Amended Term Loan Agreement, we refinanced $150.0 million of 7.5% senior notes (Senior Notes) that matured in 2019 with a $150.0 million term loan that matures in 2029. The new term loan carries a variable interest rate of one-month LIBOR plus 1.85%. We paid $0.5 million of lender fees on the new term loan. Concurrent with the new term loan, we entered into a $150.0 million interest rate swap to fix the rate at 4.56%. Upon refinancing, we redeemed and paid all outstanding Senior Notes including a redemption premium of $4.9 million which is included in the loss on extinguishment of debt in our Consolidated Statements of Income In December 2019, we refinanced an existing $40.0 million term loan that matured in December 2019 through a second amendment to the Amended Term Loan Agreement. The new term loan carries a variable interest rate of one-month LIBOR plus 1.85% and matures in 2029. In conjunction with the new term loan we entered into a $40.0 million interest rate swap to fix the rate at 3.17%. See Note: 15 Derivative Instruments At December 31, 2019 $693.5 million was outstanding under our Amended Term Loan Agreement. As of December 31, 2019, we were in compliance with all covenants under our debt agreements. DEBT ISSUANCE COSTS AND UNAMORTIZED DISCOUNTS Debt issuance costs represent the capitalized direct costs incurred related to the issuance of debt. These costs are amortized to interest expense over the terms of the respective borrowings. Unamortized discounts include a $4.9 million fair value adjustment to the $100.0 million term loan assumed in the Deltic merger. The unamortized balance of the fair value adjustment at December 31, 2019, was $3.7 million and will be amortized through the term loan’s maturity in 2025. DEBT MATURITIES Scheduled principal payments due on long-term debt at December 31, 2019 are as follows: (in thousands) 2020 $ 46,000 2021 40,000 2022 43,000 2023 40,000 2024 175,735 Thereafter 417,500 Total $ 762,235 CREDIT AGREEMENT On February 14, 2018, we entered into a Second Amended and Restated Credit Agreement (Amended Credit Agreement) with an expiration date of April 13, 2023. The Amended Credit Agreement increased our revolving line of credit to $380.0 million, which may be increased by up to an additional $420.0 million. It also includes a sublimit of $75.0 million for the issuance of standby letters of credit and a sublimit of $25.0 million for swing line loans. Usage under either or both subfacilities reduces availability under the revolving line of credit. We may also utilize borrowings under the Amended Credit Agreement to, among other things, refinance existing indebtedness and provide funding for working capital requirements, capital projects, acquisitions and other general corporate expenditures. Pricing is set according to the type of borrowing. LIBOR Loans are issued at a rate equal to the LIBOR Rate, while Base Rate Loans are issued at a rate equal to a Base Rate, which is a fluctuating rate per annum equal to the highest of (a) the Federal Funds Rate plus one half The Amended Credit Agreement contains certain covenants that limit our ability and that of our subsidiaries to create liens, merge or consolidate, dispose of assets, incur indebtedness and guarantees, repurchase or redeem capital stock and indebtedness, make certain investments or acquisitions, enter into certain transactions with affiliates or change the nature of our business. The Amended Credit Agreement also contains financial maintenance covenants including the maintenance of a minimum interest coverage ratio and a maximum leverage ratio consistent with the Amended Term Loan Agreement. We are permitted to pay dividends to our stockholders under the terms of the Amended Credit Agreement so long as we expect to remain in compliance with the financial maintenance covenants. At December 31, 2019, we were in compliance with all covenants under our credit agreements, there were no borrowings under the revolving line of credit and approximately $1.0 million of the credit facility was utilized by outstanding letters of credit.

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2019
Derivative Instrument Detail [Abstract]
Derivative Instruments	NOTE 15. DERIVATIVE INSTRUMENTS From time to time, we enter into derivative financial instruments to manage certain cash flow and fair value risks. Derivatives designated and qualifying as a hedge of the exposure to variability in the cash flows of a specific asset or liability that is attributable to a particular risk, such as interest rate risk, are considered cash flow hedges. As of December 31, 2019, we have six interest rate swaps associated with $397.5 million of term loan debt. These cash flow hedges convert variable rates ranging from one-month and three-month LIBOR plus 1.85% to 2.15%, to fixed rates ranging from 3.17% to 4.82%. Our cash flow hedges are expected to be highly effective in achieving the offsetting of cash flows attributable to the hedged interest rate risk through the term of the hedge. At December 31, 2019, the amount of net losses expected to be reclassified into earnings in the next 12 months is approximately $3.7 million. In January 2019, we entered into a $150.0 million interest rate swap associated with the new term loan that refinanced our Senior Notes. This cash flow hedge converted a variable rate of one-month LIBOR plus 1.85% to a fixed rate of 4.56%. In September 2019, we entered into a $40.0 million interest rate swap, with the objective to lock in the index component rate on an expected new term loan in December 2019. In December 2019, we refinanced an existing $40.0 million term loan that matured with a new term loan maturing December 2029. Upon completing the refinance of the term loan, the interest rate swap was re-designated under new terms consistent with the new term loan. This cash flow hedge converts a variable rate of one-month LIBOR plus 1.85% to a fixed rate of 3.17%. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset or liability to a particular risk, such as interest rate risk, are considered fair value hedges. Fair value interest rate swaps with notional amounts totaling $14.3 million matured during the first quarter of 2018. A $50.0 million notional fair value swap associated with the Senior Notes was terminated in December 2017 at a cost of $0.4 million. The termination cost was recorded as a reduction to the carrying value of our long-term debt. The remaining unamortized balance was expensed in 2019 upon redemption of the Senior Notes. As of December 31, 2019, we do not hold any derivatives designated or qualifying as fair value hedges. Derivatives not designated as hedges are not speculative and are used to manage our exposure to interest rate movements, commodity price movements or other identified risks, but do not meet the strict hedge accounting requirements. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly into income. In April 2017, we entered into a lumber price swap to fix the price on a total of 36 million board feet (MMBF) of southern yellow pine. The lumber price swap expired on December 31, 2017, resulting in a realized gain of $1.1 million for the year then ended. The fair values of our cash flow derivative instruments on our Consolidated Balance Sheets Asset Derivatives Liability Derivatives (in thousands) Location 2019 2018 Location 2019 2018 Derivatives designated in cash flow hedging relationships: Interest rate contracts Other assets, non-current $ 1,601 $ 1,510 Other long-term obligations $ 22,398 $ 2,888 The following table details the effect of derivatives on our Consolidated Statements of Income Year Ended December 31, (in thousands) Location 2019 2018 2017 Derivatives designated in fair value hedging relationships: Interest rate contracts Realized gain (loss) on interest rate contracts 1 Interest expense $ — $ (191 ) $ 413 Loss on hedged debt basis adjustment included in debt extinguishment (165 ) — — $ (165 ) $ (191 ) $ 413 Derivatives designated in cash flow hedging relationships: Interest rate contracts Loss recognized in other comprehensive income, net of tax $ (19,824 ) $ (3,062 ) $ (145 ) Loss reclassified from accumulated other comprehensive loss 1 Interest expense $ (1,384 ) $ (647 ) $ (149 ) Derivatives not designated as hedging instruments: Lumber price contracts Realized gain on lumber price swap Gain on lumber price swap $ — $ — $ 1,088 Interest expense, net $ 30,361 $ 35,227 $ 27,049 1 Consolidated Statements of Cash Flows

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2019
Derivative Instrument Detail [Abstract]
Fair Value Measurements	NOTE 16. FAIR VALUE MEASUREMENTS A framework has been established for measuring fair value, which provides a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The three levels of the fair value hierarchy are as follows: • Level 1 inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets. • Level 2 inputs to the valuation methodology include: • quoted prices for similar assets or liabilities in active markets; • quoted prices for identical or similar assets or liabilities in inactive markets; • inputs other than quoted prices that are observable for the asset or liability; and • inputs that are derived principally from or corroborated by observable market data by correlation or other means. • Level 3 inputs to the valuation methodology are unobservable and significant to the fair value measurement. If the asset or liability has a specified (contractual) term, the Level 2 input must correspond to substantially the full term of the asset or liability. The fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used need to maximize the use of observable inputs and minimize the use of unobservable inputs. • For cash, cash-equivalents and restricted cash, the carrying amount approximates fair value due to the short-term nature of these financial instruments. • The fair value of the interest rate swaps was determined using discounted cash flow analysis on the expected cash flows of each derivative. The analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate forward curves. • The fair value of our long-term debt is estimated based upon the quoted market prices for the same or similar debt issues or estimated based on average market prices for comparable debt when there is no quoted market price. • The cash surrender value of our company owned life insurance, the amount at which it could be redeemed, is used to estimate fair value because market prices are not readily available. Carrying amounts and estimated fair values of our financial instruments as of December 31 are as follows: 2019 2018 (in thousands) Carrying Amount Fair Value Carrying Amount Fair Value Cash, cash equivalents and restricted cash (Level 1) $ 84,254 $ 84,254 $ 79,441 $ 79,441 Derivative assets related to interest rate swaps (Level 2) $ 1,601 $ 1,601 $ 1,510 $ 1,510 Derivative liabilities related to interest rate swaps (Level 2) $ (22,398 ) $ (22,398 ) $ (2,888 ) $ (2,888 ) Long-term debt, including current portion (Level 2): Term loans $ (689,820 ) $ (703,437 ) $ (539,169 ) $ (539,037 ) Senior notes — — (149,786 ) (154,328 ) Revenue bonds (65,735 ) (68,200 ) (94,735 ) (93,144 ) Medium-term notes (3,000 ) (3,480 ) (3,000 ) (3,419 ) Total long-term debt 1 $ (758,555 ) $ (775,117 ) $ (786,690 ) $ (789,928 ) Company owned life insurance (Level 3) $ 4,157 $ 4,157 $ 3,104 $ 3,104 1 The carrying amount of long-term debt includes principal and unamortized discounts. At December 31, 2018, long-term debt in the above table included the $29.0 million of revenue bonds for the MDF facility which was classified as held for sale. See Note 3: Sale of Deltic MDF Facility

Equity-Based Compensation Plans

Equity-Based Compensation Plans	12 Months Ended
	Dec. 31, 2019
Share Based Compensation [Abstract]
Equity-Based Compensation Plans	NOTE 17. EQUITY-BASED COMPENSATION PLANS On May 6, 2019 (the Effective Date) the stockholders approved our 2019 Long-Term Incentive Plan (the 2019 Plan). The total amount of PotlatchDeltic common stock authorized for issuance under the 2019 Plan includes, in addition to 1.2 million new shares approved by our stockholders: (i) the total number of shares available for future awards under the Potlatch Corporation 2014 Long-Term Incentive Plan and its predecessor plans (the Prior Plans) as of the Effective Date and (ii) the number of undelivered shares subject to outstanding awards under the Prior Plans that will become available for future issuance as provided for under the 2019 Plan. We issue new shares of common stock to settle performance stock awards (PSAs), restricted stock units (RSUs) and deferred compensation stock equivalent units. We estimate forfeitures each period. At December 31, 2019, approximately 1.4 million shares were authorized for future use under our long-term incentive plans. The following table details our compensation expense and the related income tax benefit for the years ended December 31: (in thousands) 2019 2018 2017 Employee equity-based compensation expense: Performance stock awards $ 4,605 $ 4,157 $ 3,582 Restricted stock units 2,595 2,024 1,140 Deferred compensation stock equivalent units expense 72 213 657 Accelerated share-based termination benefits in connection with the merger — 1,812 — Total equity-based compensation expense $ 7,272 $ 8,206 $ 5,379 Total tax benefit recognized for shared-based payment awards $ 314 $ 332 $ 379 PERFORMANCE STOCK AWARDS PSAs granted under the stock incentive plans have a three-year three-year three-year Since the awards contain a market condition, the effect of the market condition is reflected in the grant-date fair value, which is estimated using a Monte Carlo simulation. This method is used to estimate the stock prices of PotlatchDeltic and the selected peer companies at the end of the three-year performance period. The Monte Carlo simulation uses inputs such as stock prices and expected volatility of PotlatchDeltic and the peer group of companies as of the award date. Multiple simulations are generated, resulting in share prices and total shareholder return values for PotlatchDeltic and the peer group of companies. For each simulation, the total shareholder return of PotlatchDeltic is ranked against that of the peer group of companies. The future value of the performance share unit is calculated based on a multiplier for the median outperformance and percentile ranking and then discounted to present value. The discount rate is the risk-free rate as of the award date for a term consistent with the performance period. Awards are also credited with dividend equivalents at the end of the performance period, and as a result, award values are not adjusted for dividends. The following table presents the key inputs used in calculating the fair value of the PSAs and the resulting fair values: Year Ended December 31, 2019 2018 2017 Stock price as of valuation date $ 35.01 $ 54.00 $ 43.60 Risk-free rate 2.47 % 2.46 % 1.61 % Expected volatility 25.15 % 23.74 % 24.22 % Expected dividend yield 1 — 2.96 % 3.44 % Expected term (years) 3.00 3.00 3.00 Fair value of a performance share $ 37.87 $ 75.37 $ 53.85 1 The following table summarizes outstanding PSAs as of December 31 and the changes during each year: 2019 2018 2017 (in thousands, except per share amounts) Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Nonvested shares outstanding at January 1 142,238 $ 63.91 200,631 $ 39.19 203,788 $ 32.59 Granted 142,066 $ 37.87 67,747 $ 75.37 78,033 $ 53.85 Vested (75,048 ) $ 53.85 (121,058 ) $ 30.02 (78,129 ) $ 36.71 Forfeited (13,249 ) $ 45.35 (5,082 ) $ 47.90 (3,061 ) $ 34.68 Nonvested shares outstanding at December 31 196,007 $ 50.15 142,238 $ 63.91 200,631 $ 39.19 Total grant date fair value of PSAs vested during the year $ 4,041 $ 3,634 $ 2,868 Total fair value of PSAs vested during the year $ 3,561 $ 6,397 $ 7,797 Aggregate intrinsic value of nonvested PSAs at December 31 $ 8,481 $ 4,500 $ 10,011 As of December 31, 2019, there was $5.1 million of unrecognized compensation cost related to nonvested PSAs, which is expected to be recognized over a weighted average period of 1.7 years. RESTRICTED STOCK UNITS During 2019, 2018 and 2017, certain directors, officers, and other employees of the company were granted RSU awards that will accrue dividend equivalents based on dividends paid during the RSU vesting period. The dividend equivalents will be converted into additional RSUs that will vest in the same manner as the underlying RSUs to which they relate. Therefore, the shares are not considered participating securities. The terms of the awards state that the RSUs will vest in a given time period of one to three years. The following table summarizes outstanding RSU awards as of December 31 and the changes during each year: 2019 2018 2017 (in thousands, except per share amounts) Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Nonvested shares outstanding at January 1 72,020 $ 47.66 67,871 $ 32.87 71,420 $ 31.61 Granted 104,488 $ 36.80 49,193 $ 49.96 26,507 $ 43.64 Vested (43,102 ) $ 45.51 (41,350 ) $ 26.33 (29,039 ) $ 39.65 Forfeited (5,935 ) $ 40.26 (3,694 ) $ 45.36 (1,017 ) $ 31.63 Nonvested shares outstanding at December 31 127,471 $ 39.83 72,020 $ 47.66 67,871 $ 32.87 Total grant date fair value of RSU awards vested during the year $ 1,961 $ 1,089 $ 1,151 Total fair value of RSU awards vested during the year $ 1,771 $ 1,328 $ 1,442 Aggregate intrinsic value of nonvested RSU awards at December 31 $ 5,516 $ 2,279 $ 3,387 As of December 31, 2019, there was $3.0 million of total unrecognized compensation cost related to nonvested RSU awards, which is expected to be recognized over a weighted average period of 1.6 years. DEFERRED COMPENSATION STOCK EQUIVALENT UNITS A long-term incentive award was granted annually to our directors through December 2017. The awards are payable upon a director's separation from service. Directors may also elect to defer their annual retainers, payable in the form of stock. All stock unit equivalent accounts are credited with dividend equivalents. As of December 31, 2019, there were 151,856 shares outstanding that will be distributed in the future to directors as common stock. Issuance of restricted stock units awarded to certain directors, officers and employees may also be deferred. All stock unit equivalent accounts are credited with dividend equivalents. At December 31, 2019, there were 86,149 vested RSUs where issuance of the related stock had been deferred. REPLACEMENT RESTRICTED STOCK UNIT AWARDS T he replacement RSUs issued as a result of the merger with Deltic and subject to post-merger services have four-year Note 2: Deltic Merger . There were no qualifying terminations during 2019 .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 18. INCOME TAXES As a REIT, we generally are not subject to federal and state corporate income taxes on income from investments in real estate that we distribute to our shareholders. We conduct certain activities through our PotlatchDeltic TRS which are subject to corporate level federal and state income taxes. These activities are principally comprised of our wood products manufacturing operations and certain real estate investments. Therefore, income tax expense or benefit is primarily due to income or loss of the PotlatchDeltic TRS, as well as permanent book versus tax differences. We are also subject to corporate taxes on built-in gains (the excess of fair market value over tax basis on the merger date) on sales of former Deltic real property held by the REIT during the five years following the Deltic merger. The sale of standing timber is not subject to built-in gains tax. During the year-ended December 31, 2019 we had carryover tax basis in the MDF facility from the Deltic merger that was sold in February 2019 and as a result, we recorded a reduction to deferred tax liabilities and increase to income taxes payable of $15.8 million at the date of sale. See Note 3: Sale of Deltic MDF Facility On December 22, 2017, H.R. 1, Tax Cuts and Jobs Act (the Act) was enacted. The Act contained significant changes to corporate taxation, including the reduction of the corporate tax rate from 35% to 21% effective January 1, 2018. The tax rate reduction required a remeasurement of our deferred tax assets and liabilities as of the date of enactment. Accordingly, net deferred tax assets, including the related valuation allowance, were reduced by $10.5 million and the change was recorded as an increase to the 2017 tax provision. In addition, during 2018 we recorded a net tax benefit of $5.0 million primarily related to deducting contributions to our qualified pension plans on our 2017 federal tax returns at the higher 2017 income tax rate. Income tax expense consists of the following for the years ended December 31: (in thousands) 2019 2018 2017 Current $ 12,055 $ 7,038 $ 16,657 Deferred (11,082 ) 11,370 14,325 Net operating loss carryforwards 37 791 1,039 Income tax provision $ 1,010 $ 19,199 $ 32,021 Income tax expense differs from the amount computed by applying the statutory federal income tax rate of 21% for 2019 and 2018 and 35% for 2017 to income before income taxes due to the following for the years ended December 31: (in thousands) 2019 2018 2017 U.S. federal statutory income tax $ 11,901 $ 29,837 $ 41,466 REIT income not subject to federal income tax (11,285 ) (8,773 ) (20,651 ) U.S. tax rate change on deferred tax assets and liabilities — — 10,528 Pension contribution deducted at higher tax rate — (5,665 ) — Change in valuation allowance (395 ) — 140 State income taxes, net of federal income tax 903 3,712 2,608 Domestic production activities deduction — — (1,511 ) Permanent book-tax differences (793 ) (771 ) (252 ) Research and development credits — — (294 ) Other items, net 679 859 (13 ) Income tax provision $ 1,010 $ 19,199 $ 32,021 Effective tax rate 1.8 % 13.5 % 27.0 % The tax effects of significant temporary differences creating deferred tax assets and liabilities at December 31 were: (in thousands) 2019 2018 Deferred tax assets: Pension and other postretirement employee benefits $ 32,110 $ 30,523 Inventories 754 601 Tax credits 2,190 2,688 Nondeductible accruals 815 1,039 Incentive compensation 1,044 1,000 Employee benefits 1,316 1,452 Other 1,296 320 Total deferred tax assets 39,525 37,623 Valuation allowance (395 ) (790 ) Deferred tax assets, net of valuation allowance 39,130 36,833 Deferred tax liabilities: Timber and timberlands, net (965 ) (1,025 ) Property, plant and equipment, net (50,901 ) (58,909 ) Intangible assets, net (3,778 ) (4,134 ) Real estate development (1,402 ) (2,035 ) Other (2,249 ) (2,739 ) Total deferred tax liabilities (59,295 ) (68,842 ) Deferred tax liabilities, net $ (20,165 ) $ (32,009 ) As of December 31, 2019, we had no state or federal net operating loss carryforwards. We have Idaho Investment Tax Credits of $2.8 million that expire from 2022 through 2033. We use the flow-through method of accounting for investment tax credits. With the exception of the $0.4 million valuation allowance related to certain Idaho Investment Tax Credit carryforwards we expect will expire prior to realization, we believe it is more likely than not that we will have sufficient future taxable income to realize our deferred tax assets. The following table summarizes the tax years subject to examination by major taxing jurisdictions: Jurisdiction Years Federal 2016 — 2019 Arkansas 2016 — 2019 Idaho 2016 — 2019 Michigan 2015 — 2019 Minnesota 2015 — 2019 As of December 31, 2019, we had no A reconciliation of the beginning and ending unrecognized tax benefits is as follows: (in thousands) 2019 2018 Balance at January 1 $ 564 $ 564 Additions for tax positions of prior years — — Reduction for tax positions of prior years (564 ) — Balance at December 31 $ — $ 564 We reflect accrued interest related to tax obligations, as well as penalties, in our provision for income taxes. For the years ended December 31, 2019, 2018 and 2017, we recognized insignificant amounts related to interest and penalties in our tax provision. At December 31, 2019, 2018 and 2017, we had insignificant amounts of accrued interest related to tax obligations and no accrued interest receivable with respect to open tax refunds.

Savings Plans, Pension Plans an

Savings Plans, Pension Plans and Other Postretirement Employee Benefits	12 Months Ended
	Dec. 31, 2019
General Discussion Of Pension And Other Postretirement Benefits [Abstract]
Savings Plans, Pension Plans and Other Postretirement Employee Benefits	NOTE 19. SAVINGS PLANS, PENSION PLANS AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS SAVINGS PLANS Substantially all of our employees are eligible to participate in 401(k) savings plans. In 2019, 2018 and 2017, we made matching 401(k) contributions on behalf of our employees of $3.9 million, $3.7 million and $2.4 million, respectively. Certain eligible employees who earn awards under our annual incentive plan are permitted to defer receipt of those awards. These employees may defer receipt of a minimum of 50% and a maximum of 100% of the award pursuant to rules established under our Management Deferred Compensation Plan. Eligible employees may also defer up to 50% of their base salary under the Management Deferred Compensation Plan. At the employee's election, deferrals may be deemed invested in a company stock unit account, a directed investment account with certain deemed investments available under the 401(k) Plan or a combination of these investment vehicles. If company stock units are elected, dividend equivalents are credited to the units . Upon our merger with Deltic, we assumed three defined 401(k) savings plans. Effective January 1, 2019, these plans were merged with our legacy Potlatch 401(k) savings plans. PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS On January 1, 2011, we froze the legacy Potlatch pension plans to any new salaried and hourly non-represented employees hired after that date. Effective January 1, 2010, we restructured our other postretirement benefit plans (OPEB). The level of health care subsidy was frozen for retirees so that all future increments in health care costs will be borne by the retirees. In addition, for retirees under age 65, a high deductible medical plan was created and all other existing health care plans were terminated. For retirees age 65 or over, the medical plan is divided into two components, with the company continuing to self-insure prescription drugs and providing a fully-insured medical supplemental plan through AARP/United Healthcare. Both health care plans require the retiree to contribute amounts in excess of the company subsidy in order to continue coverage. The Plan does not pay for vision, dental and life insurance for the retirees . The effect of these retiree plan changes was a reduction in the accumulated postretirement benefit obligation of $ 76.7 million, which was recognized in Accumulated Other Comprehensive Loss as of December 31, 2009 and was fully amortized as of December 31, 2019 . We use a December 31 measurement date for our benefit plans and obligations. We recognize the underfunded status of our defined benefit pension plans and OPEB obligations on our Consolidated Balance Sheets Consolidated Statements of Income Upon merger with Deltic in 2018, we assumed one qualified pension plan, one nonqualified pension plan and a postretirement plan. The acquired plans have been frozen to new participants since 2014. Consistent with accounting for the merger as the acquirer in a business combination, pension assets acquired, and benefit obligations assumed were remeasured to reflect their funded status at the date of acquisition. This included updating asset values and discount rates to reflect market conditions at the merger date. The fair value of these items at the date of merger are listed in the table below as “plan acquisitions.” The change in benefit obligation, change in plan assets and funded status for company-sponsored benefit plans and obligations are as follows: Pension Plans OPEB (in thousands) 2019 2018 2019 2018 Benefit obligation at beginning of year $ (427,909 ) $ (392,371 ) $ (40,032 ) $ (30,349 ) Service cost (7,767 ) (8,454 ) (371 ) (341 ) Interest cost (18,465 ) (16,992 ) (1,588 ) (1,482 ) Actuarial (loss) gain (53,446 ) 20,445 (7,997 ) 2,100 Benefits paid 33,350 31,530 3,593 3,582 Plan acquisitions — (62,067 ) — (13,542 ) Benefit obligation at end of year $ (474,237 ) $ (427,909 ) $ (46,395 ) $ (40,032 ) Fair value of plan assets at beginning of year $ 351,285 $ 313,862 $ — $ — Actual return (loss) on plan assets 78,448 (23,745 ) — — Employer contributions and benefit payments 2,085 53,998 3,593 3,582 Benefits paid (33,350 ) (31,530 ) (3,593 ) (3,582 ) Plan acquisitions — 38,700 — — Fair value of plan assets at end of year $ 398,468 $ 351,285 $ — $ — Amounts recognized in the consolidated balance sheets: Current liabilities $ (2,152 ) $ (2,121 ) $ (4,549 ) $ (3,876 ) Noncurrent liabilities (73,617 ) (74,503 ) (41,846 ) (36,156 ) Funded status $ (75,769 ) $ (76,624 ) $ (46,395 ) $ (40,032 ) The accumulated benefit obligation for all defined benefit pension plans is determined using the actuarial present value of the vested benefits to which the employee is currently entitled and the employee’s expected date of separation for retirement and was $458.1 million and $417.4 million at December 31, 2019 and 2018, respectively. During 2019 and 2018, funding of pension and other postretirement employee benefit plans was $5.7 million and $57.6 million, respectively. Our 2018 funding included a $44.0 million voluntary contribution allowing us to deduct the amount on our 2017 income tax return at higher tax rates. PENSION ASSETS We utilize formal investment policy guidelines for our company-sponsored pension plan assets. Management is responsible for ensuring the investment policy and guidelines are adhered to and the investment objectives are met. The general policy states that plan assets will be invested to seek the greatest return consistent with the fiduciary character of the pension funds and to allow the plans to meet the need for timely pension benefit payments. The specific investment guidelines stipulate that management will maintain adequate liquidity for meeting expected benefit payments by reviewing, on a timely basis, contribution and benefit payment levels and appropriately revise long-term and short-term asset allocations. Management takes reasonable and prudent steps to preserve the value of pension fund assets and to avoid the risk of large losses. Major steps taken to provide this protection include the following: • Assets are diversified among various asset classes, such as global equities, fixed income, alternatives and liquid reserves. The long-term asset allocation ranges are as follows: Global equities 26% - 38% Fixed income securities 44% - 64% Alternatives, which may include equities and fixed income securities 10% - 16% Cash and cash equivalents 0% - 5% • Periodic reviews of allocations within these ranges are made to determine what adjustments should be made based on changing economic and market conditions and specific liquidity requirements. • Assets are managed by professional investment managers and may be invested in separately managed accounts or commingled funds. • Assets are not invested in PotlatchDeltic stock. The investment guidelines also provide that the individual investment managers are expected to achieve a reasonable rate of return over a market cycle. Emphasis will be placed on long-term performance versus short-term market aberrations. Factors to be considered in determining reasonable rates of return include performance achieved by a diverse cross section of other investment managers, performance of commonly used benchmarks (e.g., MSCI All-Country World Index, Barclays Long Credit Index), actuarial assumptions for return on plan investments and specific performance guidelines given to individual investment managers. The asset allocations of the pension benefit plans’ assets at December 31 by asset category are as follows: Pension Plans Asset Category 2019 2018 Global equities 32 % 30 % Fixed income securities 54 58 Other (includes cash and cash equivalents and alternatives) 14 12 Total 100 % 100 % The pension assets are stated at fair value. Refer to Note 14: Fair Value Measurements Following is a description of the valuation methodologies used for pension assets measured at fair value: • Level 1 assets include cash and cash equivalents, corporate common and preferred stocks with quoted market prices on major securities markets, and investments in registered investment company funds for which market quotations are generally readily available on the primary market or exchange on which they are traded. • Level 2 assets at December 31, 2019 consist of thinly traded fixed income instruments of varying maturities representing corporate security investments. Level 2 assets at December 31, 2018 consist of collective investment trust funds, which are valued at their respective net asset value (NAV) and fully redeemable in the near-term. The NAV fair value practical expedient was not used as these investments have readily determinable fair value. • Investments in funds that may not be fully redeemed in the near-term are generally classified in Level 3. We had no Level 3 investments at December 31, 2019 or 2018. Fair value measurements are as follows: (in thousands) December 31, 2019 Asset Category Level 1 Level 2 Total Cash and cash equivalents $ 6,671 $ — $ 6,671 Global equity securities 1 127,688 — 127,688 Fixed income securities 5 173,464 40,554 214,018 Alternatives 6 50,091 — 50,091 Total $ 357,914 $ 40,554 $ 398,468 (in thousands) December 31, 2018 Asset Category Level 1 Level 2 Total Cash and cash equivalents $ 4,120 $ — $ 4,120 Domestic equity securities 2 31,315 23,384 54,699 International equity securities 3 — 21,848 21,848 Emerging markets 4 6,909 21,225 28,134 Fixed income securities 5 204,072 — 204,072 Alternatives 6 — 38,412 38,412 Total $ 246,416 $ 104,869 $ 351,285 1 2 Level 1 assets are managed investments in the U.S., small/mid-cap equities that track the Russell 2500 Growth index or Russell 2500 Value index. Level 2 assets are collective investments, which are invested in U.S. large-cap equities that track the S&P 500. 3 Level 2 assets are collective investments in equity funds of developed markets outside of the United States and Canada that track the MSCI EAFE Value index or MSCI EAFE Growth index. 4 Level 1 assets are mutual funds which are invested in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index. Level 2 assets are collective investments in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index. 5 Level 1 assets are investments in a diversified portfolio of fixed income instruments of varying maturities representing corporates, U.S. treasuries, municipals and futures. Level 2 assets are thinly traded investments in a diversified portfolio of fixed income instruments of varying maturities representing mostly corporates securities. Both Level 1 & Level 2 investments track the Bloomberg Barclay’s Long-term Credit Index. 6 Level 1 assets are long-term investment funds which are invested in tangible assets and real asset companies such as, infrastructure, natural resources and timber. Level 2 assets are collective investments in inflation-indexed bonds, securities of real estate companies, commodity index-linked notes, fixed income securities, foreign currencies, securities of natural resource companies, master limited partnerships, publicly listed infrastructure companies, floating-rate debt, securities of global agriculture companies and securities of global timber companies. PLAN ACTIVITY Pre-tax components of net periodic cost (benefit) recognized in our Consolidated Statements of Income Pension Plans OPEB (in thousands) 2019 2018 2017 2019 2018 2017 Service cost $ 7,767 $ 8,454 $ 6,753 $ 371 $ 341 $ 14 Interest cost 18,465 16,992 16,096 1,588 1,482 1,262 Expected return on plan assets (22,190 ) (20,035 ) (18,406 ) — — — Amortization of prior service cost (credit) 211 186 288 (8,844 ) (8,877 ) (8,877 ) Amortization of actuarial loss 13,497 16,589 14,484 1,012 1,311 1,537 Net periodic cost (benefit) $ 17,750 $ 22,186 $ 19,215 $ (5,873 ) $ (5,743 ) $ (6,064 ) The amounts recorded in Accumulated Other Comprehensive Loss Consolidated Balance Sheets Pension Plans OPEB (in thousands) 2019 2018 2019 2018 Net loss $ 116,780 $ 128,849 $ 12,437 $ 7,269 Prior service cost (credit) 248 404 (2,106 ) (8,651 ) Net amount recognized $ 117,028 $ 129,253 $ 10,331 $ (1,382 ) The estimated net loss and prior service cost for the defined benefit pension plans that will be amortized from accumulated other comprehensive loss into net periodic benefit cost over the next year are $17.0 million and $0.1 million, respectively. The estimated net loss and prior service credit for OPEB obligations that will be amortized from accumulated other comprehensive loss into net periodic benefit over the next year are $1.7 million and $1.3 million, respectively. EXPECTED FUNDING AND BENEFIT PAYMENTS We are required to contribute $4.4 million to our qualified pension plans in 2020. Our non-qualified pension plan and other postretirement employee benefit plans are unfunded and benefit payments are paid from our general assets. We estimate that we will make non-qualified pension plan payments of $2.2 million and other postretirement employee benefit payments of $4.5 million in 2020, which are included below. Estimated future benefit payments, which reflect expected future service are as follows for the years indicated: (in thousands) Pension Plans OPEB 2020 $ 30,769 $ 4,548 2021 $ 30,756 $ 3,780 2022 $ 30,689 $ 3,595 2023 $ 30,589 $ 3,402 2024 $ 30,232 $ 3,148 2025–2029 $ 143,237 $ 12,966 ACTUARIAL ASSUMPTIONS The weighted average assumptions used to determine the benefit obligation for non-Deltic plans as of December 31 were: Pension Plans OPEB 2019 2018 2019 2018 Discount rate 3.40 % 4.40 % 3.40 % 4.40 % Rate of salaried compensation increase 3.00 % 3.00 % — — The weighted average assumptions used for non-Deltic plans to determine the net periodic cost (benefit) for the years ended December 31 were: Pension Plans OPEB 2019 2018 2017 2019 2018 2017 Discount rate 4.40 % 3.85 % 4.40 % 4.40 % 3.65 % 4.10 % Expected return on plan assets 6.25 % 6.25 % 6.50 % — — — Rate of salaried compensation increase 3.00 % 3.00 % 3.00 % — — — The weighted average assumptions used to determine the benefit obligation for Deltic plans as of December 31 were: Pension Plans OPEB 2019 2018 2019 2018 Discount rate 3.40 % 4.40 % 3.40 % 4.40 % Rate of salaried compensation increase 4.00 % 4.00 % — — The weighted average assumptions used for Deltic plans to determine the net periodic cost (benefit) for the years ended December 31 were: Pension Plans OPEB 2019 2018 2019 2018 Discount rate 4.40 % 4.30 % 4.40 % 4.30 % Expected return on plan assets 6.25 % 6.25 % — — Rate of salaried compensation increase 4.00 % 4.00 % — — The discount rate used in the determination of pension and other postretirement employee benefit obligations was calculated using hypothetical bond portfolios to match the expected benefit payments under each of our pension plans and other postretirement employee benefit obligations based on bonds available at each year end with a rating of "AA" or better. The portfolios were well-diversified over corporate industrial, corporate financial, municipal, federal and foreign government issuers. The expected return on plan assets assumption is based upon an analysis of historical long-term returns for various investment categories, as measured by appropriate indices. These indices are weighted based upon the extent to which plan assets are invested in the particular categories in arriving at our determination of a composite expected return. The expected rate of return assumption on all plans that will be used to determine net periodic cost for 2020 is 5.75%. A decrease in the discount rate or the rate of expected return on plan assets, all other assumptions remaining the same, would increase net periodic cost. A 25 basis point decrease in the pension discount rate would increase net periodic cost by approximately $1.1 million in 2019 and increase the projected benefit obligation by approximately $13.6 million as of December 31, 2019. A 25 basis point decrease in the assumption for the expected return on plan assets would increase net periodic cost by approximately $0.9 million in 2019. The actual rates of return on plan assets may, and do, vary significantly from the assumption used. A 25 basis point decrease in the OPEB discount rate would be de minimis to the annual net periodic cost. The assumed health care cost trend rate used to calculate other postretirement employee benefit obligations for non-Deltic plans and Deltic plans as of December 31, 2019 was 7.51% and 7.18%, respectively, for a certain group of participants under age 65 in our hourly plan and our Arkansas participants covered by a collective bargaining agreement, grading ratably to an assumption of 4.50% in 2038. The actual rates of health care cost increases may vary significantly from the assumption used because of unanticipated changes in health care costs. A one percentage point change in the health care cost trend rates would have the following effects on our December 31, 2019 Consolidated Financial Statements (in thousands) 1% Increase 1% Decrease Effect on total service cost plus interest cost $ 165 $ (126 ) Effect on accumulated postretirement benefit obligation $ 3,282 $ (2,582 )

Components of Accumulated Other

Components of Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Components of Accumulated Other Comprehensive Loss	NOTE 20. COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE LOSS The following tables detail the changes in our Accumulated Other Comprehensive Loss Consolidated Balance Sheets Pension Plans OPEB (in thousands) Gains and losses on cash flow hedging Actuarial Loss Prior Service Cost Actuarial Loss Prior Service Credit Total Balance, December 31, 2017 $ (705 ) $ 100,165 $ 446 $ 7,491 $ (12,546 ) $ 94,851 Net loss (gain) arising during the period 3,062 17,268 — (1,554 ) — 18,776 Amounts reclassified from AOCL to earnings (647 ) (12,276 ) (137 ) (970 ) 6,569 (7,461 ) Amounts reclassified from AOCL to accumulated deficit 1 (150 ) 23,692 95 2,302 (2,674 ) 23,265 Balance, December 31, 2018 1,560 128,849 404 7,269 (8,651 ) 129,431 Net loss (gain) arising during the period 19,824 (2,081 ) — 5,917 — 23,660 Amounts reclassified from AOCL to earnings (1,384 ) (9,988 ) (156 ) (749 ) 6,545 (5,732 ) Balance, December 31, 2019 $ 20,000 $ 116,780 $ 248 $ 12,437 $ (2,106 ) $ 147,359 1 Reclassifications between AOCL and accumulated deficit during 2018 relate to certain tax effects of tax law changes on pension and other postretirement employee benefits and a cash flow hedge upon adoption of ASU 2018-02 during 2018. See Note 15: Derivative Instruments Note 19: Savings Plans, Pension and Other Postretirement Employee Benefits

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 21. COMMITMENTS AND CONTINGENCIES LEGAL MATTERS In January 2007, the Environmental Protection Agency (EPA) notified us that we were a potentially responsible party under the Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA) and the Clean Water Act for cleanup at a site in northern Idaho known as Avery Landing, which we acquired in 1980 from the Milwaukee Railroad. The land we owned at the site and the adjacent properties were contaminated with petroleum as a result of the railroad’s operations at the site prior to 1980. Our remediation was completed in October 2013, and in 2016 the EPA confirmed that we had completed the required cleanup and subsequent monitoring of the property. Separately, in September 2015, the EPA sent us a letter asserting that the Department of Transportation (the current owner of a portion of the adjacent property remediated by the EPA) and the EPA had incurred $9.8 million in unreimbursed response costs associated with the site and that we were liable for such costs. We sold the land at Avery Landing in 2017. In April 2018, the United States District Court for the District of Idaho entered a Consent Decree negotiated by the parties releasing us and our affiliates from any further liability for past response costs incurred by the U.S. government in exchange for a final settlement payment of $6.0 million. At any given time, we are subject to claims and actions incidental to the operations of our business. Based on information currently available, we do not expect that any sums we may receive or have to pay in connection with any legal proceeding would have a materially adverse effect on our consolidated financial position, operating results or net cash flow.

Financial Results by Quarter (U

Financial Results by Quarter (Unaudited)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Data [Abstract]
Financial Results by Quarter (Unaudited)	NOTE 22. FINANCIAL RESULTS BY QUARTER (UNAUDITED) The following table sets forth supplementary financial data (in thousands, except per share amounts) for each quarter for the years ended December 31, 2019 and 2018, derived from our unaudited quarterly financial statements, with the total amounts for each year derived from our audited annual financial statements. The data set forth below should be read in conjunction with and is qualified in its entirety by reference to our Consolidated Financial Statements Year Ended December 31, 2019 (unaudited) (in thousands, except per share amount) First Quarter Second Quarter Third Quarter Fourth Quarter Total Revenues $ 181,716 $ 215,581 $ 226,302 $ 203,499 $ 827,098 Operating income $ 20,107 $ 24,956 $ 31,196 $ 20,024 $ 96,283 Net income $ 6,560 $ 17,137 $ 20,565 $ 11,399 $ 55,661 Net income per share 1 Basic $ 0.10 $ 0.25 $ 0.30 $ 0.17 $ 0.82 Diluted $ 0.10 $ 0.25 $ 0.30 $ 0.17 $ 0.82 Year Ended December 31, 2018 (unaudited) (in thousands, except per share amount) First Quarter Second Quarter Third Quarter Fourth Quarter Total Revenues $ 199,897 $ 268,233 $ 289,199 $ 217,250 $ 974,579 Operating income $ 27,831 $ 69,417 $ 77,742 $ 9,964 $ 184,954 Net income $ 14,597 $ 46,148 $ 60,336 $ 1,799 $ 122,880 Net income per share 1 Basic $ 0.29 $ 0.73 $ 0.96 $ 0.03 $ 2.03 Diluted $ 0.29 $ 0.73 $ 0.93 $ 0.03 $ 1.99 1 Per share amounts are computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the total computed for the year.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
General	GENERAL PotlatchDeltic Corporation and its subsidiaries (collectively referred to in this report as the company, us, we or our) is a leading timberland Real Estate Investment Trust (REIT) with operations in seven states. We are engaged in activities associated with timberland management, including the sale of timber, the management of approximately 1.9 million acres of timberlands and the purchase and sale of timberlands. We are also engaged in the manufacture and sale of wood products and the development of real estate. Our timberlands, real estate development projects and all of our wood products facilities are located within the continental United States. The primary market for our products is the United States. We converted to a REIT effective January 1, 2006. As described in Note 2: Deltic Merger
Consolidation	CONSOLIDATION The Consolidated Financial Statements
Use of Estimates	USE OF ESTIMATES The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, which we refer to in this report as U.S. GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates and assumptions.
Cash and Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash Cash equivalents are investments that are highly liquid with original maturities of three months or less when purchased. At December 31, 2019 and 2018 we had restricted cash of $0.9 million and $2.8 million, respectively included in other long-term assets related to proceeds held by a qualified intermediary that are intended to be reinvested in timberlands. The following provides a reconciliation of cash, cash equivalents, and restricted cash at December 31: (in thousands) 2019 2018 2017 Cash and cash equivalents $ 83,310 $ 76,639 $ 120,457 Restricted cash included in other long-term assets 944 2,802 — Total cash, cash equivalents, and restricted cash $ 84,254 $ 79,441 $ 120,457
Business Combinations	BUSINESS COMBINATIONS We recognize identifiable assets acquired and liabilities assumed at their acquisition date estimated fair value. Goodwill, if any, as of the acquisition date is measured as the excess of consideration transferred over the net of the acquisition date estimated fair value of the assets acquired and the liabilities assumed. While we use our best estimates and assumptions for the purchase price allocation process to value assets acquired and liabilities assumed at the acquisition date, our estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, we record adjustments to the assets acquired and liabilities assumed to the extent that we identify adjustments to the preliminary purchase price allocation. We recognize measurement period adjustments and any resulting effect on earnings during the period in which the adjustment is identified. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to our Consolidated Statements of Income
Revenue Recognition	REVENUE RECOGNITION We recognize revenue in accordance with the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic No. 606, Revenue from Contracts with Customers For our Timberlands segment we generate revenue predominantly in the form of delivered logs, pay-as-cut stumpage contracts, lump sum stumpage contracts and timber deeds. For our Wood Products segment we generate revenue from the sale of manufactured wood products and residual by-products. For our Real Estate segment, we generate revenue from the sale of rural real property deemed non-strategic or identified as having higher and better use alternatives and real estate development and subdivision activity. A performance obligation, as defined in ASC 606, is a promise in a contract to transfer a distinct good or service to a customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue at the point in time, or over the period in which the performance obligation is satisfied. We recognize revenues when control of promised goods or services (performance obligations) is transferred to customers, in an amount that reflects the consideration expected in exchange for those goods or services (transaction price). Performance Obligations On delivered log sales, revenue includes amounts billed for logging and hauling and is recognized at the point the logs are delivered and scaled. Revenue is recognized on timber deeds and lump sum stumpage contracts generally upon closing or when the contracts are effective, which is the point at which the buyer assumes risk of loss associated with the standing timber. We enter into pay-as-cut contracts with customers that provide the customer with the right of access to harvest timber on a specified area of our land. At the execution of the agreement, the customer typically does not take title, control or risk of ownership to the timber. Revenue for pay-as-cut contracts is recognized once scaling occurs as that is the point when control of the harvested trees has transferred to the customer and we have a right to payment. Performance obligations associated with the sale of wood products are typically satisfied when the products are shipped (FOB shipping point) or upon delivery to our customer (FOB destination) depending on the terms of the customer contract. Shipping and handling costs for all wood product, log hauling costs and residual sales are accounted for as cost of goods sold in our Consolidated Statements of Income Performance obligations associated with real estate sales are generally satisfied at a point in time when all conditions of closing have been met and title transfers to the buyer. ASC Topic 606 requires entities to consider significant financing components of contracts with customers, though allows for the use of a practical expedient when the period between satisfaction of a performance obligation and payment receipt is one year or less. Given the nature of our revenue transactions, we have elected to utilize this practical expedient. Contract Estimates Substantially all of the company’s performance obligations are satisfied as of a point in time. The transaction price for log sales generally equals the amount billed to our customer for logs delivered during the accounting period. For the limited number of log sales subject to a long-term supply agreement, the transaction price is variable but is known at the time of billing. For wood products sales, the transaction price is typically the amount billed to the customer for the products shipped but may be reduced slightly for estimated cash discounts and rebates. There are no significant contract estimates related to the real estate business. See Note 4: Revenue Recognition
Inventories	INVENTORIES For most of our operations, we use the last-in, first-out (LIFO) method of valuing log, lumber and plywood inventory. An actual valuation of inventory under the LIFO method occurs only at the end of each year based on the inventory levels and costs at that time. Interim LIFO calculations are based on management’s best estimates of expected year-end inventory levels and costs and are subject to the final year-end LIFO inventory valuation. Inventories valued under LIFO are stated as the lower of cost or market. All segment inventories are reported using the average cost method. The LIFO reserve and intersegment eliminations are recorded at the corporate level. Inventories not valued under LIFO are recorded at the lower of average cost or net realizable value. Expenses associated with idle capacity or abnormally low production are reflected in cost of goods sold in the periods incurred. See Note 7: Inventories
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment are valued at cost less accumulated depreciation. Depreciation of buildings, equipment and other depreciable assets is determined using the straight-line method of depreciation. Major improvements and replacements of property are capitalized. Maintenance, repairs and minor improvements and replacements are expensed. Upon retirement or other disposition of property, applicable cost and accumulated depreciation are removed from the accounts. Any gains or losses are included in operating income. See Note 8: Property, Plant and Equipment
Recovery of Long-Lived Assets	RECOVERY OF LONG-LIVED ASSETS Our long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. We evaluate recoverability of an asset group by comparing its carrying value to the future net undiscounted cash flows that we expect will be generated by the asset group. If the comparison indicates that the carrying value of an asset group is not recoverable, we recognize an impairment loss for the excess of carrying value over the estimated fair value. When we recognize an impairment loss for assets to be held and used, we depreciate the adjusted carrying amount of those assets over their remaining useful life. We also perform a test for recoverability when management has committed to a plan to sell or otherwise dispose of an asset group. Assets to be disposed of are reported at the lower of carrying amount or fair value less cost to sell. There were no events or changes in circumstances that indicated the carrying amounts of our long-lived held and used assets were not recoverable during the years ended December 31, 2019, 2018 or 2017. For the years ended December 31, 2019, 2018 and 2017 we recorded loss on disposal of property, plant and equipment of $0.9 million, $0.7 million and $0.2 million, respectively.
Timber and Timberlands	TIMBER AND TIMBERLANDS Timber and timberlands are valued at cost less accumulated depletion and amortization. We capitalize costs related to stand establishment, which include the preparation of the land for planting, seeds or seedlings and tree planting costs, which include third-party labor costs, materials and other contract services. Upon completion of planting activities and field inspection to confirm the planting operation was successful, a plantation is considered “established.” Subsequent expenditures to maintain the integrity or enhance the growth of an established plantation or stand are expensed. Post-establishment expenses include vegetation control, fertilization, thinning operations and the replanting of seedlings lost through mortality. Forest management costs are considered current operating expenses and include property taxes and insurance, silviculture costs incurred subsequent to stand establishment, cruising of timber volume, property maintenance, salaries, supplies, travel, record-keeping, fire protection and other normal recurring administrative personnel costs. Timberland acquisitions are capitalized based on the relative appraised values of timberland, merchantable timber, pre-production timber (young growth that is not yet merchantable timber), logging roads and other land improvements. The estimated volume of current standing merchantable timber, which is a component of calculating our depletion rates, is updated at least annually to reflect increases due to the reclassification of pre-production timber to merchantable timber when it meets defined diameter specifications, the annual growth of merchantable timber and the acquisition of additional merchantable timber, decreases due to timber harvests and land sales and changes resulting from other factors, such as casualty losses. Timber volumes are estimated from cruises of the timber tracts, which are completed on our timberlands on approximately a five to ten year cycle. Depletion represents the amount charged to expense as timber is harvested. Rates at which timber is depleted are calculated annually for each of our depletion pools by dividing the beginning of year balance of the merchantable timber accounts by the volume of standing merchantable timber, after estimated timber volume updates. The base cost of logging roads, such as clearing, grading and ditching, is not amortized and remains a capitalized item until disposition. Other portions of the initial logging road cost, such as bridges, culverts and gravel surfacing are amortized over their useful lives, which range from 5 to 20 years. Costs associated with temporary logging road spurs, which are typically used for one harvest season, are expensed as incurred. See Note 9: Timber and Timberlands
Intangible Assets	INTANGIBLE ASSETS We recorded intangible assets in connection with the Deltic merger in 2018. We have both indefinite-lived and long-lived intangible assets. Long-lived intangible assets include customer relationships and certain trade names we estimate have a finite life and are being amortized over 10 and 20 years, respectively, and are evaluated for impairment under our Recovery of Long-Lived Assets policy described above. Indefinite-lived intangible assets are not amortized and are tested for potential impairments annually as of October 1, or during the year if an event or other circumstance indicates that we may not be able to recover the carrying amount of the assets. We did not impair any intangible assets during the years ended December 31, 2019 or 2018. See Note 10: Intangible Assets
Leases	LEASES We lease certain equipment, office space and land. Right-of-use (ROU) assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating and finance lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate in determining the present value of lease payments. We consider our recent debt issuances as well as publicly available data for instruments with similar characteristics when calculating our incremental borrowing rates. Most leases include one or more options to renew, with renewal terms that can extend the lease term between one to five years. The exercise of lease renewal options is at our sole discretion. Under the operating lease model, lease expense is recognized on a straight-line basis over the lease term. Under the finance lease model, lease expense consists of the amortization of the ROU asset on a straight-line basis over the asset’s estimated useful life and interest expense calculated using the effective interest method. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. For certain equipment leases, we apply a portfolio approach to effectively account for the operating lease ROU assets and liabilities. For certain equipment leases, such as vehicles, we account for the lease and non-lease components as a single lease component. Certain leases also include options to purchase the leased equipment. The depreciable life of assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise. Certain of our rental payments are adjusted periodically for inflation. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants and we do not have any significant sublease income. See Note 13: Leases
Derivative Instruments	DERIVATIVE INSTRUMENTS We use, from time to time, certain derivative instruments to mitigate exposure to volatility in interest rates and effectively convert a portion of floating rate debt to a fixed rate basis, thus reducing the impact of interest rate changes on future interest expense and cash flows. All derivatives, whether designated as a hedging relationship or not, are recorded in the Consolidated Balance Sheets A fair value hedge is a derivative instrument designated for the purpose of hedging the exposure to changes in fair value of an asset or a liability resulting from a particular risk. If the derivative is designated as a fair value hedge, the changes in the fair value of the derivative and of the hedged item attributable to the hedged risk are both recognized in the results of operations and presented in the same caption in the Consolidated Statements of Income Consolidated Statements of Comprehensive Income For a cash flow hedge, the fair value of the effective portion of the derivative is recognized as an asset or liability with a corresponding amount in Accumulated Other Comprehensive Loss Consolidated Balance Sheets . Accumulated Other Comprehensive Loss If a hedge ceases to qualify for hedge accounting, the contract would continue to be carried on the balance sheet at fair value until settled and adjustments to the contract’s fair value would be recognized in earnings. If a forecasted transaction were no longer probable of occurring, amounts previously deferred in accumulated other comprehensive income (loss) would be recognized immediately in earnings. For derivative instruments not designated as hedges, the change in fair value of the derivative is recognized in earnings each reporting period. We have International Swap Dealers Association ("ISDA") Master Agreements with each counterparty that permits the net settlement of amounts owed under the respective contracts. The ISDA Master Agreement is an industry standardized contract that governs all derivative contracts entered into between the company and the respective counterparty. Under these master netting agreements, net settlement generally permits the company or the counterparty to determine the net amount payable or receivable for contracts due on the same date for similar types of derivative transactions. We have not elected to offset the fair value positions of the derivative contracts recorded in the Consolidated Balance Sheets Note: 15 Derivative Instruments
Company Owned Life Insurance	COMPANY OWNED LIFE INSURANCE We are the beneficiary of insurance policies on the lives of certain past officers and employees. We have recognized the amount that could be realized upon surrender of the insurance policies in other assets in our Consolidated Balance Sheets Consolidated Statements of Income Consolidated Statements of Cash Flows .
Pension and Other Postretirement Benefits	PENSION AND OTHER POSTRETIREMENT BENEFITS We recognize any overfunded or underfunded status of our defined benefit pension and other postretirement plans on our Consolidated Balance Sheets • costs of benefits provided in exchange for employees’ services rendered; • interest cost of the obligation; • expected long-term return on plan assets for funded plans; • amortization of prior service costs and plan amendments over the average remaining service period of the active employee group covered by the plan; and • amortization of cumulative unrecognized net actuarial gains and losses – generally in excess of 10 percent of the greater of the benefit obligation or market-related value of plan assets at the beginning of the year – over the average remaining service period of the active employee group covered by the plan. Different assumptions would change the net periodic pension and postretirement benefit costs and the obligation of the benefit plans. See Note 19: Savings Plans, Pension Plans and Other Postretirement Employee Benefits
Equity-Based Compensation	EQUITY-BASED COMPENSATION Equity-based awards are measured at estimated fair value on the dates they are granted or modified. These measurements establish the cost of the equity-based awards for accounting purposes. Equity-based compensation expense is recognized over the awards’ applicable vesting period using the straight-line method. See Note 17: Equity-Based Compensation Plans
Income Taxes	INCOME TAXES We use the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases, operating loss carryforwards and tax credit carryforwards. Deferred tax assets and liabilities are measured pursuant to tax laws using rates expected to apply to taxable income in the years in which the temporary differences are expected to be recovered or settled. We recognize the effect of a change in income tax rates on deferred tax assets and liabilities in the Consolidated Statements of Income Consolidated Statements of Comprehensive Income We recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities. The determination is based on the technical merits of the position and presumes that each uncertain tax position will be examined by the relevant taxing authority that has full knowledge of all relevant information. See Note 18: Income Taxes
New Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) • to not reassess whether any expired or existing contracts are or contain leases; • to not reassess the lease classification for any expired or existing leases; • to not reassess initial direct costs for any existing leases; • to apply the short-term lease recognition exemption for all leases that qualify; • to not separate non-lease components from lease components; and • to apply the land easement practical expedient for transition of all existing land easements. Upon adoption of this ASU we recorded approximately $14.0 million for right of use assets and lease liabilities for our operating leases on our Consolidated Balance Sheet Consolidated Statement of Income Consolidated Statement of Cash Flows. Note 13: Leases In August 2018, the FASB issued ASU No. 2018-15 Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract In August 2018, the FASB issued ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Reconciliation of Cash, Cash Equivalents, and Restricted Cash	The following provides a reconciliation of cash, cash equivalents, and restricted cash at December 31: (in thousands) 2019 2018 2017 Cash and cash equivalents $ 83,310 $ 76,639 $ 120,457 Restricted cash included in other long-term assets 944 2,802 — Total cash, cash equivalents, and restricted cash $ 84,254 $ 79,441 $ 120,457

Merger with Deltic (Tables)

Merger with Deltic (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Summary of Unaudited Pro Forma Information	The following summarizes unaudited pro forma information that presents combined amounts as if this merger occurred at the beginning of 2017: Year Ended December 31, (in thousands, except per share amounts) 2018 2017 Net sales $ 1,013,242 $ 920,860 Net earnings attributable to PotlatchDeltic common shareholders $ 145,685 $ 77,732 Basic earnings per share attributable to PotlatchDeltic common shareholders $ 2.16 $ 1.15 Diluted earnings per share attributable to PotlatchDeltic common shareholders $ 2.15 $ 1.15
Summary of Estimated Fair Value Measurements of Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair value measurements of assets acquired and liabilities assumed as of the merger date, including measurement period adjustments identified: (in thousands) Preliminary Allocation Measurement Period Adjustments Final Allocation ASSETS Cash and cash equivalents $ 3,419 $ — $ 3,419 Customer receivables 12,709 — 12,709 Inventories 17,316 — 17,316 Other current assets 8,276 (2,991 ) 5,285 Real estate held for development and sale 79,000 4,000 83,000 Property, plant and equipment 265,901 (5,132 ) 260,769 Timber and timberlands 1,060,000 (4,255 ) 1,055,745 Mineral rights — 6,236 6,236 Trade name and customer relationships intangibles 19,000 500 19,500 Other long-term assets 2,010 1,546 3,556 Total assets acquired 1,467,631 (96 ) 1,467,535 LIABILITIES Accounts payable and accrued liabilities 12,604 11 12,615 Long-term debt 229,968 144 230,112 Pension and other postretirement employee benefits 36,909 — 36,909 Deferred tax liabilities, net 44,439 (251 ) 44,188 Other long-term liabilities 936 — 936 Total liabilities assumed 324,856 (96 ) 324,760 Net assets acquired $ 1,142,775 $ — $ 1,142,775

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Summary of Revenues by Major Product	The following table represents our revenues by major product. We adopted ASC 606, Revenue from Contracts with Customers Revenue Recognition Note 1: Summary of Significant Accounting Policies Note 5: Segment Information Year Ended December 31, (in thousands) 2019 2018 2017 Timberlands Northern region Sawlogs $ 161,570 $ 205,977 $ 190,693 Pulpwood 5,767 5,996 5,634 Stumpage 109 176 153 Other 1,970 1,801 1,387 Total Northern revenues 169,416 213,950 197,867 Southern region Sawlogs 88,048 81,460 40,993 Pulpwood 53,315 48,585 34,907 Stumpage 1,666 2,434 557 Other 10,248 8,521 3,875 Total Southern revenues 153,277 141,000 80,332 Total Timberlands revenues 322,693 354,950 278,199 Wood Products Lumber 396,648 464,180 313,083 Residuals and Panels 143,760 216,751 128,074 Total Wood Products revenues 540,408 680,931 441,157 Real Estate Rural real estate 49,675 36,024 30,655 Development real estate 22,363 12,852 — Other 1 6,834 5,690 — Total Real Estate revenues 78,872 54,566 30,655 Total segment revenues 941,973 1,090,447 750,011 Intersegment Timberlands revenues 2 (114,875 ) (115,868 ) (71,416 ) Total consolidated revenues $ 827,098 $ 974,579 $ 678,595 1 Other Real Estate revenues primarily relate to the Chenal Country Club. 2 Intersegment revenues represent logs sold by our Timberlands segment to the Wood Products segment.

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Summary of Information by Business Segment	Year Ended December 31, (in thousands) 2019 2018 2017 Revenues: Timberlands $ 322,693 $ 354,950 $ 278,199 Wood Products 540,408 680,931 441,157 Real Estate 78,872 54,566 30,655 941,973 1,090,447 750,011 Intersegment Timberlands revenues 1 (114,875 ) (115,868 ) (71,416 ) Total consolidated revenues $ 827,098 $ 974,579 $ 678,595 Adjusted EBITDDA: Timberlands $ 133,987 $ 169,834 $ 126,707 Wood Products 12,901 130,583 80,624 Real Estate 62,650 40,304 25,720 Corporate (36,257 ) (37,785 ) (34,302 ) Eliminations and adjustments 5,662 (5,743 ) (2,992 ) Total Adjusted EBITDDA 178,943 297,193 195,757 Basis of real estate sold (20,554 ) (16,698 ) (6,827 ) Depreciation, depletion and amortization (70,417 ) (70,848 ) (28,432 ) Interest expense, net 2 (30,361 ) (35,227 ) (27,049 ) Loss on extinguishment of debt (5,512 ) - - Non-operating pension and other postretirement employee benefits (3,739 ) (7,648 ) (6,384 ) Loss on fixed assets (865 ) (725 ) (204 ) Gain on sale of facility 9,176 — — Inventory purchase price adjustment in cost of goods sold 3 — (1,849 ) — Deltic merger-related costs 4 — (22,119 ) (3,409 ) Environmental charges for Avery Landing — — (4,978 ) Income before income taxes $ 56,671 $ 142,079 $ 118,474 Depreciation, depletion and amortization: Timberlands $ 46,601 $ 48,201 $ 20,476 Wood Products 22,059 21,416 7,347 Real Estate 678 418 2 Corporate 1,079 813 607 70,417 70,848 28,432 Bond discount and deferred loan fees 2 1,688 2,313 1,480 Total depreciation, depletion and amortization $ 72,105 $ 73,161 $ 29,912 Basis of real estate sold: Real Estate $ 20,749 $ 16,954 $ 7,114 Elimination and adjustments (195 ) (256 ) (287 ) Total basis of real estate sold $ 20,554 $ 16,698 $ 6,827 Assets: Timberlands 5 $ 1,655,407 $ 1,693,162 $ 669,288 Wood Products 398,465 456,306 154,479 Real Estate 6 87,421 93,208 952 2,141,293 2,242,676 824,719 Corporate 93,766 83,176 128,360 Total consolidated assets $ 2,235,059 $ 2,325,852 $ 953,079 Capital Expenditures: 7 Timberlands $ 17,500 $ 17,232 $ 15,120 Wood Products 37,232 27,341 10,723 Real Estate 8 8,053 5,987 87 62,785 50,560 25,930 Corporate 1,317 1,747 2,132 Total capital expenditures $ 64,102 $ 52,307 $ 28,062 1 Intersegment revenues represent logs sold by our Timberlands segment to our Wood Products segment. 2 Bond discounts and deferred loan fees are reported within interest expense on the Consolidated Statements of Income 3 The effect of costs of goods sold for fair value adjustments to the carrying amounts of inventory acquired in business combinations. See Note 2: Merger with Deltic. 4 For integration and restructuring costs related to the merger with Deltic see Note 2: Merger with Deltic. 5 We do not report rural real estate separate from Timberlands as we do not report these assets separately to management. 6 Real Estate assets primarily consist of real estate development acquired with the Deltic merger. 7 Does not include the acquisition of timber and timberlands, all of which were acquired by the Timberlands segment. 8 Real Estate capital expenditures include development expenditures of $7.3 million, $5.0 million and $0 for the year ended December 31, 2019, 2018 and 2017, respectively.
Schedule of Revenues by Geographic Area	All of our timberlands, wood products facilities and other assets are located within the continental United States. Geographic information regarding our revenues for the years ended December 31 is as follows: (in thousands) 2019 2018 2017 United States $ 825,105 $ 972,457 $ 676,956 Canada 128 624 481 Mexico 1,865 1,498 1,158 Total consolidated revenues $ 827,098 $ 974,579 $ 678,595

Earnings per Share (Tables)

Earnings per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Reconciliation of Number of Shares Used in Calculating Basic and Diluted Earnings per Share	The following table reconciles the number of shares used in calculating basic and diluted earnings per share for the years ended December 31: (in thousands, except per share amounts) 2019 2018 2017 Net income $ 55,661 $ 122,880 $ 86,453 Basic weighted-average shares outstanding 67,608 60,534 40,824 Incremental shares due to: Performance shares 109 230 363 Restricted stock units 26 34 40 Stock portion of earnings and profits distribution — 1,016 — Diluted weighted-average shares outstanding 67,743 61,814 41,227 Basic net income per share $ 0.82 $ 2.03 $ 2.12 Diluted net income per share $ 0.82 $ 1.99 $ 2.10

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2019
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consist of the following at December 31: (in thousands) 2019 2018 Logs $ 33,313 $ 37,303 Lumber, plywood and veneer 31,639 27,420 Materials and supplies 12,831 11,310 77,783 76,033 Less: LIFO reserve (12,002 ) (15,228 ) Total inventories $ 65,781 $ 60,805

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Property Plant And Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, Plant and Equipment consist of the following at December 31: (in thousands) Range of useful lives 2019 2018 Land $ 7,875 $ 6,078 Buildings and improvements 10-40 years 123,342 92,326 Machinery and equipment 2-25 years 360,570 364,101 Construction in progress 6,326 10,190 498,113 472,695 Less: accumulated depreciation (211,730 ) (200,502 ) Total property, plant and equipment, net $ 286,383 $ 272,193

Timber and Timberlands (Tables)

Timber and Timberlands (Tables)	12 Months Ended
	Dec. 31, 2019
Timber And Timberlands [Abstract]
Schedule of Timber and Timberlands	Timber and Timberlands consist of the following at December 31: (in thousands) 2019 2018 Timber and timberlands $ 1,554,882 $ 1,590,997 Logging roads 83,781 81,818 Total timber and timberlands, net $ 1,638,663 $ 1,672,815

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets	Intangible Assets consist of the following at December 31: (in thousands) 2019 2018 Indefinite-lived intangible assets $ 10,200 $ 10,200 Long-lived intangible assets 8,398 9,300 Assets held for sale — (902 ) Accumulated amortization (1,549 ) (770 ) Long-lived intangible assets, net 6,849 7,628 Total intangible assets, net $ 17,049 $ 17,828

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Other Assets [Abstract]
Schedule of Other Current Assets	(in thousands) 2019 2018 Real estate held for sale $ 10,974 $ 10,322 Prepaid expenses 3,097 3,194 Tax receivables 1,341 6,659 Other receivables 4,771 2,500 Total other current assets $ 20,183 $ 22,675 Other Long-Term Assets consist of the following at December 31:
Schedule of Other Long-term Assets	(in thousands) 2019 2018 Operating leases $ 15,772 $ — Mineral rights 5,254 5,735 Investment in company owned life insurance (COLI), net 4,157 3,104 Real estate development costs 3,776 2,649 Debt issuance costs 1,846 2,405 Interest rate swaps 1,601 1,510 Restricted cash 944 2,802 Other 1,940 3,076 Total other long-term assets $ 35,290 $ 21,281

Accounts Payable and Accrued _2

Accounts Payable and Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2019
Accounts Payable And Accrued Liabilities Current And Noncurrent [Abstract]
Schedule of Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities consist of the following at December 31: (in thousands) 2019 2018 Accrued payroll and benefits $ 12,920 $ 20,130 Accounts payable 12,734 12,073 Accrued interest 6,946 8,642 Accrued taxes 6,638 7,389 Deferred revenue 5,514 4,282 Operating lease liabilities 4,998 — Other current liabilities 10,827 8,477 Total accounts payable and accrued liabilities $ 60,577 $ 60,993

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Schedule of Supplemental Balance Sheet Information Related Leases	Balance Sheet Classification The following table provides supplemental balance sheet information related to our leases: (in thousands) Classification December 31, 2019 Assets Operating lease assets Other long-term assets $ 15,772 Finance lease assets 1 Property, plant and equipment, net 2,360 Total lease assets $ 18,132 Liabilities Current Operating lease liabilities Accounts payable and accrued liabilities $ 4,998 Finance lease liabilities Accounts payable and accrued liabilities 644 Noncurrent Operating lease liabilities Other long-term obligations 10,775 Finance lease liabilities Other long-term obligations 1,703 Total lease liabilities $ 18,120 1 Finance lease assets are presented net of accumulated amortization of $0.3 million as of December 31, 2019.
Schedule of Weighted Average Remaining Terms and Discount Rate	December 31, 2019 Weighted-average remaining terms (years) Operating leases 4.22 Finance leases 3.83 Weighted-average discount rate Operating leases 4.17 % Finance leases 3.54 %
Schedule of Components of Lease Expense	Lease Costs The following table summarizes the components of our lease expense: Year Ended December 31, (in thousands) 2019 2018 2017 Operating lease costs 1 $ 5,938 $ 4,989 $ 4,519 Finance lease costs Amortization of leased assets 269 — — Interest on lease assets 40 — — Net lease costs $ 6,247 $ 4,989 $ 4,519 1 Excludes short-term leases and variable lease costs, which are immaterial.
Schedule of Supplemental Cash Flow Information Related Leases	Other Lease Information The below table presents supplemental cash flow information related to leases: Year Ended (in thousands) December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 5,963 Operating cash flows for finance leases $ 40 Financing cash flows for finance leases $ 283 Leased assets exchanged for new lease liabilities: Operating leases $ 7,135 Finance leases $ 2,630
Schedule of Maturity of Lease Liabilities	Maturity of Lease Liabilities At December 31, 2019, the future minimum lease payment obligations under noncancelable leases were as follows: (in thousands) Operating Leases Finance Leases 2020 $ 5,549 $ 716 2021 4,454 696 2022 2,756 611 2023 1,821 358 2024 965 128 After 2024 1,689 — Total lease payments 17,234 2,509 Less: interest 1,461 162 Present value of lease liabilities $ 15,773 $ 2,347

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Long-term debt consists of the following at December 31: (in thousands) 2019 2018 Variable rate term loans 1 $ 397,500 $ 247,500 Fixed rate term loans 2 296,000 296,000 7 1/2 — 150,000 Revenue bonds 3 65,735 65,735 Medium-term notes 4 3,000 3,000 Long-term principal 762,235 762,235 Interest rate swaps — (183 ) Debt issuance costs (2,086 ) (2,143 ) Unamortized discounts (3,680 ) (4,545 ) Total long-term debt 756,469 755,364 Less current portion of long-term debt (45,974 ) (39,973 ) Long-term debt $ 710,495 $ 715,391 1 Variable rate term loans are at rates of one or three-month LIBOR plus a spread between 1.85% and 2.15% and mature between 2020 and 2029. At December 31, 2019, the one and three-month LIBOR rates were 1.69% and 2.10%, respectively. We have entered into interest rate swaps for these variable rate term loans to fix the interest rate. See N ote 15: Derivative Instruments 2 Fixed rate term loans are at rates between 3.70% and 4.64% and mature between 2022 and 2025. 3 Revenue bonds have a fixed rate of 2.75% and mature in 2024. 4 Medium term notes have a fixed rate of 8.75% and mature in 2022 .
Schedule of Maturities of Long-term Debt	Scheduled principal payments due on long-term debt at December 31, 2019 are as follows: (in thousands) 2020 $ 46,000 2021 40,000 2022 43,000 2023 40,000 2024 175,735 Thereafter 417,500 Total $ 762,235

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
Derivative Instrument Detail [Abstract]
Fair Value of Cash Flow Derivative Instruments	The fair values of our cash flow derivative instruments on our Consolidated Balance Sheets Asset Derivatives Liability Derivatives (in thousands) Location 2019 2018 Location 2019 2018 Derivatives designated in cash flow hedging relationships: Interest rate contracts Other assets, non-current $ 1,601 $ 1,510 Other long-term obligations $ 22,398 $ 2,888
Effect of Derivatives on Consolidated Statements of Income	The following table details the effect of derivatives on our Consolidated Statements of Income Year Ended December 31, (in thousands) Location 2019 2018 2017 Derivatives designated in fair value hedging relationships: Interest rate contracts Realized gain (loss) on interest rate contracts 1 Interest expense $ — $ (191 ) $ 413 Loss on hedged debt basis adjustment included in debt extinguishment (165 ) — — $ (165 ) $ (191 ) $ 413 Derivatives designated in cash flow hedging relationships: Interest rate contracts Loss recognized in other comprehensive income, net of tax $ (19,824 ) $ (3,062 ) $ (145 ) Loss reclassified from accumulated other comprehensive loss 1 Interest expense $ (1,384 ) $ (647 ) $ (149 ) Derivatives not designated as hedging instruments: Lumber price contracts Realized gain on lumber price swap Gain on lumber price swap $ — $ — $ 1,088 Interest expense, net $ 30,361 $ 35,227 $ 27,049 1 Consolidated Statements of Cash Flows

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2019
Derivative Instrument Detail [Abstract]
Carrying Amounts and Estimated Fair Value of Financial Instruments	Carrying amounts and estimated fair values of our financial instruments as of December 31 are as follows: 2019 2018 (in thousands) Carrying Amount Fair Value Carrying Amount Fair Value Cash, cash equivalents and restricted cash (Level 1) $ 84,254 $ 84,254 $ 79,441 $ 79,441 Derivative assets related to interest rate swaps (Level 2) $ 1,601 $ 1,601 $ 1,510 $ 1,510 Derivative liabilities related to interest rate swaps (Level 2) $ (22,398 ) $ (22,398 ) $ (2,888 ) $ (2,888 ) Long-term debt, including current portion (Level 2): Term loans $ (689,820 ) $ (703,437 ) $ (539,169 ) $ (539,037 ) Senior notes — — (149,786 ) (154,328 ) Revenue bonds (65,735 ) (68,200 ) (94,735 ) (93,144 ) Medium-term notes (3,000 ) (3,480 ) (3,000 ) (3,419 ) Total long-term debt 1 $ (758,555 ) $ (775,117 ) $ (786,690 ) $ (789,928 ) Company owned life insurance (Level 3) $ 4,157 $ 4,157 $ 3,104 $ 3,104 1 The carrying amount of long-term debt includes principal and unamortized discounts. At December 31, 2018, long-term debt in the above table included the $29.0 million of revenue bonds for the MDF facility which was classified as held for sale. See Note 3: Sale of Deltic MDF Facility

Equity-Based Compensation Pla_2

Equity-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Share Based Compensation [Abstract]
Details of Equity-Based Compensation Expense and Related Income Tax Benefit	The following table details our compensation expense and the related income tax benefit for the years ended December 31: (in thousands) 2019 2018 2017 Employee equity-based compensation expense: Performance stock awards $ 4,605 $ 4,157 $ 3,582 Restricted stock units 2,595 2,024 1,140 Deferred compensation stock equivalent units expense 72 213 657 Accelerated share-based termination benefits in connection with the merger — 1,812 — Total equity-based compensation expense $ 7,272 $ 8,206 $ 5,379 Total tax benefit recognized for shared-based payment awards $ 314 $ 332 $ 379
Fair Value of Performance Share Awards	The following table presents the key inputs used in calculating the fair value of the PSAs and the resulting fair values: Year Ended December 31, 2019 2018 2017 Stock price as of valuation date $ 35.01 $ 54.00 $ 43.60 Risk-free rate 2.47 % 2.46 % 1.61 % Expected volatility 25.15 % 23.74 % 24.22 % Expected dividend yield 1 — 2.96 % 3.44 % Expected term (years) 3.00 3.00 3.00 Fair value of a performance share $ 37.87 $ 75.37 $ 53.85 1
Summary of Outstanding Performance Share Awards	The following table summarizes outstanding PSAs as of December 31 and the changes during each year: 2019 2018 2017 (in thousands, except per share amounts) Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Nonvested shares outstanding at January 1 142,238 $ 63.91 200,631 $ 39.19 203,788 $ 32.59 Granted 142,066 $ 37.87 67,747 $ 75.37 78,033 $ 53.85 Vested (75,048 ) $ 53.85 (121,058 ) $ 30.02 (78,129 ) $ 36.71 Forfeited (13,249 ) $ 45.35 (5,082 ) $ 47.90 (3,061 ) $ 34.68 Nonvested shares outstanding at December 31 196,007 $ 50.15 142,238 $ 63.91 200,631 $ 39.19 Total grant date fair value of PSAs vested during the year $ 4,041 $ 3,634 $ 2,868 Total fair value of PSAs vested during the year $ 3,561 $ 6,397 $ 7,797 Aggregate intrinsic value of nonvested PSAs at December 31 $ 8,481 $ 4,500 $ 10,011
Summary of Outstanding RSU Awards	The following table summarizes outstanding RSU awards as of December 31 and the changes during each year: 2019 2018 2017 (in thousands, except per share amounts) Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Nonvested shares outstanding at January 1 72,020 $ 47.66 67,871 $ 32.87 71,420 $ 31.61 Granted 104,488 $ 36.80 49,193 $ 49.96 26,507 $ 43.64 Vested (43,102 ) $ 45.51 (41,350 ) $ 26.33 (29,039 ) $ 39.65 Forfeited (5,935 ) $ 40.26 (3,694 ) $ 45.36 (1,017 ) $ 31.63 Nonvested shares outstanding at December 31 127,471 $ 39.83 72,020 $ 47.66 67,871 $ 32.87 Total grant date fair value of RSU awards vested during the year $ 1,961 $ 1,089 $ 1,151 Total fair value of RSU awards vested during the year $ 1,771 $ 1,328 $ 1,442 Aggregate intrinsic value of nonvested RSU awards at December 31 $ 5,516 $ 2,279 $ 3,387

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of the Income Tax Provision Allocated to Continuing Operations	Income tax expense consists of the following for the years ended December 31: (in thousands) 2019 2018 2017 Current $ 12,055 $ 7,038 $ 16,657 Deferred (11,082 ) 11,370 14,325 Net operating loss carryforwards 37 791 1,039 Income tax provision $ 1,010 $ 19,199 $ 32,021
Schedule of Effective Income Tax Rate Reconciliation	Income tax expense differs from the amount computed by applying the statutory federal income tax rate of 21% for 2019 and 2018 and 35% for 2017 to income before income taxes due to the following for the years ended December 31: (in thousands) 2019 2018 2017 U.S. federal statutory income tax $ 11,901 $ 29,837 $ 41,466 REIT income not subject to federal income tax (11,285 ) (8,773 ) (20,651 ) U.S. tax rate change on deferred tax assets and liabilities — — 10,528 Pension contribution deducted at higher tax rate — (5,665 ) — Change in valuation allowance (395 ) — 140 State income taxes, net of federal income tax 903 3,712 2,608 Domestic production activities deduction — — (1,511 ) Permanent book-tax differences (793 ) (771 ) (252 ) Research and development credits — — (294 ) Other items, net 679 859 (13 ) Income tax provision $ 1,010 $ 19,199 $ 32,021 Effective tax rate 1.8 % 13.5 % 27.0 %
Schedule of Deferred Tax Assets and Liabilities	The tax effects of significant temporary differences creating deferred tax assets and liabilities at December 31 were: (in thousands) 2019 2018 Deferred tax assets: Pension and other postretirement employee benefits $ 32,110 $ 30,523 Inventories 754 601 Tax credits 2,190 2,688 Nondeductible accruals 815 1,039 Incentive compensation 1,044 1,000 Employee benefits 1,316 1,452 Other 1,296 320 Total deferred tax assets 39,525 37,623 Valuation allowance (395 ) (790 ) Deferred tax assets, net of valuation allowance 39,130 36,833 Deferred tax liabilities: Timber and timberlands, net (965 ) (1,025 ) Property, plant and equipment, net (50,901 ) (58,909 ) Intangible assets, net (3,778 ) (4,134 ) Real estate development (1,402 ) (2,035 ) Other (2,249 ) (2,739 ) Total deferred tax liabilities (59,295 ) (68,842 ) Deferred tax liabilities, net $ (20,165 ) $ (32,009 )
Summary of Tax Years Subject to Examination by Major Taxing Jurisdictions	The following table summarizes the tax years subject to examination by major taxing jurisdictions: Jurisdiction Years Federal 2016 — 2019 Arkansas 2016 — 2019 Idaho 2016 — 2019 Michigan 2015 — 2019 Minnesota 2015 — 2019
Summary of Reconciliation of Unrecognized Tax Benefits	A reconciliation of the beginning and ending unrecognized tax benefits is as follows: (in thousands) 2019 2018 Balance at January 1 $ 564 $ 564 Additions for tax positions of prior years — — Reduction for tax positions of prior years (564 ) — Balance at December 31 $ — $ 564

Savings Plans, Pension Plans _2

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2019
General Discussion Of Pension And Other Postretirement Benefits [Abstract]
Schedule of Changes in Projected Benefit Obligations	The change in benefit obligation, change in plan assets and funded status for company-sponsored benefit plans and obligations are as follows: Pension Plans OPEB (in thousands) 2019 2018 2019 2018 Benefit obligation at beginning of year $ (427,909 ) $ (392,371 ) $ (40,032 ) $ (30,349 ) Service cost (7,767 ) (8,454 ) (371 ) (341 ) Interest cost (18,465 ) (16,992 ) (1,588 ) (1,482 ) Actuarial (loss) gain (53,446 ) 20,445 (7,997 ) 2,100 Benefits paid 33,350 31,530 3,593 3,582 Plan acquisitions — (62,067 ) — (13,542 ) Benefit obligation at end of year $ (474,237 ) $ (427,909 ) $ (46,395 ) $ (40,032 ) Fair value of plan assets at beginning of year $ 351,285 $ 313,862 $ — $ — Actual return (loss) on plan assets 78,448 (23,745 ) — — Employer contributions and benefit payments 2,085 53,998 3,593 3,582 Benefits paid (33,350 ) (31,530 ) (3,593 ) (3,582 ) Plan acquisitions — 38,700 — — Fair value of plan assets at end of year $ 398,468 $ 351,285 $ — $ — Amounts recognized in the consolidated balance sheets: Current liabilities $ (2,152 ) $ (2,121 ) $ (4,549 ) $ (3,876 ) Noncurrent liabilities (73,617 ) (74,503 ) (41,846 ) (36,156 ) Funded status $ (75,769 ) $ (76,624 ) $ (46,395 ) $ (40,032 )
Schedule of Actual Asset Allocations of the Pension Benefit Plans' Assets	The asset allocations of the pension benefit plans’ assets at December 31 by asset category are as follows: Pension Plans Asset Category 2019 2018 Global equities 32 % 30 % Fixed income securities 54 58 Other (includes cash and cash equivalents and alternatives) 14 12 Total 100 % 100 %
Schedule of Allocation of Plan Assets	Fair value measurements are as follows: (in thousands) December 31, 2019 Asset Category Level 1 Level 2 Total Cash and cash equivalents $ 6,671 $ — $ 6,671 Global equity securities 1 127,688 — 127,688 Fixed income securities 5 173,464 40,554 214,018 Alternatives 6 50,091 — 50,091 Total $ 357,914 $ 40,554 $ 398,468 (in thousands) December 31, 2018 Asset Category Level 1 Level 2 Total Cash and cash equivalents $ 4,120 $ — $ 4,120 Domestic equity securities 2 31,315 23,384 54,699 International equity securities 3 — 21,848 21,848 Emerging markets 4 6,909 21,225 28,134 Fixed income securities 5 204,072 — 204,072 Alternatives 6 — 38,412 38,412 Total $ 246,416 $ 104,869 $ 351,285 1 2 Level 1 assets are managed investments in the U.S., small/mid-cap equities that track the Russell 2500 Growth index or Russell 2500 Value index. Level 2 assets are collective investments, which are invested in U.S. large-cap equities that track the S&P 500. 3 Level 2 assets are collective investments in equity funds of developed markets outside of the United States and Canada that track the MSCI EAFE Value index or MSCI EAFE Growth index. 4 Level 1 assets are mutual funds which are invested in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index. Level 2 assets are collective investments in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index. 5 Level 1 assets are investments in a diversified portfolio of fixed income instruments of varying maturities representing corporates, U.S. treasuries, municipals and futures. Level 2 assets are thinly traded investments in a diversified portfolio of fixed income instruments of varying maturities representing mostly corporates securities. Both Level 1 & Level 2 investments track the Bloomberg Barclay’s Long-term Credit Index. 6 Level 1 assets are long-term investment funds which are invested in tangible assets and real asset companies such as, infrastructure, natural resources and timber. Level 2 assets are collective investments in inflation-indexed bonds, securities of real estate companies, commodity index-linked notes, fixed income securities, foreign currencies, securities of natural resource companies, master limited partnerships, publicly listed infrastructure companies, floating-rate debt, securities of global agriculture companies and securities of global timber companies.
Pre-tax Components of Net Periodic Cost (Benefit)	Pre-tax components of net periodic cost (benefit) recognized in our Consolidated Statements of Income Pension Plans OPEB (in thousands) 2019 2018 2017 2019 2018 2017 Service cost $ 7,767 $ 8,454 $ 6,753 $ 371 $ 341 $ 14 Interest cost 18,465 16,992 16,096 1,588 1,482 1,262 Expected return on plan assets (22,190 ) (20,035 ) (18,406 ) — — — Amortization of prior service cost (credit) 211 186 288 (8,844 ) (8,877 ) (8,877 ) Amortization of actuarial loss 13,497 16,589 14,484 1,012 1,311 1,537 Net periodic cost (benefit) $ 17,750 $ 22,186 $ 19,215 $ (5,873 ) $ (5,743 ) $ (6,064 )
Schedule of Accumulated Other Comprehensive Income (Loss)	The amounts recorded in Accumulated Other Comprehensive Loss Consolidated Balance Sheets Pension Plans OPEB (in thousands) 2019 2018 2019 2018 Net loss $ 116,780 $ 128,849 $ 12,437 $ 7,269 Prior service cost (credit) 248 404 (2,106 ) (8,651 ) Net amount recognized $ 117,028 $ 129,253 $ 10,331 $ (1,382 )
Schedule of Expected Future Benefit Payments	Estimated future benefit payments, which reflect expected future service are as follows for the years indicated: (in thousands) Pension Plans OPEB 2020 $ 30,769 $ 4,548 2021 $ 30,756 $ 3,780 2022 $ 30,689 $ 3,595 2023 $ 30,589 $ 3,402 2024 $ 30,232 $ 3,148 2025–2029 $ 143,237 $ 12,966
Weighted Average Assumptions Used to Determine the Benefit Obligation for Non-Deltic and Deltic Plans	The weighted average assumptions used to determine the benefit obligation for non-Deltic plans as of December 31 were: Pension Plans OPEB 2019 2018 2019 2018 Discount rate 3.40 % 4.40 % 3.40 % 4.40 % Rate of salaried compensation increase 3.00 % 3.00 % — — The weighted average assumptions used to determine the benefit obligation for Deltic plans as of December 31 were: Pension Plans OPEB 2019 2018 2019 2018 Discount rate 3.40 % 4.40 % 3.40 % 4.40 % Rate of salaried compensation increase 4.00 % 4.00 % — —
Schedule of Weighted Average Assumptions Used to Determine the Net Periodic Cost (Benefit) for Non-Deltic and Deltic Plans	The weighted average assumptions used for non-Deltic plans to determine the net periodic cost (benefit) for the years ended December 31 were: Pension Plans OPEB 2019 2018 2017 2019 2018 2017 Discount rate 4.40 % 3.85 % 4.40 % 4.40 % 3.65 % 4.10 % Expected return on plan assets 6.25 % 6.25 % 6.50 % — — — Rate of salaried compensation increase 3.00 % 3.00 % 3.00 % — — — The weighted average assumptions used for Deltic plans to determine the net periodic cost (benefit) for the years ended December 31 were: Pension Plans OPEB 2019 2018 2019 2018 Discount rate 4.40 % 4.30 % 4.40 % 4.30 % Expected return on plan assets 6.25 % 6.25 % — — Rate of salaried compensation increase 4.00 % 4.00 % — —
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates	A one percentage point change in the health care cost trend rates would have the following effects on our December 31, 2019 Consolidated Financial Statements (in thousands) 1% Increase 1% Decrease Effect on total service cost plus interest cost $ 165 $ (126 ) Effect on accumulated postretirement benefit obligation $ 3,282 $ (2,582 )

Components of Accumulated Oth_2

Components of Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Changes in Accumulated Other Comprehensive Loss	The following tables detail the changes in our Accumulated Other Comprehensive Loss Consolidated Balance Sheets Pension Plans OPEB (in thousands) Gains and losses on cash flow hedging Actuarial Loss Prior Service Cost Actuarial Loss Prior Service Credit Total Balance, December 31, 2017 $ (705 ) $ 100,165 $ 446 $ 7,491 $ (12,546 ) $ 94,851 Net loss (gain) arising during the period 3,062 17,268 — (1,554 ) — 18,776 Amounts reclassified from AOCL to earnings (647 ) (12,276 ) (137 ) (970 ) 6,569 (7,461 ) Amounts reclassified from AOCL to accumulated deficit 1 (150 ) 23,692 95 2,302 (2,674 ) 23,265 Balance, December 31, 2018 1,560 128,849 404 7,269 (8,651 ) 129,431 Net loss (gain) arising during the period 19,824 (2,081 ) — 5,917 — 23,660 Amounts reclassified from AOCL to earnings (1,384 ) (9,988 ) (156 ) (749 ) 6,545 (5,732 ) Balance, December 31, 2019 $ 20,000 $ 116,780 $ 248 $ 12,437 $ (2,106 ) $ 147,359 1 Reclassifications between AOCL and accumulated deficit during 2018 relate to certain tax effects of tax law changes on pension and other postretirement employee benefits and a cash flow hedge upon adoption of ASU 2018-02 during 2018.

Financial Results by Quarter _2

Financial Results by Quarter (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Data [Abstract]
Schedule of Quarterly Financial Information	The following table sets forth supplementary financial data (in thousands, except per share amounts) for each quarter for the years ended December 31, 2019 and 2018, derived from our unaudited quarterly financial statements, with the total amounts for each year derived from our audited annual financial statements. The data set forth below should be read in conjunction with and is qualified in its entirety by reference to our Consolidated Financial Statements Year Ended December 31, 2019 (unaudited) (in thousands, except per share amount) First Quarter Second Quarter Third Quarter Fourth Quarter Total Revenues $ 181,716 $ 215,581 $ 226,302 $ 203,499 $ 827,098 Operating income $ 20,107 $ 24,956 $ 31,196 $ 20,024 $ 96,283 Net income $ 6,560 $ 17,137 $ 20,565 $ 11,399 $ 55,661 Net income per share 1 Basic $ 0.10 $ 0.25 $ 0.30 $ 0.17 $ 0.82 Diluted $ 0.10 $ 0.25 $ 0.30 $ 0.17 $ 0.82 Year Ended December 31, 2018 (unaudited) (in thousands, except per share amount) First Quarter Second Quarter Third Quarter Fourth Quarter Total Revenues $ 199,897 $ 268,233 $ 289,199 $ 217,250 $ 974,579 Operating income $ 27,831 $ 69,417 $ 77,742 $ 9,964 $ 184,954 Net income $ 14,597 $ 46,148 $ 60,336 $ 1,799 $ 122,880 Net income per share 1 Basic $ 0.29 $ 0.73 $ 0.96 $ 0.03 $ 2.03 Diluted $ 0.29 $ 0.73 $ 0.93 $ 0.03 $ 1.99 1 Per share amounts are computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the total computed for the year.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands, a in Millions	12 Months Ended
	Dec. 31, 2019USD ($)a	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Principle Accounting Policies [Line Items]
Timber And Timberlands Acres Owned | a	1.9
Restricted cash included in other long-term assets	$ 944	$ 2,802
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Loss on disposal of property	$ 900	$ 700	$ 200
Defined benefit obligation of plan assets description	amortization of cumulative unrecognized net actuarial gains and losses – generally in excess of 10 percent of the greater of the benefit obligation or market-related value of plan assets at the beginning of the year – over the average remaining service period of the active employee group covered by the plan.
Operating lease, right of use asset	$ 15,772
Operating lease, liability	15,773
ASU 2016-02 [Member]
Principle Accounting Policies [Line Items]
Operating lease, right of use asset	14,000
Operating lease, liability	$ 14,000
Intangible Assets, Amortization Period [Member] | Customer Relationships [Member]
Principle Accounting Policies [Line Items]
Finite-lived intangible asset, useful life	10 years
Intangible Assets, Amortization Period [Member] | Trade Names [Member]
Principle Accounting Policies [Line Items]
Finite-lived intangible asset, useful life	20 years
Maximum [Member]
Principle Accounting Policies [Line Items]
Business combination measurement period	1 year
Operating leases, options to extend leases term	5 years
Maximum [Member] | Timber and Timberlands [Member]
Principle Accounting Policies [Line Items]
Timber volume estimate, review period	10 years
Property, plant and equipment, useful life	20 years
Minimum [Member]
Principle Accounting Policies [Line Items]
Operating leases, options to extend leases term	1 year
Minimum [Member] | Timber and Timberlands [Member]
Principle Accounting Policies [Line Items]
Timber volume estimate, review period	5 years
Property, plant and equipment, useful life	5 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Reconciliation of Cash, Cash Equivalents, and Restricted Cash) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Cash and cash equivalents	$ 83,310	$ 76,639	$ 120,457
Restricted cash included in other long-term assets	$ 944	$ 2,802
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Total cash, cash equivalents, and restricted cash	$ 84,254	$ 79,441	$ 120,457	$ 82,584

Merger with Deltic (Narrative)

Merger with Deltic (Narrative) (Details) $ in Thousands, shares in Millions		Nov. 15, 2018shares	Feb. 20, 2018USD ($)aSawmill	Feb. 19, 2018USD ($)	Feb. 28, 2018shares	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2019USD ($)shares	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Business Acquisition [Line Items]
Total assets acquired			$ 1,467,535
Liabilities assumed			$ 324,760
Merger-related costs	[1]															$ 22,119	$ 3,409
Revenue						$ 203,499	$ 226,302	$ 215,581	$ 181,716	$ 217,250	$ 289,199	$ 268,233	$ 199,897		$ 827,098	974,579	678,595
Income before taxes															$ 56,671	142,079	118,474
Deltic [Member]
Business Acquisition [Line Items]
Acres of timberland | a			530,000
Number of sawmills | Sawmill			2
Area of diversified timberland base after merger | a			1,900,000
Number of share exchanged under agreement			180.00%
Total assets acquired			$ 1,400,000
Equity consideration transferred			1,100,000
Liabilities assumed			$ 300,000
Merger-related costs																22,100	3,400
Merger related costs, professional fees																12,200	3,300
Restructuring costs, termination benefits																9,900	100
Revenue														$ 265,500
Income before taxes														$ 21,600
Non-recurring merger-related costs				$ 18,900												$ 27,600	$ 16,800
Number of shares issued upon merger | shares					22
Deltic [Member] | Special Distribution [Member]
Business Acquisition [Line Items]
Number of shares issued upon merger | shares		4.8
Business combination, estimated shares settle in non cash amount of liability | shares															4.8
Deltic [Member] | Arkansas [Member]
Business Acquisition [Line Items]
Area of diversified timberland base after merger | a			930,000
[1]	For integration and restructuring costs related to the merger with Deltic see Note 2: Merger with Deltic.

Merger with Deltic (Summary of

Merger with Deltic (Summary of Unaudited Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Combinations [Abstract]
Net sales	$ 1,013,242	$ 920,860
Net earnings attributable to PotlatchDeltic common shareholders	$ 145,685	$ 77,732
Basic earnings per share attributable to PotlatchDeltic common shareholders	$ 2.16	$ 1.15
Diluted earnings per share attributable to PotlatchDeltic common shareholders	$ 2.15	$ 1.15

Merger with Deltic (Summary o_2

Merger with Deltic (Summary of Estimated Fair Value Measurements of Assets Acquired and Liabilities Assumed) (Details) $ in Thousands	Feb. 20, 2018USD ($)
ASSETS
Cash and cash equivalents	$ 3,419
Customer receivables	12,709
Inventories	17,316
Other current assets	5,285
Real estate held for development and sale	83,000
Property, plant and equipment	260,769
Timber and timberlands	1,055,745
Mineral rights	6,236
Trade name and customer relationships intangibles	19,500
Other long-term assets	3,556
Total assets acquired	1,467,535
LIABILITIES
Accounts payable and accrued liabilities	12,615
Long-term debt	230,112
Pension and other postretirement employee benefits	36,909
Deferred tax liabilities, net	44,188
Other long-term liabilities	936
Total liabilities assumed	324,760
Net assets acquired	1,142,775
Preliminary Allocation [Member]
ASSETS
Cash and cash equivalents	3,419
Customer receivables	12,709
Inventories	17,316
Other current assets	8,276
Real estate held for development and sale	79,000
Property, plant and equipment	265,901
Timber and timberlands	1,060,000
Trade name and customer relationships intangibles	19,000
Other long-term assets	2,010
Total assets acquired	1,467,631
LIABILITIES
Accounts payable and accrued liabilities	12,604
Long-term debt	229,968
Pension and other postretirement employee benefits	36,909
Deferred tax liabilities, net	44,439
Other long-term liabilities	936
Total liabilities assumed	324,856
Net assets acquired	1,142,775
Measurement Period Adjustment [Member]
ASSETS
Other current assets	(2,991)
Real estate held for development and sale	4,000
Property, plant and equipment	(5,132)
Timber and timberlands	(4,255)
Mineral rights	6,236
Trade name and customer relationships intangibles	500
Other long-term assets	1,546
Total assets acquired	(96)
LIABILITIES
Accounts payable and accrued liabilities	11
Long-term debt	144
Deferred tax liabilities, net	(251)
Total liabilities assumed	$ (96)

Sale of Deltic MDF Facility (Na

Sale of Deltic MDF Facility (Narrative) (Details) - USD ($) $ in Thousands	Feb. 12, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 20, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Pre-tax gain on sale of facility		$ 9,176
Proceeds on sale of facility		58,793
Assets held for sale			$ 80,674
Liabilities held for sale			29,321
Deltic MDF Facility [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Reduction to deferred tax liabilities		(15,800)
Increase to income taxes payable		$ 15,800
Assets held for sale			80,700
Liabilities held for sale			29,300
Deltic MDF Facility [Member] | Revenue Bonds [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Liabilities held for sale			29,000
Deltic MDF Facility [Member] | Inventories [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets held for sale			7,700
Deltic MDF Facility [Member] | Property and Equipment [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets held for sale			72,100
Deltic MDF Facility [Member] | Customer List Intangibles [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets held for sale			$ 900
Roseburg Forest Products Co [Member] | Deltic MDF Facility [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Total sale price				$ 92,000
Cash sale price				63,000
Assumption sale price of revenue bonds				$ 29,000
Pre-tax gain on sale of facility	$ 9,200
Proceeds on sale of facility	58,800
Reduction to deferred tax liabilities	(15,800)
Increase to income taxes payable	$ 15,800

Revenue Recognition (Summary of

Revenue Recognition (Summary of Revenues by Major Product) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation Of Revenue [Line Items]
Revenues		$ 203,499	$ 226,302	$ 215,581	$ 181,716	$ 217,250	$ 289,199	$ 268,233	$ 199,897	$ 827,098	$ 974,579	$ 678,595
Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues										941,973	1,090,447	750,011
Intersegment Eliminations [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1],[2]									(114,875)	(115,868)	(71,416)
Timberlands [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues										322,693	354,950	278,199
Timberlands [Member] | Operating Segments [Member] | Northern Region [Member]
Disaggregation Of Revenue [Line Items]
Revenues										169,416	213,950	197,867
Timberlands [Member] | Operating Segments [Member] | Northern Region [Member] | Sawlogs [Member]
Disaggregation Of Revenue [Line Items]
Revenues										161,570	205,977	190,693
Timberlands [Member] | Operating Segments [Member] | Northern Region [Member] | Pulpwood [Member]
Disaggregation Of Revenue [Line Items]
Revenues										5,767	5,996	5,634
Timberlands [Member] | Operating Segments [Member] | Northern Region [Member] | Stumpage [Member]
Disaggregation Of Revenue [Line Items]
Revenues										109	176	153
Timberlands [Member] | Operating Segments [Member] | Northern Region [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Revenues										1,970	1,801	1,387
Timberlands [Member] | Operating Segments [Member] | Southern Region [Member]
Disaggregation Of Revenue [Line Items]
Revenues										153,277	141,000	80,332
Timberlands [Member] | Operating Segments [Member] | Southern Region [Member] | Sawlogs [Member]
Disaggregation Of Revenue [Line Items]
Revenues										88,048	81,460	40,993
Timberlands [Member] | Operating Segments [Member] | Southern Region [Member] | Pulpwood [Member]
Disaggregation Of Revenue [Line Items]
Revenues										53,315	48,585	34,907
Timberlands [Member] | Operating Segments [Member] | Southern Region [Member] | Stumpage [Member]
Disaggregation Of Revenue [Line Items]
Revenues										1,666	2,434	557
Timberlands [Member] | Operating Segments [Member] | Southern Region [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Revenues										10,248	8,521	3,875
Wood Products [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues										540,408	680,931	441,157
Wood Products [Member] | Operating Segments [Member] | Lumber [Member]
Disaggregation Of Revenue [Line Items]
Revenues										396,648	464,180	313,083
Wood Products [Member] | Operating Segments [Member] | Residuals and Panels [Member]
Disaggregation Of Revenue [Line Items]
Revenues										143,760	216,751	128,074
Real Estate Segment [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues										78,872	54,566	30,655
Real Estate Segment [Member] | Operating Segments [Member] | Rural Real Estate [Member]
Disaggregation Of Revenue [Line Items]
Revenues										49,675	36,024	$ 30,655
Real Estate Segment [Member] | Operating Segments [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[3]									6,834	5,690
Real Estate Segment [Member] | Operating Segments [Member] | Development Real Estate [Member]
Disaggregation Of Revenue [Line Items]
Revenues										$ 22,363	$ 12,852
[1]	Intersegment revenues represent logs sold by our Timberlands segment to our Wood Products segment.
[2]	Intersegment revenues represent logs sold by our Timberlands segment to the Wood Products segment.
[3]	Other Real Estate revenues primarily relate to the Chenal Country Club.

Revenue Recognition (Narrative)

Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue Recognition [Line Items]
Contract liabilities related to hunting and other access rights	$ 5.5	$ 4.3
Membership Initiation Fees [Member]
Revenue Recognition [Line Items]
Contract liability recognized period	10 years

Segment Information (Narrative)

Segment Information (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019SegmentCustomer	Dec. 31, 2018Customer	Dec. 31, 2017Customer
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	3
Revenue from Contract with Customer [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, customer | Customer	0	0	1
Concentration risk, percentage	10.00%	10.00%	10.00%

Segment Information (Summary Of

Segment Information (Summary Of Information By Business Segment) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues		$ 203,499	$ 226,302	$ 215,581	$ 181,716	$ 217,250	$ 289,199	$ 268,233	$ 199,897	$ 827,098	$ 974,579	$ 678,595
Adjusted EBITDDA										178,943	297,193	195,757
Basis of real estate sold										20,554	16,698	6,827
Depreciation, depletion and amortization										70,417	70,848	28,432
Interest expense, net	[1]									(30,361)	(35,227)	(27,049)
Loss on extinguishment of debt										(5,512)
Non-operating pension and other postretirement employee benefits										(3,739)	(7,648)	(6,384)
Loss on fixed assets										(865)	(725)	(204)
Gain on sale of facility										9,176
Deltic merger-related costs	[2]										(22,119)	(3,409)
Environmental charges for Avery Landing												(4,978)
Income before income taxes										56,671	142,079	118,474
Bond discount and deferred loan fees	[1]									1,688	2,313	1,480
Total depreciation, depletion and amortization										72,105	73,161	29,912
Assets		2,235,059				2,325,852				2,235,059	2,325,852	953,079
Capital Expenditures										64,102	52,307	28,062
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues										941,973	1,090,447	750,011
Depreciation, depletion and amortization										70,417	70,848	28,432
Assets		2,141,293				2,242,676				2,141,293	2,242,676	824,719
Capital Expenditures										62,785	50,560	25,930
Operating Segments [Member] | Timberlands [Member]
Segment Reporting Information [Line Items]
Revenues										322,693	354,950	278,199
Adjusted EBITDDA										133,987	169,834	126,707
Depreciation, depletion and amortization										46,601	48,201	20,476
Assets	[3]	1,655,407				1,693,162				1,655,407	1,693,162	669,288
Capital Expenditures	[4]									17,500	17,232	15,120
Operating Segments [Member] | Wood Products [Member]
Segment Reporting Information [Line Items]
Revenues										540,408	680,931	441,157
Adjusted EBITDDA										12,901	130,583	80,624
Depreciation, depletion and amortization										22,059	21,416	7,347
Assets		398,465				456,306				398,465	456,306	154,479
Capital Expenditures										37,232	27,341	10,723
Operating Segments [Member] | Real Estate Segment [Member]
Segment Reporting Information [Line Items]
Revenues										78,872	54,566	30,655
Adjusted EBITDDA										62,650	40,304	25,720
Basis of real estate sold										20,749	16,954	7,114
Depreciation, depletion and amortization										678	418	2
Assets	[5]	87,421				93,208				87,421	93,208	952
Capital Expenditures	[6]									8,053	5,987	87
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	[7],[8]									(114,875)	(115,868)	(71,416)
Adjusted EBITDDA										5,662	(5,743)	(2,992)
Basis of real estate sold										(195)	(256)	(287)
Corporate [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDDA										(36,257)	(37,785)	(34,302)
Depreciation, depletion and amortization										1,079	813	607
Assets		$ 93,766				$ 83,176				93,766	83,176	128,360
Capital Expenditures										$ 1,317	1,747	$ 2,132
Costs of Goods Sold [Member]
Segment Reporting Information [Line Items]
Inventory purchase price adjustment in cost of goods sold	[9]										$ (1,849)
[1]	Bond discounts and deferred loan fees are reported within interest expense on the Consolidated Statements of Income
[2]	For integration and restructuring costs related to the merger with Deltic see Note 2: Merger with Deltic.
[3]	We do not report rural real estate separate from Timberlands as we do not report these assets separately to management.
[4]	Does not include the acquisition of timber and timberlands, all of which were acquired by the Timberlands segment.
[5]	Real Estate assets primarily consist of real estate development acquired with the Deltic merger.
[6]	Real Estate capital expenditures include development expenditures of $7.3 million, $5.0 million and $0 for the year ended December 31, 2019, 2018 and 2017, respectively.
[7]	Intersegment revenues represent logs sold by our Timberlands segment to our Wood Products segment.
[8]	Intersegment revenues represent logs sold by our Timberlands segment to the Wood Products segment.
[9]	The effect of costs of goods sold for fair value adjustments to the carrying amounts of inventory acquired in business combinations.

Segment Information (Summary _2

Segment Information (Summary Of Information By Business Segment) (Parenthetical) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting [Abstract]
Real estate development expenditures	$ 7,254	$ 5,049	$ 0

Segment Information (Schedule o

Segment Information (Schedule of Revenues by Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 203,499	$ 226,302	$ 215,581	$ 181,716	$ 217,250	$ 289,199	$ 268,233	$ 199,897	$ 827,098	$ 974,579	$ 678,595
United States
Revenues									825,105	972,457	676,956
Canada
Revenues									128	624	481
Mexico
Revenues									$ 1,865	$ 1,498	$ 1,158

Earnings per Share (Reconciliat

Earnings per Share (Reconciliation of Number of Shares Used in Calculating Basic and Diluted Earnings per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Earnings per Share [Line Items]
Net income	$ 11,399		$ 20,565		$ 17,137		$ 6,560		$ 1,799		$ 60,336		$ 46,148		$ 14,597		$ 55,661		$ 122,880		$ 86,453
Basic weighted-average shares outstanding																	67,608		60,534		40,824
Diluted weighted-average shares outstanding																	67,743		61,814		41,227
Basic net income per share	$ 0.17	[1]	$ 0.30	[1]	$ 0.25	[1]	$ 0.10	[1]	$ 0.03	[1]	$ 0.96	[1]	$ 0.73	[1]	$ 0.29	[1]	$ 0.82	[1]	$ 2.03	[1]	$ 2.12
Diluted net income per share	$ 0.17	[1]	$ 0.30	[1]	$ 0.25	[1]	$ 0.10	[1]	$ 0.03	[1]	$ 0.93	[1]	$ 0.73	[1]	$ 0.29	[1]	$ 0.82	[1]	$ 1.99	[1]	$ 2.10
Performance shares [Member]
Earnings per Share [Line Items]
Incremental shares																	109		230		363
Restricted stock units [Member]
Earnings per Share [Line Items]
Incremental shares																	26		34		40
Stock portion of earnings and profits distribution [Member]
Earnings per Share [Line Items]
Incremental shares																			1,016
[1]	Per share amounts are computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the total computed for the year.

Earnings per Share (Narrative)

Earnings per Share (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	Feb. 14, 2020	Nov. 15, 2018	Aug. 30, 2018	Apr. 26, 2016	Feb. 28, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings per Share [Line Items]
Total anti-dilutive shares excluded from the calculation (in shares)						49,500	42,000	250
Dividend distribution, cash paid						$ 107,722	$ 102,333	$ 61,931
Number of shares repurchased						686,240	0	0
Stock repurchase program, period				24 months
Number of shares repurchased, cost						$ 25,173
Stock repurchase program, remaining amount						$ 74,800
Unsettled repurchase shares						0	0
Maximum [Member]
Earnings per Share [Line Items]
Stock repurchase program, authorized amount			$ 100,000	$ 60,000
Deltic [Member]
Earnings per Share [Line Items]
Number of shares issued upon merger					22,000,000
Deltic [Member] | Subsequent Event [Member]
Earnings per Share [Line Items]
Dividend payable, per share	$ 0.40
Distribution, date of declared	Feb. 14, 2020
Distribution, date of record	Mar. 31, 2020
Deltic [Member] | Special Distribution [Member]
Earnings per Share [Line Items]
Number of shares issued upon merger		4,800,000
Distribution payable			$ 222,000
Dividend payable, per share			$ 3.54
Distribution, date of declared			Aug. 30, 2018
Distribution, date to be paid			Nov. 15, 2018
Distribution, date of record			Sep. 27, 2018
Dividend distribution, cash paid		$ 44,400

Inventories (Schedule of Invent

Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Logs	$ 33,313	$ 37,303
Lumber, plywood and veneer	31,639	27,420
Materials and supplies	12,831	11,310
Inventories gross	77,783	76,033
Less: LIFO reserve	(12,002)	(15,228)	$ (10,900)
Total inventories	$ 65,781	$ 60,805

Inventories (Narrative) (Detail

Inventories (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Last-In, First-Out Reserve	$ 12,002	$ 15,228	$ 10,900

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 498,113	$ 472,695
Less: accumulated depreciation	(211,730)	(200,502)
Total property, plant and equipment, net	286,383	272,193
Land
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	7,875	6,078
Buildings and Improvements [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 123,342	92,326
Buildings and Improvements [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Buildings and Improvements [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 360,570	364,101
Machinery and Equipment | Minimum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	2 years
Machinery and Equipment | Maximum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	25 years
Construction in Progress
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 6,326	$ 10,190

Property, Plant and Equipment_3

Property, Plant and Equipment (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Depreciation	$ 23.9	$ 22.8	$ 8.1
Capitalized interest	$ 0.2

Timber and Timberlands (Schedul

Timber and Timberlands (Schedule of Timber and Timberlands) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Timber And Timberlands [Abstract]
Timber and timberlands	$ 1,554,882	$ 1,590,997
Logging roads	83,781	81,818
Total timber and timberlands, net	$ 1,638,663	$ 1,672,815

Timber and Timberlands (Narrati

Timber and Timberlands (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Timber And Timberlands [Abstract]
Depletion from Company Owned Lands	$ 41.7	$ 43.9	$ 17
Amortization of Logging Roads	3.6	$ 3.4	$ 3.2
Future payments due under timber cutting contracts	$ 21.8

Intangible Assets (Schedule of

Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Indefinite-Lived and Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 10,200	$ 10,200
Long-lived intangible assets	8,398	9,300
Accumulated amortization	(1,549)	(770)
Long-lived intangible assets, net	6,849	7,628
Total intangible assets, net	$ 17,049	17,828
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Indefinite-Lived and Finite-Lived Intangible Assets [Line Items]
Assets held for sale		$ (902)

Intangible Assets (Narrative) (

Intangible Assets (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense for intangibles	$ 800,000	$ 800,000	$ 0
Intangible assets estimated amortization expense, year one	800,000
Intangible assets estimated amortization expense, year two	800,000
Intangible assets estimated amortization expense, year three	800,000
Intangible assets estimated amortization expense, year four	800,000
Intangible assets estimated amortization expense, year five	$ 800,000

Other Assets (Schedule of Other

Other Assets (Schedule of Other Current Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Assets [Abstract]
Real estate held for sale	$ 10,974	$ 10,322
Prepaid expenses	3,097	3,194
Tax receivables	1,341	6,659
Other receivables	4,771	2,500
Total other current assets	$ 20,183	$ 22,675

Other Assets (Schedule of Oth_2

Other Assets (Schedule of Other Long-term Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Assets Noncurrent [Abstract]
Operating leases	$ 15,772
Mineral rights	5,254	$ 5,735
Investment in company owned life insurance (COLI), net	4,157	3,104
Real estate development costs	3,776	2,649
Debt issuance costs	1,846	2,405
Interest rate swaps	1,601	1,510
Restricted cash	944	2,802
Other	1,940	3,076
Total other long-term assets	$ 35,290	$ 21,281

Accounts Payable and Accrued _3

Accounts Payable and Accrued Liabilities (Schedule of Accounts Payable and Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts Payable And Accrued Liabilities Current [Abstract]
Accrued payroll and benefits	$ 12,920	$ 20,130
Accounts payable	12,734	12,073
Accrued interest	6,946	8,642
Accrued taxes	6,638	7,389
Deferred revenue	5,514	4,282
Operating lease liabilities	4,998
Other current liabilities	10,827	8,477
Total accounts payable and accrued liabilities	$ 60,577	$ 60,993

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Balance Sheet Information Related Leases (Details) $ in Thousands	Dec. 31, 2019USD ($)
ASSETS
Operating lease assets	$ 15,772
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent
Finance lease assets	$ 2,360	[1]
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet
Total lease assets	$ 18,132
Current liabilities:
Operating lease liabilities	$ 4,998
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Finance lease liabilities	$ 644
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Noncurrent
Operating lease liabilities	$ 10,775
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Finance lease liabilities	$ 1,703
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Total lease liabilities	$ 18,120
[1]	Finance lease assets are presented net of accumulated amortization of $0.3 million as of December 31, 2019.

Leases - Schedule of Suppleme_2

Leases - Schedule of Supplemental Balance Sheet Information Related Leases (Parentheticals) (Details) $ in Millions	Dec. 31, 2019USD ($)
Leases [Abstract]
Accumulated amortization of finance lease assets	$ 0.3

Leases - Schedule of Weighted A

Leases - Schedule of Weighted Average Remaining Terms and Discount Rate (Details)	Dec. 31, 2019
Weighted-average remaining terms (years)
Operating leases	4 years 2 months 19 days
Finance leases	3 years 9 months 29 days
Weighted-average discount rate
Operating leases	4.17%
Finance leases	3.54%

Leases - Schedule of Components

Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Operating lease costs	[1]	$ 5,938	$ 4,989	$ 4,519
Finance lease costs
Amortization of leased assets		269
Interest on lease assets		40
Net lease costs		$ 6,247	$ 4,989	$ 4,519
[1]	Excludes short-term leases and variable lease costs, which are immaterial.

Leases - Schedule of Suppleme_3

Leases - Schedule of Supplemental Cash Flow Information Related Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 5,963
Operating cash flows for finance leases	40
Financing cash flows for finance leases	283
Leased assets exchanged for new lease liabilities:
Operating leases	7,135
Finance leases	$ 2,630

Leases - Schedule of Maturity o

Leases - Schedule of Maturity of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2019USD ($)
Operating Leases
2020	$ 5,549
2021	4,454
2022	2,756
2023	1,821
2024	965
After 2024	1,689
Total lease payments	17,234
Less: interest	1,461
Present value of lease liabilities	15,773
Finance Leases
2020	716
2021	696
2022	611
2023	358
2024	128
Total lease payments	2,509
Less: interest	162
Present value of lease liabilities	$ 2,347

Debt (Schedule of Long-Term Deb

Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term principal	$ 762,235		$ 762,235
Debt issuance costs	(2,086)	$ (500)	(2,143)
Unamortized discounts	(3,680)		(4,545)
Total long-term debt	756,469		755,364
Less current portion of long-term debt	(45,974)		(39,973)
Long-term debt	710,495		715,391
Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Debt instrument			(183)
Variable Rate Term Loans [Member]
Debt Instrument [Line Items]
Long-term principal	397,500		247,500
Fixed Rate Term Loans [Member]
Debt Instrument [Line Items]
Long-term principal	296,000		296,000
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term principal			150,000
Revenue Bonds [Member]
Debt Instrument [Line Items]
Long-term principal	65,735		65,735
Medium Term Notes [Member]
Debt Instrument [Line Items]
Long-term principal	$ 3,000		$ 3,000

Debt (Schedule of Long-Term D_2

Debt (Schedule of Long-Term Debt) (Parenthetical) (Details)	1 Months Ended	12 Months Ended
	Jan. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2009
Debt Instrument [Line Items]
Interest Rate	4.56%	3.17%
Debt instrument maturity date	2029
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.85%	1.00%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.875%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.70%
Senior Notes [Member]
Debt Instrument [Line Items]
Interest Rate			7.50%	7.50%
Variable Rate Term Loans [Member]
Debt Instrument [Line Items]
Debt instrument maturity start date		2020
Debt instrument maturity end date		2029
Variable Rate Term Loans [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.85%
Interest rate variable		1.69%
Variable Rate Term Loans [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.15%
Interest rate variable		2.10%
Fixed Rate Term Loans [Member]
Debt Instrument [Line Items]
Debt instrument maturity start date		2022
Debt instrument maturity end date		2025
Fixed Rate Term Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate		3.70%
Fixed Rate Term Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate		4.64%
Revenue Bonds [Member]
Debt Instrument [Line Items]
Interest Rate		2.75%
Debt instrument maturity date		2024
Medium Term Notes [Member]
Debt Instrument [Line Items]
Interest Rate		8.75%
Debt instrument maturity date		2022

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Mar. 22, 2018
Debt Instrument [Line Items]
Unamortized discounts		$ 3,680	$ 4,545
Debt instrument maturity date	2029
Term Loans [Member]
Debt Instrument [Line Items]
Unamortized discounts		3,700
Long-term Debt, Gross		$ 100,000		$ 100,000
Debt instrument maturity date		2025
Deltic [Member] | Term Loans [Member]
Debt Instrument [Line Items]
Unamortized discounts		$ 4,900
Revenue Bonds [Member] | Bond Maturing 2027 [Member]
Debt Instrument [Line Items]
Debt instrument held for sale			$ 29,000

Debt -Term Loans, Medium Term N

Debt -Term Loans, Medium Term Notes and Revenue Bonds - (Narrative) (Details) - USD ($) $ in Thousands	Mar. 22, 2018	Jan. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2009	Sep. 30, 2019
Debt Instrument [Line Items]
Repayment of credit facility				$ 100,000
Proceeds from Issuance of Debt			$ 40,000
Interest Rate		4.56%	3.17%
Long-term Debt, refinancing amount		$ 150,000
Debt instrument maturity date		2029
Debt Instrument, outstanding amount including redemption premium		$ 4,900
Debt Instrument, lender fee		$ 500	$ 2,086	2,143
Term loan maturity period			2019-12
Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross						$ 40,000
Amended Term Loan Agreement [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding			$ 693,500
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.85%	1.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding			$ 100,000
Deltic [Member]
Debt Instrument [Line Items]
Repayment of credit facility				$ 106,000
Deltic [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Repayment of credit facility			100,000
Term Loans [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 100,000		$ 100,000
Debt instrument maturity date			2025
Term Loans [Member] | Deltic [Member]
Debt Instrument [Line Items]
Repayment of credit facility	106,000
Term Loans [Member] | Debt Assumed [Member] | Deltic [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 100,000
Senior Notes [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt					$ 150,000
Interest Rate				7.50%	7.50%

Debt (Scheduled Payments Due on

Debt (Scheduled Payments Due on Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Long Term Debt By Maturity [Abstract]
2020	$ 46,000
2021	40,000
2022	43,000
2023	40,000
2024	175,735
Thereafter	417,500
Debt Instrument, Face Amount	$ 762,235	$ 762,235

Debt - Credit Agreement - (Narr

Debt - Credit Agreement - (Narrative) (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jan. 31, 2019	Dec. 31, 2019	Feb. 14, 2018	Dec. 31, 2014
Debt Instrument [Line Items]
Unused Capacity, Commitment Fee Percentage		0.20%
Federal Fund Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.50%
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.85%	1.00%
Additional Applicable Rate Added to Base Rate, Minimum		1.30%
Base Rate [Member]
Debt Instrument [Line Items]
Additional Applicable Rate Added to Base Rate, Minimum		0.30%
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.875%
Minimum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.00%
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.70%
Maximum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.70%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum Borrowing Capacity			$ 380,000,000
Amount available to increase borrowing capacity			420,000,000
Revolving line of credit borrowings		$ 0
Line of credit facility, amount outstanding		100,000,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum Borrowing Capacity			$ 75,000,000
Line of credit facility, amount outstanding		$ 1,000,000
Swing Line Loan [Member]
Debt Instrument [Line Items]
Maximum Borrowing Capacity				$ 25,000,000

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) $ in Thousands, MMcf in Millions	1 Months Ended		12 Months Ended
	Dec. 31, 2017USD ($)	Apr. 30, 2017USD ($)MMcf	Dec. 31, 2019USD ($)Derivative	Sep. 30, 2019USD ($)	Jan. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Mar. 22, 2018USD ($)
Derivatives Fair Value [Line Items]
Net losses expected to be reclassified into earnings in the next twelve months			$ 3,700
Term Loans [Member]
Derivatives Fair Value [Line Items]
Term loan debt			100,000				$ 100,000
Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Term loan debt				$ 40,000
Notional amounts						$ 14,300
Fair value hedges			$ 0
Interest Rate Swaps [Member] | Senior notes [Member]
Derivatives Fair Value [Line Items]
Notional amounts associated with senior notes	$ 50,000
Derivative, termination year	2017-12
Termination cost	$ 400
Interest Rate Swaps [Member] | Cash Flow Hedging [Member]
Derivatives Fair Value [Line Items]
Number of interest rate swap agreements | Derivative			6
Swaps fixed interest rate					4.56%
LIBOR variable interest rate					1.85%
Interest Rate Swaps [Member] | Cash Flow Hedging [Member] | Minimum [Member]
Derivatives Fair Value [Line Items]
Swaps fixed interest rate			3.17%
LIBOR variable interest rate			1.85%
Interest Rate Swaps [Member] | Cash Flow Hedging [Member] | Maximum [Member]
Derivatives Fair Value [Line Items]
Swaps fixed interest rate			4.82%
LIBOR variable interest rate			2.15%
Interest Rate Swaps [Member] | Cash Flow Hedging [Member] | Term Loans [Member]
Derivatives Fair Value [Line Items]
Term loan debt			$ 397,500
Interest Rate Swaps [Member] | Cash Flow Hedging [Member] | Senior notes [Member]
Derivatives Fair Value [Line Items]
Notional amounts associated with senior notes					$ 150,000
Interest Rate Swaps [Member] | Cash Flow Hedging [Member] | Term Loans Maturing in December 2019 [Member]
Derivatives Fair Value [Line Items]
Term loan debt			$ 40,000
Swaps fixed interest rate				3.17%
LIBOR variable interest rate				1.85%
Notional amounts associated with senior notes				$ 40,000
Commodity Contract [Member] | Swap [Member] | Derivatives not designated as Hedging Instrument [Member]
Derivatives Fair Value [Line Items]
Volume of southern yellow pine in lumber price swap | MMcf		36
Lumber price swap expiration date		Dec. 31, 2017
Realized gain on lumber price swap		$ 1,100

Derivative Instruments (Fair Va

Derivative Instruments (Fair Value of Cash Flow Derivative Instruments) (Details) - Designated as Hedging Instrument [Member] - Cash Flow Hedging [Member] - Interest rate contracts [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Noncurrent Assets [Member]
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 1,601	$ 1,510
Other Long-term Obligations [Member]
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 22,398	$ 2,888

Derivative Instruments (Effect

Derivative Instruments (Effect of Derivatives on Consolidated Statements of Income) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense, net	[1]	$ 30,361	$ 35,227	$ 27,049
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives designated in fair value hedging		(165)	(191)	413
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest rate contracts [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives designated in fair value hedging	[2]		(191)	413
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest rate contracts [Member] | Debt Extinguishment [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives designated in fair value hedging		(165)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss recognized in other comprehensive income, net of tax		(19,824)	(3,062)	(145)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest rate contracts [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss reclassified from accumulated other comprehensive loss	[2]	$ (1,384)	$ (647)	(149)
Derivatives not designated as Hedging Instrument [Member] | Lumber price contracts [Member] | Gain on Lumber Hedge [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain on lumber price swap				$ 1,088
[1]	Bond discounts and deferred loan fees are reported within interest expense on the Consolidated Statements of Income
[2]	Consolidated Statements of Cash Flows

Fair Value Measurements (Carryi

Fair Value Measurements (Carrying Amounts and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Carrying Amount [Member] | Level 1 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash, cash equivalents and restricted cash		$ 84,254	$ 79,441
Carrying Amount [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion	[1]	(758,555)	(786,690)
Carrying Amount [Member] | Level 2 [Member] | Interest rate contracts [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative assets		1,601	1,510
Derivative liabilities related to interest rate swaps		(22,398)	(2,888)
Carrying Amount [Member] | Level 2 [Member] | Term Loans [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion		(689,820)	(539,169)
Carrying Amount [Member] | Level 2 [Member] | Senior notes [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion			(149,786)
Carrying Amount [Member] | Level 2 [Member] | Revenue bonds [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion		(65,735)	(94,735)
Carrying Amount [Member] | Level 2 [Member] | Medium-term notes [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion		(3,000)	(3,000)
Carrying Amount [Member] | Level 3 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Company owned life insurance		4,157	3,104
Fair Value [Member] | Level 1 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash, cash equivalents and restricted cash		84,254	79,441
Fair Value [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion	[1]	(775,117)	(789,928)
Fair Value [Member] | Level 2 [Member] | Interest rate contracts [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative assets		1,601	1,510
Derivative liabilities related to interest rate swaps		(22,398)	(2,888)
Fair Value [Member] | Level 2 [Member] | Term Loans [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion		(703,437)	(539,037)
Fair Value [Member] | Level 2 [Member] | Senior notes [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion			(154,328)
Fair Value [Member] | Level 2 [Member] | Revenue bonds [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion		(68,200)	(93,144)
Fair Value [Member] | Level 2 [Member] | Medium-term notes [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion		(3,480)	(3,419)
Fair Value [Member] | Level 3 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Company owned life insurance		$ 4,157	$ 3,104
[1]	The carrying amount of long-term debt includes principal and unamortized discounts. At December 31, 2018, long-term debt in the above table included the $29.0 million of revenue bonds for the MDF facility which was classified as held for sale. See Note 3: Sale of Deltic MDF Facility

Fair Value Measurements (Carr_2

Fair Value Measurements (Carrying Amounts and Estimated Fair Values of Financial Instruments) (Parenthetical) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Liabilities held for sale	$ 29,321
Deltic MDF Facility [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Liabilities held for sale	29,300
Deltic MDF Facility [Member] | Revenue bonds [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Liabilities held for sale	$ 29,000

Equity-Based Compensation Pla_3

Equity-Based Compensation Plans (Narrative) (Details) - USD ($) $ in Thousands	May 06, 2019	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Unit, Vested, Issuance Deferred		86,149
Qualifying terminations, recognition of expense			$ 1,812
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares reserved for future issuance		151,856
Performance stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share award granted under stock incentive plan, performance period		3 years
Unrecognized compensation cost		$ 5,100
Weighted average period (in years)		1 year 8 months 12 days
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		$ 3,000
Weighted average period (in years)		1 year 7 months 6 days
Replacement Restricted Stock Unit Awards [Member] | Deltic [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period		4 years
Qualifying terminations, accelerated vesting shares			35,000
Qualifying terminations, recognition of expense			$ 1,800
Minimum [Member] | Performance stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Actually Issued, as a Percent of the Amount Subject to the Performance Share Award		0.00%
Minimum [Member] | Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period		1 year
Maximum [Member] | Performance stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Actually Issued, as a Percent of the Amount Subject to the Performance Share Award		200.00%
Maximum [Member] | Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period		3 years
2019 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized	1,200,000
Long-Term Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future use		1,400,000

Equity-Based Compensation Pla_4

Equity-Based Compensation Plans (Details of Equity-Based Compensation Expense and Related Income Tax Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	$ 7,272	$ 8,206	$ 5,379
Deferred compensation stock equivalent units expense	72	213	657
Accelerated share-based termination benefits in connection with the merger		1,812
Total tax benefit recognized for shared-based payment awards	314	332	379
Performance stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	4,605	4,157	3,582
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	$ 2,595	$ 2,024	$ 1,140

Equity-Based Compensation Pla_5

Equity-Based Compensation Plans (Fair Value of Performance Share Awards) (Details) - Performance stock awards [Member] - $ / shares		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price as of valuation date (in dollars per share)		$ 35.01	$ 54	$ 43.60
Risk-free rate		2.47%	2.46%	1.61%
Expected volatility		25.15%	23.74%	24.22%
Expected dividend yield	[1]		2.96%	3.44%
Expected term (years)		3 years	3 years	3 years
Fair value of a performance share		$ 37.87	$ 75.37	$ 53.85
[1]	For 2019 assumes full dividend reinvestment

Equity-Based Compensation Pla_6

Equity-Based Compensation Plans (Summary Of Outstanding Performance Shares/Restricted Stock Units) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Performance stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested shares outstanding at January 1, Shares	142,238	200,631	203,788
Granted (in shares)	142,066	67,747	78,033
Vested (in shares)	(75,048)	(121,058)	(78,129)
Forfeited (in shares)	(13,249)	(5,082)	(3,061)
Nonvested shares outstanding at December 31, Shares	196,007	142,238	200,631
Total grant date fair value of awards vested during the year	$ 4,041	$ 3,634	$ 2,868
Total fair value of awards vested during the year	3,561	6,397	7,797
Aggregate intrinsic value	$ 8,481	$ 4,500	$ 10,011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested shares outstanding at January 1, Weighted Average Grant Date Fair Value (in dollars per share)	$ 63.91	$ 39.19	$ 32.59
Granted, Weighted Average Exercise Price (in dollars per share)	37.87	75.37	53.85
Vested, Weighted Average Grant Date Fair Value (in dollars per share)	53.85	30.02	36.71
Forfeited, Weighted Average Grant Date Fair Value (in dollars per share)	45.35	47.90	34.68
Nonvested shares outstanding at December 31, Weighted Average Grant Date Fair Value (in dollars per share)	$ 50.15	$ 63.91	$ 39.19
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested shares outstanding at January 1, Shares	72,020	67,871	71,420
Granted (in shares)	104,488	49,193	26,507
Vested (in shares)	(43,102)	(41,350)	(29,039)
Forfeited (in shares)	(5,935)	(3,694)	(1,017)
Nonvested shares outstanding at December 31, Shares	127,471	72,020	67,871
Total grant date fair value of awards vested during the year	$ 1,961	$ 1,089	$ 1,151
Total fair value of awards vested during the year	1,771	1,328	1,442
Aggregate intrinsic value	$ 5,516	$ 2,279	$ 3,387
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested shares outstanding at January 1, Weighted Average Grant Date Fair Value (in dollars per share)	$ 47.66	$ 32.87	$ 31.61
Granted, Weighted Average Exercise Price (in dollars per share)	36.80	49.96	43.64
Vested, Weighted Average Grant Date Fair Value (in dollars per share)	45.51	26.33	39.65
Forfeited, Weighted Average Grant Date Fair Value (in dollars per share)	40.26	45.36	31.63
Nonvested shares outstanding at December 31, Weighted Average Grant Date Fair Value (in dollars per share)	$ 39.83	$ 47.66	$ 32.87

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Statutory Federal Income Tax Rate	21.00%	35.00%	35.00%
Reduction in net deferred tax assets including valuation allowance			$ 10,500,000
Net tax benefit	$ (1,010,000)	$ (19,199,000)	(32,021,000)
Valuation allowance	395,000	790,000
Unrecognized tax benefits that would impact effective tax rate	0
Unrecognized tax benefits	0	564,000	$ 564,000
Idaho [Member]
Income Taxes [Line Items]
Investment Tax Credits	2,800,000
Valuation allowance	$ 400,000
Earliest Tax Year [Member] | Idaho [Member]
Income Taxes [Line Items]
Idaho Investment Tax Credits expiration year	2022
Latest Tax Year [Member] | Idaho [Member]
Income Taxes [Line Items]
Idaho Investment Tax Credits expiration year	2033
Federal [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards	$ 0
State and Local [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards	0
Pension Plans [Member] | Qualified Plan [Member]
Income Taxes [Line Items]
Net tax benefit		$ 5,000,000
Deltic MDF Facility [Member]
Income Taxes [Line Items]
Reduction to deferred tax liabilities	(15,800,000)
Increase to income taxes payable	$ 15,800,000

Income Taxes (Schedule of Incom

Income Taxes (Schedule of Income Tax Provision (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Current	$ 12,055	$ 7,038	$ 16,657
Deferred	(11,082)	11,370	14,325
Net operating loss carryforwards	37	791	1,039
Income tax provision	$ 1,010	$ 19,199	$ 32,021

Income Taxes (Schedule of Recon

Income Taxes (Schedule of Reconciliation of Income Tax Provision (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax	$ 11,901	$ 29,837	$ 41,466
REIT income not subject to federal income tax	(11,285)	(8,773)	(20,651)
U.S. tax rate change on deferred tax assets and liabilities			10,528
Pension contribution deducted at higher tax rate		(5,665)
Change in valuation allowance	(395)		140
State income taxes, net of federal income tax	903	3,712	2,608
Domestic production activities deduction			(1,511)
Permanent book-tax differences	(793)	(771)	(252)
Research and development credits			(294)
Other items, net	679	859	(13)
Income tax provision	$ 1,010	$ 19,199	$ 32,021
Effective tax rate	1.80%	13.50%	27.00%

Income Taxes (Schedule of Compo

Income Taxes (Schedule of Components of Deferred Income Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Pension and other postretirement employee benefits	$ 32,110	$ 30,523
Inventories	754	601
Tax credits	2,190	2,688
Nondeductible accruals	815	1,039
Incentive compensation	1,044	1,000
Employee benefits	1,316	1,452
Other	1,296	320
Total deferred tax assets	39,525	37,623
Valuation allowance	(395)	(790)
Deferred tax assets, net of valuation allowance	39,130	36,833
Timber and timberlands, net	(965)	(1,025)
Property, plant and equipment, net	(50,901)	(58,909)
Intangible assets, net	(3,778)	(4,134)
Real estate development	(1,402)	(2,035)
Other	(2,249)	(2,739)
Total deferred tax liabilities	(59,295)	(68,842)
Deferred tax liabilities, net	$ (20,165)	$ (32,009)

Income Taxes (Summary of Tax Ye

Income Taxes (Summary of Tax Years Subject to Examination by Major Taxing Jurisdictions) (Details)	12 Months Ended
	Dec. 31, 2019
Federal [Member] | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2016
Federal [Member] | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2019
State and Local [Member] | Arkansas [Member] | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2016
State and Local [Member] | Arkansas [Member] | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2019
State and Local [Member] | Idaho [Member] | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2016
State and Local [Member] | Idaho [Member] | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2019
State and Local [Member] | Michigan [Member] | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2015
State and Local [Member] | Michigan [Member] | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2019
State and Local [Member] | Minnesota [Member] | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2015
State and Local [Member] | Minnesota [Member] | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2019

Income Taxes (Summary of Reconc

Income Taxes (Summary of Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Balance at January 1	$ 564	$ 564
Additions for tax positions of prior years	0	0
Reduction for tax positions of prior years	(564)	0
Balance at December 31	$ 0	$ 564

Savings Plans, Pension Plans _3

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Contributions by employer	$ 3,900,000	$ 3,700,000	$ 2,400,000
Accumulated benefit obligation	458,100,000	417,400,000
Funding of pension and other postretirement benefit plans	$ 5,678,000	57,580,000	$ 10,638,000
Expected return on plan assets	5.75%
Expected increase in net periodic cost due to 25 basis point decrease in pension discount rate	$ 1,100,000
Expected increase in projected benefit obligation due to 25 basis point decrease in pension discount rate	13,600,000
Expected increase in net periodic cost due to 25 basis point decrease in the assumption for expected return on plan assets	900,000
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments in Level 3	0	0
Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension benefit contributions, voluntary		$ 44,000,000
Non-qualified pension plan and other postretirement employee benefit, estimated payments in next fiscal year	$ 4,400,000
Accumulated Other Comprehensive Loss [Member]
Defined Benefit Plan Disclosure [Line Items]
Decrease in accumulated postretirement benefit obligations				$ 76,700,000
Management Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Annual incentive plan, employee permitted minimum defer percentage	50.00%
Annual incentive plan, employee permitted maximum defer percentage	100.00%
Management Deferred Compensation Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Basic salary defer percentage	50.00%
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated net loss to be amortized from Accumulated Other Comprehensive Loss into Net Periodic Benefit Cost	$ 17,000,000
Estimated prior service cost to be amortized from Accumulated Other Comprehensive Loss into Net Periodic Benefit Cost	100,000
Non-qualified pension plan and other postretirement employee benefit, estimated payments in next fiscal year	30,769,000
Pension Plans [Member] | Nonqualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-qualified pension plan and other postretirement employee benefit, estimated payments in next fiscal year	2,200,000
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated net loss to be amortized from Accumulated Other Comprehensive Loss into Net Periodic Benefit Cost	1,700,000
Estimated prior service cost to be amortized from Accumulated Other Comprehensive Loss into Net Periodic Benefit Cost	1,300,000
Non-qualified pension plan and other postretirement employee benefit, estimated payments in next fiscal year	4,548,000
Other Postretirement Benefit Plans [Member] | Nonqualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-qualified pension plan and other postretirement employee benefit, estimated payments in next fiscal year	$ 4,500,000
Non Deltic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next fiscal year	7.51%
Defined Benefit Plan, Assumption Health Care Cost Trend Rate for Next Fiscal Year	4.50%
Deltic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next fiscal year	7.18%
Defined Benefit Plan, Assumption Health Care Cost Trend Rate for Next Fiscal Year	4.50%

Savings Plans, Pension Plans _4

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Change in Benefit Obligation, Plan Assets and Funded Status for Company-Sponsored Benefit Plans and Obligations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amounts recognized in the consolidated balance sheets [Abstract]
Noncurrent liabilities	$ (115,463)	$ (110,659)
Pension Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	(427,909)	(392,371)
Service cost	(7,767)	(8,454)	$ (6,753)
Interest cost	(18,465)	(16,992)	(16,096)
Actuarial (loss) gain	(53,446)	20,445
Benefits paid	33,350	31,530
Plan acquisitions		(62,067)
Benefit obligation at end of year	(474,237)	(427,909)	(392,371)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	351,285	313,862
Actual return (loss) on plan assets	78,448	(23,745)
Employer contributions and benefit payments	2,085	53,998
Benefits paid	(33,350)	(31,530)
Plan acquisitions		38,700
Fair value of plan assets at end of year	398,468	351,285	313,862
Amounts recognized in the consolidated balance sheets [Abstract]
Current liabilities	(2,152)	(2,121)
Noncurrent liabilities	(73,617)	(74,503)
Funded status	(75,769)	(76,624)
OPEB [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	(40,032)	(30,349)
Service cost	(371)	(341)	(14)
Interest cost	(1,588)	(1,482)	(1,262)
Actuarial (loss) gain	(7,997)	2,100
Benefits paid	3,593	3,582
Plan acquisitions		(13,542)
Benefit obligation at end of year	(46,395)	(40,032)	$ (30,349)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Employer contributions and benefit payments	3,593	3,582
Benefits paid	(3,593)	(3,582)
Amounts recognized in the consolidated balance sheets [Abstract]
Current liabilities	(4,549)	(3,876)
Noncurrent liabilities	(41,846)	(36,156)
Funded status	$ (46,395)	$ (40,032)

Savings Plans, Pension Plans _5

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Long-Term Asset Allocation Ranges) (Details) - Pension Plans [Member]	Dec. 31, 2019
Global Equities [Member] | Minimum [Member]
Long-term asset allocation	26.00%
Global Equities [Member] | Maximum [Member]
Long-term asset allocation	38.00%
Fixed Income Securities [Member] | Minimum [Member]
Long-term asset allocation	44.00%
Fixed Income Securities [Member] | Maximum [Member]
Long-term asset allocation	64.00%
Alternative Securities [Member] | Minimum [Member]
Long-term asset allocation	10.00%
Alternative Securities [Member] | Maximum [Member]
Long-term asset allocation	16.00%
Cash and Cash Equivalents [Member] | Minimum [Member]
Long-term asset allocation	0.00%
Cash and Cash Equivalents [Member] | Maximum [Member]
Long-term asset allocation	5.00%

Savings Plans, Pension Plans _6

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Actual Plan Asset Allocations of the Pension Benefit Plans' Assets) (Details) - Pension Plans [Member]	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Global Equities [Member]
Defined Benefit Plan, Actual Plan Asset Allocations	32.00%	30.00%
Fixed Income Securities [Member]
Defined Benefit Plan, Actual Plan Asset Allocations	54.00%	58.00%
Other (Includes Cash and Cash Equivalents and Alternatives) [Member]
Defined Benefit Plan, Actual Plan Asset Allocations	14.00%	12.00%

Savings Plans, Pension Plans _7

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Fair Value Measurements) (Details) - Pension Plans [Member] - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value of Plan Assets		$ 398,468	$ 351,285	$ 313,862
Cash and Cash Equivalents [Member]
Fair Value of Plan Assets		6,671	4,120
Global Equity Securities [Member]
Fair Value of Plan Assets	[1]	127,688
Fixed Income Securities [Member]
Fair Value of Plan Assets	[2]	214,018	204,072
Alternative Securities [Member]
Fair Value of Plan Assets	[3]	50,091	38,412
Domestic Equity Securities [Member]
Fair Value of Plan Assets	[4]		54,699
International Equity Securities [Member]
Fair Value of Plan Assets	[5]		21,848
Emerging Markets [Member]
Fair Value of Plan Assets	[6]		28,134
Level 1 [Member]
Fair Value of Plan Assets		357,914	246,416
Level 1 [Member] | Cash and Cash Equivalents [Member]
Fair Value of Plan Assets		6,671	4,120
Level 1 [Member] | Global Equity Securities [Member]
Fair Value of Plan Assets	[1]	127,688
Level 1 [Member] | Fixed Income Securities [Member]
Fair Value of Plan Assets	[2]	173,464	204,072
Level 1 [Member] | Alternative Securities [Member]
Fair Value of Plan Assets	[3]	50,091
Level 1 [Member] | Domestic Equity Securities [Member]
Fair Value of Plan Assets	[4]		31,315
Level 1 [Member] | Emerging Markets [Member]
Fair Value of Plan Assets	[6]		6,909
Level 2 [Member]
Fair Value of Plan Assets		40,554	104,869
Level 2 [Member] | Fixed Income Securities [Member]
Fair Value of Plan Assets	[2]	$ 40,554
Level 2 [Member] | Alternative Securities [Member]
Fair Value of Plan Assets	[3]		38,412
Level 2 [Member] | Domestic Equity Securities [Member]
Fair Value of Plan Assets	[4]		23,384
Level 2 [Member] | International Equity Securities [Member]
Fair Value of Plan Assets	[5]		21,848
Level 2 [Member] | Emerging Markets [Member]
Fair Value of Plan Assets	[6]		$ 21,225
[1]	Level 1 assets are international and domestic managed investments that track the MSCI All-Country World Index.
[2]	Level 1 assets are investments in a diversified portfolio of fixed income instruments of varying maturities representing corporates, U.S. treasuries, municipals and futures. Level 2 assets are thinly traded investments in a diversified portfolio of fixed income instruments of varying maturities representing mostly corporates securities.  Both Level 1 & Level 2 investments track the Bloomberg Barclay’s Long-term Credit Index.
[3]	Level 1 assets are long-term investment funds which are invested in tangible assets and real asset companies such as, infrastructure, natural resources and timber. Level 2 assets are collective investments in inflation-indexed bonds, securities of real estate companies, commodity index-linked notes, fixed income securities, foreign currencies, securities of natural resource companies, master limited partnerships, publicly listed infrastructure companies, floating-rate debt, securities of global agriculture companies and securities of global timber companies.
[4]	Level 1 assets are managed investments in the U.S., small/mid-cap equities that track the Russell 2500 Growth index or Russell 2500 Value index. Level 2 assets are collective investments, which are invested in U.S. large-cap equities that track the S&P 500.
[5]	Level 2 assets are collective investments in equity funds of developed markets outside of the United States and Canada that track the MSCI EAFE Value index or MSCI EAFE Growth index.
[6]	Level 1 assets are mutual funds which are invested in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index. Level 2 assets are collective investments in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index.

Savings Plans, Pension Plans _8

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Pre-Tax Components Of Net Periodic Cost (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7,767	$ 8,454	$ 6,753
Interest cost	18,465	16,992	16,096
Expected return on plan assets	(22,190)	(20,035)	(18,406)
Amortization of prior service cost (credit)	211	186	288
Amortization of actuarial loss	13,497	16,589	14,484
Net periodic cost (benefit)	17,750	22,186	19,215
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	371	341	14
Interest cost	1,588	1,482	1,262
Amortization of prior service cost (credit)	(8,844)	(8,877)	(8,877)
Amortization of actuarial loss	1,012	1,311	1,537
Net periodic cost (benefit)	$ (5,873)	$ (5,743)	$ (6,064)

Savings Plans, Pension Plans _9

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Amounts Recorded in AOCI on Consolidated Balance Sheets, Not Recognized as Components of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Pension Plans [Member]
Net loss	$ 116,780	$ 128,849
Prior service cost (credit)	248	404
Net amount recognized	117,028	129,253
OPEB [Member]
Net loss	12,437	7,269
Prior service cost (credit)	(2,106)	(8,651)
Net amount recognized	$ 10,331	$ (1,382)

Savings Plans, Pension Plans_10

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Schedule of Estimated Future Benefit Payments) (Details) $ in Thousands	Dec. 31, 2019USD ($)
Pension Plans [Member]
2020	$ 30,769
2021	30,756
2022	30,689
2023	30,589
2024	30,232
2025–2029	143,237
OPEB [Member]
2020	4,548
2021	3,780
2022	3,595
2023	3,402
2024	3,148
2025–2029	$ 12,966

Savings Plans, Pension Plans_11

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Weighted Average Assumptions Used to Determine the Benefit Obligation for Non-Deltic and Deltic Plans) (Details)	Dec. 31, 2019	Dec. 31, 2018
Pension Plans [Member] | Non-Deltic Plans [Member]
Discount rate	3.40%	4.40%
Rate of salaried compensation increase	3.00%	3.00%
Pension Plans [Member] | Deltic Plans [Member]
Discount rate	3.40%	4.40%
Rate of salaried compensation increase	4.00%	4.00%
OPEB [Member] | Non-Deltic Plans [Member]
Discount rate	3.40%	4.40%
OPEB [Member] | Deltic Plans [Member]
Discount rate	3.40%	4.40%

Savings Plans, Pension Plans_12

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Weighted Average Assumptions Used to Determine the Net Periodic Cost (Benefit) for Non-Deltic and Deltic Plans) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Expected return on plan assets	5.75%
Pension Plans [Member] | Non-Deltic Plans [Member]
Discount rate	4.40%	3.85%	4.40%
Expected return on plan assets	6.25%	6.25%	6.50%
Rate of salaried compensation increase	3.00%	3.00%	3.00%
Pension Plans [Member] | Deltic Plans [Member]
Discount rate	4.40%	4.30%
Expected return on plan assets	6.25%	6.25%
Rate of salaried compensation increase	4.00%	4.00%
OPEB [Member] | Non-Deltic Plans [Member]
Discount rate	4.40%	3.65%	4.10%
OPEB [Member] | Deltic Plans [Member]
Discount rate	4.40%	4.30%

Savings Plans, Pension Plans_13

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (One Percent Point Change in Health Care Cost Trend Rate Effect) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Savings Plans Pension Plans And Other Postretirement Employee Benefits [Abstract]
Effect on total service and interest cost components, 1% increase	$ 165
Effect on total service and interest cost components, 1% decrease	(126)
Effect on accumulated postretirement benefit obligation, 1% increase	3,282
Effect on accumulated postretirement benefit obligation, 1% decrease	$ (2,582)

Components of Accumulated Oth_3

Components of Accumulated Other Comprehensive Loss (Changes in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period		$ (1,314,779)	$ (200,542)
Net loss (gain) arising during the period		23,660	18,776
Amounts reclassified from AOCL to earnings		(5,732)	(7,461)
Amounts reclassified from AOCL to accumulated deficit	[1]		23,265
Balance at end of period		(1,226,831)	(1,314,779)
Gains and losses on cash flow hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period		1,560	(705)
Net loss (gain) arising during the period		19,824	3,062
Amounts reclassified from AOCL to earnings		(1,384)	(647)
Amounts reclassified from AOCL to accumulated deficit	[1]		(150)
Balance at end of period		20,000	1,560
Prior Service Cost [Member] | Pension Plans [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period		404	446
Amounts reclassified from AOCL to earnings		(156)	(137)
Amounts reclassified from AOCL to accumulated deficit	[1]		95
Balance at end of period		248	404
Prior Service Cost [Member] | OPEB [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period		(8,651)	(12,546)
Amounts reclassified from AOCL to earnings		6,545	6,569
Amounts reclassified from AOCL to accumulated deficit	[1]		(2,674)
Balance at end of period		(2,106)	(8,651)
Actuarial Loss [Member] | Pension Plans [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period		128,849	100,165
Net loss (gain) arising during the period		(2,081)	17,268
Amounts reclassified from AOCL to earnings		(9,988)	(12,276)
Amounts reclassified from AOCL to accumulated deficit	[1]		23,692
Balance at end of period		116,780	128,849
Actuarial Loss [Member] | OPEB [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period		7,269	7,491
Net loss (gain) arising during the period		5,917	(1,554)
Amounts reclassified from AOCL to earnings		(749)	(970)
Amounts reclassified from AOCL to accumulated deficit	[1]		2,302
Balance at end of period		12,437	7,269
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period		129,431	94,851
Balance at end of period		$ 147,359	$ 129,431
[1]	Reclassifications between AOCL and accumulated deficit during 2018 relate to certain tax effects of tax law changes on pension and other postretirement employee benefits and a cash flow hedge upon adoption of ASU 2018-02 during 2018.

Commitments and Contingencies (

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Apr. 30, 2018	Sep. 30, 2015	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Loss contingency, damages sought, value		$ 9.8
Litigation settlement date			April 2018
Litigation final settlement amount	$ 6

Financial Results by Quarter _3

Financial Results by Quarter (Unaudited) Financial Results by Quarter (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Quarterly Financial Data [Abstract]
Revenues	$ 203,499		$ 226,302		$ 215,581		$ 181,716		$ 217,250		$ 289,199		$ 268,233		$ 199,897		$ 827,098		$ 974,579		$ 678,595
Operating income	20,024		31,196		24,956		20,107		9,964		77,742		69,417		27,831		96,283		184,954		151,907
Net income	$ 11,399		$ 20,565		$ 17,137		$ 6,560		$ 1,799		$ 60,336		$ 46,148		$ 14,597		$ 55,661		$ 122,880		$ 86,453
Net income per share:
Basic	$ 0.17	[1]	$ 0.30	[1]	$ 0.25	[1]	$ 0.10	[1]	$ 0.03	[1]	$ 0.96	[1]	$ 0.73	[1]	$ 0.29	[1]	$ 0.82	[1]	$ 2.03	[1]	$ 2.12
Diluted	$ 0.17	[1]	$ 0.30	[1]	$ 0.25	[1]	$ 0.10	[1]	$ 0.03	[1]	$ 0.93	[1]	$ 0.73	[1]	$ 0.29	[1]	$ 0.82	[1]	$ 1.99	[1]	$ 2.10
[1]	Per share amounts are computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the total computed for the year.