Boise Cascade (BCC) 10-Q 5 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	6 Months Ended
	Jun. 30, 2019	Jul. 26, 2019
Document and Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
Document Transition Report	false
Entity File Number	001-35805
Entity Registrant Name	Boise Cascade Company
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-1496201
Entity Address, Address Line One	1111 West Jefferson Street Suite 300
Entity Address, City or Town	Boise
Entity Address, State or Province	ID
Entity Address, Postal Zip Code	83702-5389
City Area Code	208
Local Phone Number	384-6161
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	BCC
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		38,974,845
Entity Central Index Key	0001328581
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Sales
Sales	$ 1,230,081	$ 1,408,132	$ 2,272,167	$ 2,590,973
Costs and expenses
Materials, labor, and other operating expenses (excluding depreciation)	1,049,655	1,193,918	1,947,477	2,203,696
Depreciation and amortization	19,454	24,296	38,671	46,407
Selling and distribution expenses	98,866	96,841	185,892	180,197
General and administrative expenses	16,786	19,977	33,461	35,863
Other (income) expense, net	188	(956)	(120)	(1,050)
Total costs and expenses	1,184,949	1,334,076	2,205,381	2,465,113
Income from operations	45,132	74,056	66,786	125,860
Foreign currency exchange gain (loss)	248	(172)	410	(435)
Pension expense (excluding service costs)	(290)	(12,380)	(589)	(12,624)
Interest expense	(6,486)	(6,580)	(12,923)	(12,942)
Interest income	416	237	908	501
Change in fair value of interest rate swaps	(1,551)	499	(2,534)	2,140
Total nonoperating income (expense)	(7,663)	(18,396)	(14,728)	(23,360)
Income before income taxes	37,469	55,660	52,058	102,500
Income tax provision	(9,751)	(13,835)	(12,951)	(23,625)
Net income	$ 27,718	$ 41,825	$ 39,107	$ 78,875
Weighted average common shares outstanding:
Basic (in shares)	39,087	38,981	38,986	38,880
Diluted (in shares)	39,199	39,403	39,185	39,384
Net income per common share:
Basic (in dollars per share)	$ 0.71	$ 1.07	$ 1	$ 2.03
Diluted (in dollars per share)	0.71	1.06	1	2
Dividends declared per common share	$ 0.09	$ 0.07	$ 0.18	$ 0.14

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 27,718	$ 41,825	$ 39,107	$ 78,875
Defined benefit pension plans
Actuarial gain, net of tax of $-, $3,383, $- and $3,383, respectively	0	9,957	0	9,957
Amortization of actuarial (gain) loss, net of tax of ($11), $90, ($22) and $298, respectively	(33)	266	(65)	879
Effect of settlements, net of tax of $-, $3,044, $-, and $3,044, respectively	0	8,959	0	8,959
Other comprehensive income (loss), net of tax	(33)	19,182	(65)	19,795
Comprehensive income	$ 27,685	$ 61,007	$ 39,042	$ 98,670

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Unaudited) Parenthetical - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Actuarial gain, tax effect	$ 0	$ 3,383	$ 0	$ 3,383
Amortization of actuarial (gain) loss, tax	(11)	90	(22)	298
Effect of settlements, tax effect	$ 0	$ 3,044	$ 0	$ 3,044

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current
Cash and cash equivalents	$ 202,407	$ 191,671
Receivables
Trade, less allowances of $744 and $1,062	316,698	214,338
Related parties	490	436
Other	11,476	14,466
Inventories	524,451	533,049
Prepaid expenses and other	17,745	31,818
Total current assets	1,073,267	985,778
Property and equipment, net	464,095	487,224
Operating lease right-of-use assets	65,989	0
Finance lease right-of-use assets	20,301	0
Timber deposits	14,918	12,568
Goodwill	60,342	59,159
Intangible assets, net	18,409	16,851
Deferred income taxes	8,167	8,211
Other assets	7,323	11,457
Total assets	1,732,811	1,581,248
Accounts payable
Trade	273,570	210,587
Related parties	1,633	1,070
Accrued liabilities
Compensation and benefits	64,912	87,911
Interest payable	6,735	6,748
Other	77,256	63,509
Total current liabilities	424,106	369,825
Debt
Long-term debt	439,986	439,428
Other
Compensation and benefits	43,548	41,283
Operating lease liabilities, net of current portion	60,289	0
Finance lease liabilities, net of current portion	21,701	0
Deferred income taxes	24,439	19,218
Other long-term liabilities	13,721	38,904
Total other liabilities	163,698	99,405
Commitments and contingent liabilities
Stockholders' equity
Preferred stock, $0.01 par value per share; 50,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $0.01 par value per share; 300,000 shares authorized, 44,342 and 44,076 shares issued, respectively	443	441
Treasury stock, 5,367 shares at cost	(138,909)	(138,909)
Additional paid-in capital	529,147	528,654
Accumulated other comprehensive loss	(47,717)	(47,652)
Retained earnings	362,057	330,056
Total stockholders' equity	705,021	672,590
Total liabilities and stockholders' equity	$ 1,732,811	$ 1,581,248

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Current Period Unaudited) Parenthetical - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Trade receivables, allowances	$ 744	$ 1,062
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	44,342,000	44,076,000
Treasury stock, at cost	5,367,000	5,367,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash provided by (used for) operations
Net income	$ 39,107	$ 78,875
Items in net income not using (providing) cash
Depreciation and amortization, including deferred financing costs and other	39,821	47,416
Stock-based compensation	4,069	4,731
Pension expense	911	13,026
Deferred income taxes	5,629	(1,092)
Change in fair value of interest rate swaps	2,534	(2,140)
Other	(33)	(1,051)
Decrease (increase) in working capital, net of acquisitions
Receivables	(93,977)	(111,068)
Inventories	13,324	(89,051)
Prepaid expenses and other	(4,773)	(4,361)
Accounts payable and accrued liabilities	45,355	134,498
Pension contributions	(927)	(1,042)
Income taxes payable	16,735	18,586
Other	(923)	1,009
Net cash provided by operations	66,852	88,336
Cash provided by (used for) investment
Expenditures for property and equipment	(32,824)	(28,327)
Acquisitions of businesses and facilities	(15,675)	(17,577)
Proceeds from sale of facilities	2,493	0
Proceeds from sales of assets and other	1,395	321
Net cash used for investment	(44,611)	(45,583)
Cash provided by (used for) financing
Borrowings of long-term debt, including revolving credit facility	5,500	7,500
Payments of long-term debt, including revolving credit facility	(5,500)	(7,500)
Tax withholding payments on stock-based awards	(3,574)	(5,120)
Dividends paid on common stock	(7,562)	(5,481)
Other	(369)	719
Net cash used for financing	(11,505)	(9,882)
Net increase in cash and cash equivalents	10,736	32,871
Balance at beginning of the period	191,671	177,140
Balance at end of the period	$ 202,407	$ 210,011

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (Unaudited) Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Beginning balance, common stock, shares issued at Dec. 31, 2017		43,748
Beginning balance, net of taxes at Dec. 31, 2017	$ 674,549	$ 437	$ (133,979)	$ 523,550	$ (76,702)	$ 361,243
Beginning balance, treasury stock, shares at Dec. 31, 2017			5,167
Net income	37,050					37,050
Other comprehensive loss	613				613
Common stock issued, shares		292
Common stock issued, value	3	$ 3
Stock-based compensation	2,286			2,286
Common stock dividends	(2,793)					(2,793)
Tax withholding payments on stock-based awards	(5,117)			(5,117)
Proceeds from exercise of stock options	464			464
Other	(3)			(3)
Ending balance, common stock, shares issued at Mar. 31, 2018		44,040
Ending balance, treasury stock, shares at Mar. 31, 2018			5,167
Ending balance, net of taxes at Mar. 31, 2018	707,052	$ 440	$ (133,979)	521,180	(76,089)	395,500
Beginning balance, common stock, shares issued at Dec. 31, 2017		43,748
Beginning balance, net of taxes at Dec. 31, 2017	674,549	$ 437	$ (133,979)	523,550	(76,702)	361,243
Beginning balance, treasury stock, shares at Dec. 31, 2017			5,167
Net income	78,875
Other comprehensive loss	19,795
Ending balance, common stock, shares issued at Jun. 30, 2018		44,058
Ending balance, treasury stock, shares at Jun. 30, 2018			5,167
Ending balance, net of taxes at Jun. 30, 2018	768,188	$ 441	$ (133,979)	524,099	(56,907)	434,534
Beginning balance, common stock, shares issued at Mar. 31, 2018		44,040
Beginning balance, net of taxes at Mar. 31, 2018	707,052	$ 440	$ (133,979)	521,180	(76,089)	395,500
Beginning balance, treasury stock, shares at Mar. 31, 2018			5,167
Net income	41,825					41,825
Other comprehensive loss	19,182				19,182
Common stock issued, shares		18
Common stock issued, value	1	$ 1
Stock-based compensation	2,445			2,445
Common stock dividends	(2,791)					(2,791)
Tax withholding payments on stock-based awards	(3)			(3)
Proceeds from exercise of stock options	478			478
Other	(1)			(1)
Ending balance, common stock, shares issued at Jun. 30, 2018		44,058
Ending balance, treasury stock, shares at Jun. 30, 2018			5,167
Ending balance, net of taxes at Jun. 30, 2018	$ 768,188	$ 441	$ (133,979)	524,099	(56,907)	434,534
Beginning balance, common stock, shares issued at Dec. 31, 2018	44,076	44,076
Beginning balance, net of taxes at Dec. 31, 2018	$ 672,590	$ 441	$ (138,909)	528,654	(47,652)	330,056
Beginning balance, treasury stock, shares at Dec. 31, 2018	5,367		5,367
Net income	$ 11,389					11,389
Other comprehensive loss	(32)				(32)
Common stock issued, shares		265
Common stock issued, value	2	$ 2
Stock-based compensation	2,200			2,200
Common stock dividends	(3,561)					(3,561)
Tax withholding payments on stock-based awards	(3,569)			(3,569)
Other	(2)			(2)
Ending balance, common stock, shares issued at Mar. 31, 2019		44,341
Ending balance, treasury stock, shares at Mar. 31, 2019			5,367
Ending balance, net of taxes at Mar. 31, 2019	$ 679,017	$ 443	$ (138,909)	527,283	(47,684)	337,884
Beginning balance, common stock, shares issued at Dec. 31, 2018	44,076	44,076
Beginning balance, net of taxes at Dec. 31, 2018	$ 672,590	$ 441	$ (138,909)	528,654	(47,652)	330,056
Beginning balance, treasury stock, shares at Dec. 31, 2018	5,367		5,367
Net income	$ 39,107
Other comprehensive loss	$ (65)
Ending balance, common stock, shares issued at Jun. 30, 2019	44,342	44,342
Ending balance, treasury stock, shares at Jun. 30, 2019	5,367		5,367
Ending balance, net of taxes at Jun. 30, 2019	$ 705,021	$ 443	$ (138,909)	529,147	(47,717)	362,057
Beginning balance, common stock, shares issued at Mar. 31, 2019		44,341
Beginning balance, net of taxes at Mar. 31, 2019	679,017	$ 443	$ (138,909)	527,283	(47,684)	337,884
Beginning balance, treasury stock, shares at Mar. 31, 2019			5,367
Net income	27,718					27,718
Other comprehensive loss	(33)				(33)
Common stock issued, shares		1
Common stock issued, value	0	$ 0
Stock-based compensation	1,869			1,869
Common stock dividends	(3,545)					(3,545)
Tax withholding payments on stock-based awards	$ (5)			(5)
Ending balance, common stock, shares issued at Jun. 30, 2019	44,342	44,342
Ending balance, treasury stock, shares at Jun. 30, 2019	5,367		5,367
Ending balance, net of taxes at Jun. 30, 2019	$ 705,021	$ 443	$ (138,909)	$ 529,147	$ (47,717)	$ 362,057

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Unaudited) Parenthetical - $ / shares	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share	$ 0.09	$ 0.09	$ 0.07	$ 0.07	$ 0.18	$ 0.14

Nature of Operations and Consol

Nature of Operations and Consolidation	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Consolidation	Nature of Operations and Consolidation Nature of Operations Boise Cascade Company is a building products company headquartered in Boise, Idaho. As used in this Form 10-Q, the terms "Boise Cascade," "we," and "our" refer to Boise Cascade Company and its consolidated subsidiaries. We are one of the largest producers of engineered wood products (EWP) and plywood in North America and a leading United States (U.S.) wholesale distributor of building products. We operate our business using two reportable segments: (1) Wood Products, which primarily manufactures EWP and plywood, and (2) Building Materials Distribution, which is a wholesale distributor of building materials. For more information, see Note 13, Segment Information. Consolidation The accompanying quarterly consolidated financial statements have not been audited by an independent registered public accounting firm but, in the opinion of management, include all adjustments necessary to present fairly the financial position, results of operations, cash flows, and stockholders' equity for the interim periods presented. Except as disclosed within these condensed notes to unaudited quarterly consolidated financial statements, the adjustments made were of a normal, recurring nature. Certain information and footnote disclosures normally included in our annual consolidated financial statements have been condensed or omitted. The quarterly consolidated financial statements include the accounts of Boise Cascade and its subsidiaries after elimination of intercompany balances and transactions. Quarterly results are not necessarily indicative of results that may be expected for the full year. These condensed notes to unaudited quarterly consolidated financial statements should be read in conjunction with our 2018 Form 10-K and the other reports we file with the Securities and Exchange Commission (SEC).

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Accounting Policies The complete summary of significant accounting policies is included in Note 2, Summary of Significant Accounting Policies, of the Notes to Consolidated Financial Statements in "Item 8. Financial Statements and Supplementary Data" in our 2018 Form 10-K. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities, and reported amounts of revenues and expenses. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangible assets, and other long-lived assets; legal contingencies; guarantee obligations; indemnifications; assumptions used in retirement, medical, and workers' compensation benefits; assumptions used in the determination of right-of-use assets and related lease liabilities; stock-based compensation; fair value measurements; income taxes; and vendor and customer rebates, among others. These estimates and assumptions are based on management's best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. We adjust such estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in these estimates resulting from continuing changes in the economic environment will be reflected in the consolidated financial statements in future periods. Revenue Recognition Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. For revenue disaggregated by major product line for each reportable segment, see Note 13, Segment Information. Fees for shipping and handling charged to customers for sales transactions are included in "Sales" in our Consolidated Statements of Operations. When control over products has transferred to the customer, we have elected to recognize costs related to shipping and handling as an expense. For our Wood Products segment, costs related to shipping and handling are included in "Materials, labor, and other operating expenses (excluding depreciation)" in our Consolidated Statements of Operations. In our Wood Products segment, we view our shipping and handling costs as a cost of the manufacturing process and the movement of product to our end customers. For our Building Materials Distribution segment, costs related to shipping and handling of $43.4 million and $40.8 million , for the three months ended June 30, 2019 and 2018 , respectively, and $80.3 million and $74.3 million for the six months ended June 30, 2019 and 2018 , respectively, are included in "Selling and distribution expenses" in our Consolidated Statements of Operations. In our Building Materials Distribution segment, our activities relate to the purchase and resale of finished product, and excluding shipping and handling costs from “Materials, labor, and other operating expenses (excluding depreciation)” provides us a clearer view of our operating performance and the effectiveness of our sales and purchasing functions. Customer Rebates and Allowances Rebates are provided to our customers and our customers' customers based on the volume of their purchases, among other factors such as customer loyalty, conversion, and commitment. We provide the rebates to increase the sell-through of our products. Rebates are generally estimated based on the expected amount to be paid and recorded as a decrease in "Sales." At June 30, 2019 , and December 31, 2018 , we had $51.9 million and $52.1 million , respectively, of rebates payable to our customers recorded in "Accrued liabilities, Other" on our Consolidated Balance Sheets. Vendor Rebates and Allowances We receive rebates and allowances from our vendors under a number of different programs, including vendor marketing programs. At June 30, 2019 , and December 31, 2018 , we had $6.1 million and $9.7 million , respectively, of vendor rebates and allowances recorded in "Receivables, Other" on our Consolidated Balance Sheets. Rebates and allowances received from our vendors are recognized as a reduction of "Materials, labor, and other operating expenses (excluding depreciation)" when the product is sold, unless the rebates and allowances are linked to a specific incremental cost to sell a vendor's product. Amounts received from vendors that are linked to specific selling and distribution expenses are recognized as a reduction of "Selling and distribution expenses" in the period the expense is incurred. Inventories Inventories included the following (work in process is not material): June 30, December 31, (thousands) Finished goods and work in process $ 445,321 $ 441,774 Logs 40,837 54,301 Other raw materials and supplies 38,293 36,974 $ 524,451 $ 533,049 Property and Equipment Property and equipment consisted of the following asset classes: June 30, December 31, (thousands) Land $ 39,304 $ 38,888 Buildings (a) 137,050 164,878 Improvements 58,477 49,509 Mobile equipment, information technology, and office furniture 155,117 150,712 Machinery and equipment 643,818 629,337 Construction in progress 37,195 31,015 1,070,961 1,064,339 Less accumulated depreciation (606,866 ) (577,115 ) $ 464,095 $ 487,224 ___________________________________ (a) As of December 31, 2018 , capital lease assets were included in the "Buildings" asset class. For additional information related to leases, see Note 8, Leases. Fair Value Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value hierarchy under GAAP gives the highest priority to quoted market prices (Level 1) and the lowest priority to unobservable inputs (Level 3). In general, and where applicable, we use quoted prices in active markets for identical assets or liabilities to determine fair value (Level 1). If quoted prices in active markets for identical assets or liabilities are not available to determine fair value, we use quoted prices for similar assets and liabilities or inputs that are observable either directly or indirectly (Level 2). If quoted prices for identical or similar assets are not available or are unobservable, we may use internally developed valuation models, whose inputs include bid prices, and third-party valuations utilizing underlying asset assumptions (Level 3). Financial Instruments Our financial instruments are cash and cash equivalents, accounts receivable, accounts payable, long-term debt, and interest rate swaps. Our cash is recorded at cost, which approximates fair value, and our cash equivalents are money market funds. As of June 30, 2019 , and December 31, 2018 , we held $167.3 million and $160.4 million , respectively, in money market funds that are measured at fair value on a recurring basis using Level 1 inputs. The recorded values of accounts receivable and accounts payable approximate fair values based on their short-term nature. At June 30, 2019 , and December 31, 2018 , the book value of our fixed-rate debt for each period was $350.0 million , and the fair value was estimated to be $355.7 million and $328.1 million , respectively. The difference between the book value and the fair value is derived from the difference between the period-end market interest rate and the stated rate of our fixed-rate, long-term debt. We estimated the fair value of our fixed-rate debt using quoted market prices of our debt in inactive markets (Level 2 inputs). The interest rate on our term loans is based on market conditions such as the London Interbank Offered Rate (LIBOR) or a base rate. Because the interest rate on the term loans is based on current market conditions, we believe that the estimated fair value of the outstanding balance on our term loans approximates book value. As discussed below, we also have interest rate swaps to mitigate our variable interest rate exposure, the fair value of which is measured based on Level 2 inputs. Interest Rate Risk and Interest Rate Swaps We are exposed to interest rate risk arising from fluctuations in variable-rate LIBOR on our term loans and when we have loan amounts outstanding on our Revolving Credit Facility. At June 30, 2019 , we had $95.0 million of variable-rate debt outstanding. Our objective is to limit the variability of interest payments on our debt. To meet this objective, in 2016 we entered into receive-variable, pay-fixed interest rate swaps to change the variable-rate cash flow exposure to fixed-rate cash flows. In accordance with our risk management strategy, we actively monitor our interest rate exposure and use derivative instruments from time to time to manage the related risk. On February 16, 2016, and March 31, 2016, we entered into interest rate swap agreements with notional principal amounts of $50.0 million and $75.0 million , respectively, to offset risks associated with the variability in cash flows relating to interest payments that are based on one-month LIBOR. We do not speculate using derivative instruments. At June 30, 2019 , and December 31, 2018 , the notional principal amount of our interest rate swap agreements was $95.0 million after liquidating $30.0 million of the interest rate swap with original notional principal amount of $75.0 million in November 2018. Under the interest rate swaps, we receive LIBOR-based variable interest rate payments and make fixed interest rate payments, thereby fixing the interest rate on $95.0 million of variable rate debt exposure. Payments on the interest rate swaps with notional principal amounts of $50.0 million and $45.0 million are due on a monthly basis at an annual fixed rate of 1.007% and 1.256% , respectively, and expire in February 2022 and March 2022, respectively. The interest rate swap agreements were not designated as cash flow hedges, and as a result, all changes in the fair value are recognized in "Change in fair value of interest rate swaps" in our Consolidated Statements of Operations rather than through other comprehensive income. At June 30, 2019 , and December 31, 2018 , we recorded long-term assets of $1.2 million and $3.8 million , respectively, in "Other assets" on our Consolidated Balance Sheets, representing the fair value of the interest rate swap agreements. The swaps were valued based on observable inputs for similar assets and liabilities and other observable inputs for interest rates and yield curves (Level 2 inputs). Concentration of Credit Risk We are exposed to credit risk related to customer accounts receivable. In order to manage credit risk, we consider customer concentrations and current economic trends and monitor the creditworthiness of significant customers based on ongoing credit evaluations. At June 30, 2019 , receivables from two customers each accounted for approximately 14% of total receivables. At December 31, 2018 , receivables from two customers accounted for approximately 13% and 11% , respectively, of total receivables. No other customer accounted for 10% or more of total receivables. New and Recently Adopted Accounting Standards In August 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 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 . This ASU provides guidance on implementation costs incurred in a cloud computing arrangement (CCA) that is a service contract. The guidance aligns the accounting for such costs with the guidance on capitalizing costs associated with developing or obtaining internal-use software. Specifically, the ASU amends ASC 350 to include in its scope implementation costs of a CCA that is a service contract and clarifies that a customer should apply ASC 350-40 to determine which implementation costs should be capitalized in such a CCA. The updated guidance is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. The amendments should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. We currently do not expect the adoption of the guidance to have a material effect on our financial statements, but will continue to monitor the standard through the effective date. 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 . This ASU amends ASC 715 to remove disclosures that are no longer considered cost beneficial, clarifies the specific requirements of disclosures, and adds disclosure requirements identified as relevant related to defined benefit pension and other postretirement plans. The ASU's changes related to disclosures are part of the FASB's disclosure framework project. The updated guidance is effective retrospectively for annual reporting periods ending after December 15, 2020, with early adoption permitted. We are currently evaluating the effects of this ASU on our disclosures in the notes to our financial statements. 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 . This ASU amends ASC 820 to remove disclosures that are no longer considered cost beneficial, clarifies the specific requirements of disclosures, and adds disclosure requirements identified as relevant related to recurring and nonrecurring fair value measurements. The ASU's changes related to disclosures are part of the FASB's disclosure framework project. The updated guidance is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. We currently do not expect the adoption of the guidance to have a material effect on our disclosures, but will continue to monitor the standard through the effective date. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) . This ASU sets forth a "current expected credit loss" (CECL) model which requires the measurement of all expected credit losses for financial instruments or other assets (e.g. trade receivables), held at the reporting date based on historical experience, current conditions, and reasonable supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost and applies to some off-balance sheet credit exposures. ASU 2016-13 also requires enhanced disclosures to help financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an entity's portfolio. This ASU is effective for annual reporting periods ending after December 15, 2019, using a modified retrospective approach. We are currently evaluating the effects of this ASU on our financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . This amendment requires a lessee to recognize a right-of-use (ROU) asset and an associated lease liability on the balance sheet for all leases (whether operating or finance leases) with a term longer than 12 months. For leases defined as finance leases under the new standard, the lessee subsequently recognizes interest expense and amortization of the ROU asset, similar to accounting for capital leases under the previous lease standard. For leases defined as operating leases under the new standard, the lessee subsequently recognizes straight-line lease expense over the life of the lease. We adopted this standard effective January 1, 2019. The new lease standard had a material impact on our consolidated balance sheets, but did not have a material impact on our consolidated statements of operations or cash flows. The most significant impact was the recognition of ROU assets and lease liabilities for operating leases. See Note 8, Leases, for additional information on the impact of this standard on our accounting for leases and additional required qualitative disclosures of our lease policies. There were no other accounting standards recently issued that had or are expected to have a material impact on our consolidated financial statements and associated disclosures. Reclassifications Certain amounts in prior year's consolidated financial statements have been reclassified to conform with current year's presentation, none of which were considered material.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three and six months ended June 30, 2019 , we recorded $9.8 million and $13.0 million , respectively of income tax expense and had an effective rate of 26.0% and 24.9% , respectively. During the three and six months ended June 30, 2019 , the primary reason for the difference between the federal statutory income tax rate of 21% and the effective tax rate was the effect of state taxes. For the three and six months ended June 30, 2018 , we recorded $13.8 million and $23.6 million , respectively, of income tax expense and had an effective rate of 24.9% and 23.0% , respectively. For the three months ended June 30, 2018 , the primary reason for the difference between the federal statutory income tax rate of 21% and the effective tax rate was the effect of state taxes. For the six months ended June 30, 2018 , the primary reason for the difference between the federal statutory income tax rate of 21% and the effective tax rate was the effect of state taxes, offset partially by excess tax benefits of vested share-based payment awards. During the six months ended June 30, 2019 , refunds received, net of cash taxes paid were $10.6 million . During the six months ended June 30, 2018 , cash paid for taxes, net of refunds received, were $6.5 million .

Net Income Per Common Share

Net Income Per Common Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Net Income Per Common Share	Net Income Per Common Share Basic net income per common share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Weighted average common shares outstanding for the basic net income per common share calculation includes certain vested restricted stock units (RSUs) and performance stock units (PSUs) as there are no conditions under which those shares will not be issued. Diluted net income per common share is computed by dividing net income by the combination of the weighted average number of common shares outstanding during the period and other potentially dilutive weighted average common shares. Other potentially dilutive weighted average common shares include the dilutive effect of stock options, RSUs, and PSUs for each period using the treasury stock method. Under the treasury stock method, the exercise price of a share and the amount of compensation expense, if any, for future service that has not yet been recognized are assumed to be used to repurchase shares in the current period. The following table sets forth the computation of basic and diluted net income per common share: Three Months Ended Six Months Ended 2019 2018 2019 2018 (thousands, except per-share data) Net income $ 27,718 $ 41,825 $ 39,107 $ 78,875 Weighted average common shares outstanding during the period (for basic calculation) 39,087 38,981 38,986 38,880 Dilutive effect of other potential common shares 112 422 199 504 Weighted average common shares and potential common shares (for diluted calculation) 39,199 39,403 39,185 39,384 Net income per common share - Basic $ 0.71 $ 1.07 $ 1.00 $ 2.03 Net income per common share - Diluted $ 0.71 $ 1.06 $ 1.00 $ 2.00 The computation of the dilutive effect of other potential common shares excludes stock awards representing 0.2 million and no shares of common stock, respectively, in the three months ended June 30, 2019 and 2018 , and 0.2 million and 0.1 million of common stock shares, respectively, in the six months ended June 30, 2019 and 2018

Acquisition (Notes)

Acquisition (Notes)	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Acquisition	Acquisition During second quarter 2019, our wholly owned subsidiary, Boise Cascade Building Materials Distribution, L.L.C., completed the acquisition of a wholesale building material distribution location in Birmingham, Alabama (the "Acquisition"). The purchase price of the Acquisition was $15.7 million , subject to post-closing adjustments based upon working capital targets. We funded the Acquisition with cash on hand. The distribution location adds to our existing distribution business and strengthens our nationwide presence. In addition, we believe we will be able to broaden our product and service offerings within this market following the Acquisition. Goodwill represents the excess of the purchase price and related costs over the fair value of the net tangible and intangible assets of businesses acquired. The goodwill and customer relationships recognized from the Acquisition are deductible for U.S. income tax purposes. The useful life for customer relationships is 10 years . All of the goodwill and intangible assets were assigned to the Building Materials Distribution segment. The purchase price allocations of the Acquisition are preliminary and subject to post-closing working capital adjustments. The following table summarizes the allocations of the purchase price to the assets acquired and liabilities assumed, based on our estimates of the fair value at the acquisition date: Acquisition Date Fair Value (thousands) Accounts receivable $ 5,600 Inventories 3,398 Other assets 12 Property and equipment 3,487 Lease right-of-use assets 359 Intangible assets: Customer relationships 2,100 Goodwill 1,183 Assets acquired 16,139 Accounts payable 105 Lease liabilities 359 Liabilities assumed 464 Net assets acquired $ 15,675

Sale of Manufacturing Facility

Sale of Manufacturing Facility	6 Months Ended
	Jun. 30, 2019
Discontinued Operations and Disposal Groups [Abstract]
Sale of Manufacturing Facility	Sale of Manufacturing Facility In December 2018, we committed to sell a hardwood plywood facility located in Moncure, North Carolina, and subsequently entered into a definitive sale agreement in January 2019 (the Sale). This facility generated net sales and operating loss of approximately $5.5 million and $1.4 million , respectively, during the six months ended June 30, 2019 , and net sales and operating loss of approximately $17.1 million and $2.2 million , respectively, during the six months ended June 30, 2018 . These results are included in the operating results of our Wood Products segment. On March 1, 2019, we closed on the Sale and received proceeds of $2.5 million . The disposal group met the criteria to be classified as held for sale during fourth quarter 2018. Upon classification as held for sale, we discontinued depreciation of the long-lived assets, and performed an assessment of impairment to identify and expense any excess of carrying value over fair value less costs to sell. As a result, we recorded pre-tax impairment and sale-related losses of $24.0 million during fourth quarter 2018.

Debt

Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Debt	Debt Long-term debt consisted of the following: June 30, December 31, (thousands) Asset-based revolving credit facility $ — $ — Asset-based credit facility term loan due 2022 50,000 50,000 Term loan due 2026 45,000 45,000 5.625% senior notes due 2024 350,000 350,000 Deferred financing costs (5,014 ) (5,572 ) Long-term debt $ 439,986 $ 439,428 Asset-Based Credit Facility On May 15, 2015, Boise Cascade and its principal operating subsidiaries, Boise Cascade Wood Products, L.L.C., and Boise Cascade Building Materials Distribution, L.L.C., as borrowers, and Boise Cascade Wood Products Holdings Corp., as guarantor, entered into an Amended and Restated Credit Agreement, as amended, (Amended Agreement) with Wells Fargo Capital Finance, LLC, as administrative agent, and the banks named therein as lenders. The Amended Agreement includes a $370 million senior secured asset-based revolving credit facility (Revolving Credit Facility) and a $50.0 million term loan (ABL Term Loan) maturing on May 1, 2022. Interest on borrowings under our Revolving Credit Facility and ABL Term Loan are payable monthly. Borrowings under the Amended Agreement are constrained by a borrowing base formula dependent upon levels of eligible receivables and inventory reduced by outstanding borrowings and letters of credit (Availability). The Amended Agreement is secured by a first-priority security interest in substantially all of our assets, except for property and equipment. The proceeds of borrowings under the agreement are available for working capital and other general corporate purposes. The Amended Agreement contains customary nonfinancial covenants, including a negative pledge covenant and restrictions on new indebtedness, investments, distributions to equity holders, asset sales, and affiliate transactions, the scope of which are dependent on the Availability existing from time to time. The Amended Agreement also contains a requirement that we meet a 1 :1 fixed-charge coverage ratio (FCCR), applicable only if Availability falls below 10% of the aggregate revolving lending commitments, or $37 million . Availability exceeded the minimum threshold amounts required for testing of the FCCR at all times since entering into the Amended Agreement, and Availability at June 30, 2019 , was $365.4 million . The Amended Agreement permits us to pay dividends only if at the time of payment (i) no default has occurred or is continuing (or would result from such payment) under the Amended Agreement, and (ii) pro forma Excess Availability (as defined in the Amended Agreement) is equal to or exceeds 25% of the aggregate Revolver Commitments (as defined in the Amended Agreement) or (iii) (x) pro forma Excess Availability is equal to or exceeds 15% of the aggregate Revolver Commitment and (y) our fixed-charge coverage ratio is greater than or equal to 1 :1 on a pro forma basis. Revolving Credit Facility Interest rates under the Revolving Credit Facility are based, at our election, on either LIBOR or a base rate, as defined in the Amended Agreement, plus a spread over the index elected that ranges from 1.25% to 1.75% for loans based on LIBOR and from 0.25% to 0.75% for loans based on the base rate. The spread is determined on the basis of a pricing grid that results in a higher spread as average quarterly Availability declines. Letters of credit are subject to a fronting fee payable to the issuing bank and a fee payable to the lenders equal to the LIBOR margin rate. In addition, we are required to pay an unused commitment fee at a rate of 0.25% per annum of the average unused portion of the lending commitments. At both June 30, 2019 , and December 31, 2018 , we had no borrowings outstanding under the Revolving Credit Facility and $4.6 million of letters of credit outstanding. These letters of credit and borrowings, if any, reduce Availability under the Revolving Credit Facility by an equivalent amount. ABL Term Loan The ABL Term Loan was provided by institutions within the Farm Credit system. Borrowings under the ABL Term Loan may be repaid from time to time at the discretion of the borrowers without premium or penalty. However, any principal amount of ABL Term Loan repaid may not be subsequently re-borrowed. Interest rates under the ABL Term Loan are based, at our election, on either LIBOR or a base rate, as defined in the Amended Agreement, plus a spread over the index elected that ranges from 1.75% to 2.25% for LIBOR rate loans and from 0.75% to 1.25% for base rate loans, both dependent on the amount of Average Excess Availability (as defined in the Amended Agreement). During the six months ended June 30, 2019 , the average interest rate on the ABL Term Loan was approximately 4.22% . We have received and expect to continue receiving patronage credits under the ABL Term Loan. Patronage credits are distributions of profits from banks in the Farm Credit system, which are cooperatives that are required to distribute profits to their members. Patronage distributions, which are generally made in cash, are received in the year after they are earned. Patronage credits are recorded as a reduction to interest expense in the year earned. After giving effect to expected patronage distributions, the effective average net interest rate on the ABL Term Loan was approximately 3.2% during the six months ended June 30, 2019 . Term Loan On March 30, 2016 (Closing Date), Boise Cascade and its principal operating subsidiaries, Boise Cascade Wood Products, L.L.C., and Boise Cascade Building Materials Distribution, L.L.C., as borrowers, and the guarantors party thereto, entered into a term loan agreement, as amended, (Term Loan Agreement) with American AgCredit, PCA, as administrative agent and sole lead arranger, and other banks in the Farm Credit system named therein as lenders. The Term Loan Agreement was for a $75.0 million secured term loan (Term Loan). The outstanding principal balance of the Term Loan amortizes and is payable in equal installments of $10 million per year on each of the sixth, seventh, eighth, and ninth anniversaries of the Closing Date, with the remaining principal balance due and payable on March 30, 2026. Interest on our Term Loan is payable monthly. In December 2016, we prepaid $30 million of the Term Loan, which became available to reborrow. In November 2018, we terminated the ability to reborrow this prepaid Term Loan. Amounts prepaid and eligible for reborrowing were subject to an unused line fee of 0.325% per annum times the average daily amount of the unused commitments. This prepayment of $30 million satisfied our principal obligations due on the sixth, seventh, and eighth anniversaries of the Closing Date. Pursuant to the Term Loan Agreement, the borrowers are required to maintain, as of the end of any fiscal quarter, a Capitalization Ratio lower than 60% , a Consolidated Net Worth greater than $350 million , and Available Liquidity greater than $100 million (each as defined in the Term Loan Agreement). In addition, under the Term Loan Agreement, and subject to certain exceptions, the borrowers may not, among other things, (i) incur indebtedness, (ii) incur liens, (iii) make junior payments, (iv) make certain investments, and (v) under certain circumstances, make capital expenditures in excess of $50 million during four consecutive quarters. The Term Loan Agreement also includes customary representations of the borrowers and provides for certain events of default customary for similar facilities. The Term Loan Agreement permits us to pay dividends only if at the time of payment (i) no default has occurred or is continuing (or would result from such payment) under the Term Loan Agreement, and (ii) our interest coverage ratio is greater than or equal to 3 :1 at such time or (iii) our fixed-charge coverage ratio is greater than or equal to 1 :1. Interest rates under the Term Loan Agreement are based, at our election, on either the LIBOR or a base rate, as defined in the Term Loan Agreement, plus a spread over the index. The applicable spread for the Term Loan ranges from 1.875% to 2.125% for LIBOR rate loans, and 0.875% to 1.125% for base rate loans, both dependent on our Interest Coverage Ratio (as defined in the Term Loan Agreement). During the six months ended June 30, 2019 , the average interest rate on the Term Loan was approximately 4.36% . We have received and expect to continue receiving patronage credits under the Term Loan. After giving effect to expected patronage distributions, the effective average net interest rate on the Term Loan was approximately 3.4% . The Term Loan is secured by a first priority mortgage on our Thorsby, Alabama, and Roxboro, North Carolina, EWP facilities and a first priority security interest on the equipment and certain tangible personal property located therein. 2024 Notes On August 29, 2016, Boise Cascade issued $350 million of 5.625% senior notes due September 1, 2024 (2024 Notes), through a private placement that was exempt from the registration requirements of the Securities Act. Interest on our 2024 Notes is payable semiannually in arrears on March 1 and September 1. The 2024 Notes are guaranteed by each of our existing and future direct or indirect domestic subsidiaries that is a guarantor under our Amended Agreement. The 2024 Notes are senior unsecured obligations and rank equally with all of the existing and future senior indebtedness of Boise Cascade Company and of the guarantors, senior to all of their existing and future subordinated indebtedness, effectively subordinated to all of their present and future senior secured indebtedness (including all borrowings with respect to our Amended Agreement to the extent of the value of the assets securing such indebtedness), and structurally subordinated to the indebtedness of any subsidiaries that do not guarantee the 2024 Notes. The terms of the indenture governing the 2024 Notes, among other things, limit the ability of Boise Cascade and our restricted subsidiaries to: incur additional debt; declare or pay dividends; redeem stock or make other distributions to stockholders; make investments; create liens on assets; consolidate, merge or transfer substantially all of their assets; enter into transactions with affiliates; and sell or transfer certain assets. The indenture governing the 2024 Notes, permits us to pay dividends only if at the time of payment (i) no default has occurred or is continuing (or would result from such payment) under the indenture, and (ii) our consolidated leverage ratio is no greater than 3.5 :1, or (iii) the dividend, together with other dividends since the issue date, would not exceed our "builder" basket under the indenture. In addition, the indenture includes certain specific baskets for the payment of dividends. The indenture governing the 2024 Notes provides for customary events of default and remedies. Interest Rate Swaps For information on interest rate swaps, see Interest Rate Risk and Interest Rate Swaps of Note 2, Summary of Significant Accounting Policies. Cash Paid for Interest For the six months ended June 30, 2019 and 2018 , cash payments for interest were $11.5 million and $11.6 million , respectively.

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Lessee, Operating Leases	Leases Adoption of ASC Topic 842, "Leases" On January 1, 2019, we adopted Topic 842 using the modified retrospective transition method and used the effective date as our date of initial application. Consequently, leases for reporting periods beginning after January 1, 2019 are presented under Topic 842, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under Topic 840. The new standard provides a number of optional practical expedients in transition. We elected the ‘package of practical expedients’, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification, and initial direct costs. We did not elect the use-of-hindsight practical expedient. We recorded additional lease liabilities for operating leases of $72.4 million, with an offsetting increase to ROU assets of approximately $69.2 million as of January 1, 2019, substantially all of which are real estate leases. The difference between these amounts is related to the reclassification of accrued straight-line rent upon adoption. Capital leases were also reclassified from "Property and equipment, net" to "Finance lease right-of-use assets" and from "Other long-term liabilities" to "Finance lease liabilities" on our Consolidated Balance Sheet. The standard did not have a material impact on our consolidated net earnings and cash flows. There was no cumulative effect adjustment recorded to opening retained earnings as of January 1, 2019, upon adoption of Topic 842. The effect of the changes made to our consolidated balance sheet as of January 1, 2019, for the adoption of the new lease standard was as follows: Balance at December 31, 2018 Adjustments Due to ASC 842 Balance at January 1, 2019 (thousands) ASSETS Property and equipment, net $ 487,224 $ (21,732 ) $ 465,492 Operating lease right-of-use assets — 69,155 69,155 Finance lease right-of-use assets — 20,872 20,872 Prepaid expenses and other 31,818 (246 ) 31,572 LIABILITIES Accrued liabilities, other 63,509 8,863 72,372 Operating lease liabilities, net of current portion — 63,498 63,498 Finance lease liabilities, net of current portion — 21,921 21,921 Other long-term liabilities 38,904 (26,233 ) 12,671 In accordance with the new lease standard requirements, the disclosure of the impact of adoption on our consolidated balance sheet was as follows: June 30, 2019 As Reported Balances Without Adoption of ASC 842 Effect of Change Higher/(Lower) (thousands) ASSETS Property and equipment, net $ 464,095 $ 485,232 $ (21,137 ) Operating lease right-of-use assets 65,989 — 65,989 Finance lease right-of-use assets 20,301 — 20,301 Prepaid expenses and other 17,745 17,991 (246 ) LIABILITIES Accrued liabilities, other 77,256 68,304 8,952 Operating lease liabilities, net of current portion 60,289 — 60,289 Finance lease liabilities, net of current portion 21,701 — 21,701 Other long-term liabilities 13,721 39,756 (26,035 ) Leases We primarily lease land, building, and equipment under operating and finance leases. We determine if an arrangement is a lease at inception and assess lease classification as either operating or finance at lease inception or upon modification. Substantially all of our leases with initial terms greater than one year are for real estate, including distribution centers, corporate headquarters, land, and other office space. Substantially all of these lease agreements have fixed payment terms based on the passage of time and are recorded in our Building Materials Distribution segment. Many of our leases include fixed escalation clauses, renewal options and/or termination options that are factored into our determination of lease term and lease payments when appropriate. Renewal options generally range from one to ten years with fixed payment terms similar to those in the original lease agreements. Some lease agreements provide us with the option to purchase the leased property at market value. Our lease agreements do not contain any residual value guarantees. 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. ROU assets and lease liabilities are recognized at the lease commencement date based on the estimated present value of fixed lease payments over the lease term. The current portion of our operating and finance lease liabilities are recorded in "Accrued liabilities, Other" on our Consolidated Balance Sheets. We use our estimated incremental borrowing rate, which is derived from information available at the lease commencement date, in determining the present value of lease payments. In determining our incremental borrowing rates, we give consideration to publicly available interest rates for instruments with similar characteristics. For purposes of determining straight-line rent expense, the lease term is calculated from the date we first take possession of the facility, including any periods of free rent and any renewal option periods we are reasonably certain of exercising. Variable lease expense generally includes reimbursement of actual costs for common area maintenance, property taxes, and insurance on leased real estate and are recorded as incurred. Most of our operating lease expense was recorded in "Selling and distribution expenses" in our Consolidated Statements of Operations. The new standard provides practical expedients for an entity’s ongoing accounting. We elected the practical expedient to not separate lease and non-lease components for all of our leases. We also elected the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, we will not recognize ROU assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases in transition. Our short-term leases primarily include equipment rentals with lease terms on a month-to-month basis, which provide for our seasonal needs and flexibility in the use of equipment. Our short-term leases also include certain real estate for which either party has the right to cancel upon providing notice of 30 to 90 days. Lease Costs The components of lease expense were as follows: Three Months Ended Six Months Ended (thousands) Operating lease cost $ 3,367 $ 6,708 Finance lease cost Amortization of right-of-use assets 385 760 Interest on lease liabilities 465 926 Variable lease cost 722 1,341 Short-term lease cost 1,075 2,069 Sublease income (172 ) (304 ) Total lease cost $ 5,842 $ 11,500 Other Information Supplemental cash flow information related to leases was as follows: Six Months Ended (thousands) Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 6,637 Operating cash flows from finance leases 926 Financing cash flows from finance leases 369 Right-of-use assets obtained in exchange for lease obligations Operating leases 1,368 Finance leases 310 Other information related to leases was as follows: June 30, 2019 Weighted-average remaining lease term (years) Operating leases 9 Finance leases 15 Weighted-average discount rate Operating leases (a) 6.5 % Finance leases 8.8 % ___________________________________ (a) Upon adoption of the new lease standard, discount rates used for existing leases were established at January 1, 2019. As of June 30, 2019 , our minimum lease payment requirements for noncancelable operating and finance leases are as follows (in thousands): Operating Leases Finance Leases (thousands) Remainder of 2019 $ 6,608 $ 1,344 2020 12,878 2,713 2021 11,741 2,753 2022 10,374 2,747 2023 10,045 2,769 Thereafter 41,338 30,177 Total future minimum lease payments 92,984 42,503 Less: interest (23,743 ) (19,951 ) Total lease obligations 69,241 22,552 Less: current obligations (8,952 ) (851 ) Long-term lease obligations $ 60,289 $ 21,701 Disclosures Related to Periods Prior to Adoption of ASC Topic 842, "Leases" Rental expense for operating leases was $4.6 million and $9.2 million for the three and six months ended June 30, 2018 , respectively. Sublease rental income was not material in any of the periods presented. During the six months ended June 30, 2018 , we recorded a capital lease for a distribution center with an initial lease term of 20 years in the amount of $14.3 million , which represents a non-cash investing and financing activity. At December 31, 2018, capital lease obligations are recorded in "Other long-term liabilities" on our Consolidated Balance Sheets. As of December 31, 2018, our minimum lease payment requirements for noncancelable operating and capital leases with terms of more than one year are as follows: Operating Leases Capital Leases (thousands) 2019 $ 13,222 $ 2,578 2020 12,734 2,617 2021 11,595 2,656 2022 10,208 2,694 2023 9,800 2,740 Thereafter 40,381 30,177 Total $ 97,940 43,462 Less: interest on capital lease obligations (20,838 ) Total principal payable on capital lease obligations 22,624 Less: current obligations (703 ) Long-term capital lease obligations $ 21,921 These future minimum lease payment requirements have not been reduced by sublease income due in the future under noncancelable subleases. Minimum sublease income expected to be received in the future is not material.
Leases, Finance Leases	Leases Adoption of ASC Topic 842, "Leases" On January 1, 2019, we adopted Topic 842 using the modified retrospective transition method and used the effective date as our date of initial application. Consequently, leases for reporting periods beginning after January 1, 2019 are presented under Topic 842, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under Topic 840. The new standard provides a number of optional practical expedients in transition. We elected the ‘package of practical expedients’, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification, and initial direct costs. We did not elect the use-of-hindsight practical expedient. We recorded additional lease liabilities for operating leases of $72.4 million, with an offsetting increase to ROU assets of approximately $69.2 million as of January 1, 2019, substantially all of which are real estate leases. The difference between these amounts is related to the reclassification of accrued straight-line rent upon adoption. Capital leases were also reclassified from "Property and equipment, net" to "Finance lease right-of-use assets" and from "Other long-term liabilities" to "Finance lease liabilities" on our Consolidated Balance Sheet. The standard did not have a material impact on our consolidated net earnings and cash flows. There was no cumulative effect adjustment recorded to opening retained earnings as of January 1, 2019, upon adoption of Topic 842. The effect of the changes made to our consolidated balance sheet as of January 1, 2019, for the adoption of the new lease standard was as follows: Balance at December 31, 2018 Adjustments Due to ASC 842 Balance at January 1, 2019 (thousands) ASSETS Property and equipment, net $ 487,224 $ (21,732 ) $ 465,492 Operating lease right-of-use assets — 69,155 69,155 Finance lease right-of-use assets — 20,872 20,872 Prepaid expenses and other 31,818 (246 ) 31,572 LIABILITIES Accrued liabilities, other 63,509 8,863 72,372 Operating lease liabilities, net of current portion — 63,498 63,498 Finance lease liabilities, net of current portion — 21,921 21,921 Other long-term liabilities 38,904 (26,233 ) 12,671 In accordance with the new lease standard requirements, the disclosure of the impact of adoption on our consolidated balance sheet was as follows: June 30, 2019 As Reported Balances Without Adoption of ASC 842 Effect of Change Higher/(Lower) (thousands) ASSETS Property and equipment, net $ 464,095 $ 485,232 $ (21,137 ) Operating lease right-of-use assets 65,989 — 65,989 Finance lease right-of-use assets 20,301 — 20,301 Prepaid expenses and other 17,745 17,991 (246 ) LIABILITIES Accrued liabilities, other 77,256 68,304 8,952 Operating lease liabilities, net of current portion 60,289 — 60,289 Finance lease liabilities, net of current portion 21,701 — 21,701 Other long-term liabilities 13,721 39,756 (26,035 ) Leases We primarily lease land, building, and equipment under operating and finance leases. We determine if an arrangement is a lease at inception and assess lease classification as either operating or finance at lease inception or upon modification. Substantially all of our leases with initial terms greater than one year are for real estate, including distribution centers, corporate headquarters, land, and other office space. Substantially all of these lease agreements have fixed payment terms based on the passage of time and are recorded in our Building Materials Distribution segment. Many of our leases include fixed escalation clauses, renewal options and/or termination options that are factored into our determination of lease term and lease payments when appropriate. Renewal options generally range from one to ten years with fixed payment terms similar to those in the original lease agreements. Some lease agreements provide us with the option to purchase the leased property at market value. Our lease agreements do not contain any residual value guarantees. 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. ROU assets and lease liabilities are recognized at the lease commencement date based on the estimated present value of fixed lease payments over the lease term. The current portion of our operating and finance lease liabilities are recorded in "Accrued liabilities, Other" on our Consolidated Balance Sheets. We use our estimated incremental borrowing rate, which is derived from information available at the lease commencement date, in determining the present value of lease payments. In determining our incremental borrowing rates, we give consideration to publicly available interest rates for instruments with similar characteristics. For purposes of determining straight-line rent expense, the lease term is calculated from the date we first take possession of the facility, including any periods of free rent and any renewal option periods we are reasonably certain of exercising. Variable lease expense generally includes reimbursement of actual costs for common area maintenance, property taxes, and insurance on leased real estate and are recorded as incurred. Most of our operating lease expense was recorded in "Selling and distribution expenses" in our Consolidated Statements of Operations. The new standard provides practical expedients for an entity’s ongoing accounting. We elected the practical expedient to not separate lease and non-lease components for all of our leases. We also elected the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, we will not recognize ROU assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases in transition. Our short-term leases primarily include equipment rentals with lease terms on a month-to-month basis, which provide for our seasonal needs and flexibility in the use of equipment. Our short-term leases also include certain real estate for which either party has the right to cancel upon providing notice of 30 to 90 days. Lease Costs The components of lease expense were as follows: Three Months Ended Six Months Ended (thousands) Operating lease cost $ 3,367 $ 6,708 Finance lease cost Amortization of right-of-use assets 385 760 Interest on lease liabilities 465 926 Variable lease cost 722 1,341 Short-term lease cost 1,075 2,069 Sublease income (172 ) (304 ) Total lease cost $ 5,842 $ 11,500 Other Information Supplemental cash flow information related to leases was as follows: Six Months Ended (thousands) Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 6,637 Operating cash flows from finance leases 926 Financing cash flows from finance leases 369 Right-of-use assets obtained in exchange for lease obligations Operating leases 1,368 Finance leases 310 Other information related to leases was as follows: June 30, 2019 Weighted-average remaining lease term (years) Operating leases 9 Finance leases 15 Weighted-average discount rate Operating leases (a) 6.5 % Finance leases 8.8 % ___________________________________ (a) Upon adoption of the new lease standard, discount rates used for existing leases were established at January 1, 2019. As of June 30, 2019 , our minimum lease payment requirements for noncancelable operating and finance leases are as follows (in thousands): Operating Leases Finance Leases (thousands) Remainder of 2019 $ 6,608 $ 1,344 2020 12,878 2,713 2021 11,741 2,753 2022 10,374 2,747 2023 10,045 2,769 Thereafter 41,338 30,177 Total future minimum lease payments 92,984 42,503 Less: interest (23,743 ) (19,951 ) Total lease obligations 69,241 22,552 Less: current obligations (8,952 ) (851 ) Long-term lease obligations $ 60,289 $ 21,701 Disclosures Related to Periods Prior to Adoption of ASC Topic 842, "Leases" Rental expense for operating leases was $4.6 million and $9.2 million for the three and six months ended June 30, 2018 , respectively. Sublease rental income was not material in any of the periods presented. During the six months ended June 30, 2018 , we recorded a capital lease for a distribution center with an initial lease term of 20 years in the amount of $14.3 million , which represents a non-cash investing and financing activity. At December 31, 2018, capital lease obligations are recorded in "Other long-term liabilities" on our Consolidated Balance Sheets. As of December 31, 2018, our minimum lease payment requirements for noncancelable operating and capital leases with terms of more than one year are as follows: Operating Leases Capital Leases (thousands) 2019 $ 13,222 $ 2,578 2020 12,734 2,617 2021 11,595 2,656 2022 10,208 2,694 2023 9,800 2,740 Thereafter 40,381 30,177 Total $ 97,940 43,462 Less: interest on capital lease obligations (20,838 ) Total principal payable on capital lease obligations 22,624 Less: current obligations (703 ) Long-term capital lease obligations $ 21,921 These future minimum lease payment requirements have not been reduced by sublease income due in the future under noncancelable subleases. Minimum sublease income expected to be received in the future is not material.

Retirement and Benefit Plans

Retirement and Benefit Plans	6 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Retirement and Benefit Plans	Retirement and Benefit Plans The following table presents the pension benefit costs: Three Months Ended Six Months Ended 2019 2018 2019 2018 (thousands) Service cost $ 161 $ 198 $ 322 $ 403 Interest cost 1,809 3,312 3,625 7,323 Expected return on plan assets (1,475 ) (3,292 ) (2,949 ) (7,880 ) Amortization of actuarial (gain) loss (44 ) 356 (87 ) 1,177 Plan settlement loss — 12,003 — 12,003 Net periodic benefit expense $ 451 $ 12,577 $ 911 $ 13,026 Service cost is recorded in the same income statement line items as other employee compensation costs arising from services rendered, and the other components of net periodic benefit expense are recorded in "Pension expense (excluding service costs)" in our Consolidated Statements of Operations. During the six months ended June 30, 2019 , we contributed $0.9 million in cash to the pension plans. For the remainder of 2019 , we expect to make approximately $0.9 million in cash contributions to the pension plans. On April 25, 2018, Boise Cascade transferred $151.8 million of its pension plan assets to The Prudential Insurance Company of America (Prudential) for the purchase of a group annuity contract. Under the arrangement, Prudential assumed ongoing responsibility for administration and benefit payments for approximately one-third of Boise Cascade’s U.S. qualified pension plan projected benefit obligations outstanding at the time of the transaction. As a result of the transaction, the Company recognized a non-cash pension settlement charge of $12.0 million during the three months ended June 30, 2018.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation In February 2019 and 2018, we granted two types of stock-based awards under our incentive plan: performance stock units (PSUs) and restricted stock units (RSUs). PSU and RSU Awards During the six months ended June 30, 2019 , we granted 110,923 PSUs to our officers and other employees, subject to performance and service conditions. For the officers, the number of shares actually awarded will range from 0% and 200% of the target amount, depending upon Boise Cascade's 2019 return on invested capital (ROIC), as approved by our Compensation Committee in accordance with the related grant agreement. For the other employees, the number of shares actually awarded will range from 0% to 200% of the target amount, depending upon Boise Cascade’s 2019 EBITDA, defined as income before interest (interest expense and interest income), income taxes, and depreciation and amortization, determined in accordance with the related grant agreement. Because the ROIC and EBITDA components contain a performance condition, we record compensation expense over the requisite service period based on the most probable number of shares expected to vest. The PSUs granted to officers in 2019 , if earned, generally vest in a single installment three years from the date of grant, while the PSUs granted to other employees vest in three equal tranches each year after the grant date. During the six months ended June 30, 2018 , we granted 78,976 PSUs to our officers and other employees, subject to performance and service conditions. During the 2018 performance period, officers and other employees earned 100% and 110% , respectively, of the target based on Boise Cascade’s 2018 ROIC and EBITDA, determined by our Compensation Committee in accordance with the related grant agreement. During the six months ended June 30, 2019 and 2018 , we granted an aggregate of 166,180 and 99,087 RSUs, respectively, to our officers, other employees, and nonemployee directors with only service conditions. The RSUs granted to officers and other employees vest in three equal tranches each year after the grant date. The RSUs granted to nonemployee directors vest over a 1 year period. We based the fair value of PSU and RSU awards on the closing market price of our common stock on the grant date. During the six months ended June 30, 2019 and 2018 , the total fair value of PSUs and RSUs vested was $11.4 million and $15.2 million , respectively. The following summarizes the activity of our PSUs and RSUs awarded under our incentive plan for the six months ended June 30, 2019 : PSUs RSUs Number of shares Weighted Average Grant-Date Fair Value Number of shares Weighted Average Grant-Date Fair Value Outstanding, December 31, 2018 429,788 $ 25.90 289,173 $ 29.52 Granted 110,923 29.48 166,180 29.06 Performance condition adjustment, net (a) 1,443 43.05 — — Vested (223,706 ) 19.97 (183,311 ) 26.43 Forfeited (19,545 ) 35.97 (13,136 ) 35.34 Outstanding, June 30, 2019 298,903 $ 31.09 258,906 $ 31.11 _______________________________ (a) Represents additional PSUs granted to non-officers based on achievement of 2018 EBITDA in excess of target. Compensation Expense We record compensation expense over the awards' vesting period and account for share-based award forfeitures as they occur, rather than making estimates of future forfeitures. Any shares not vested are forfeited. We recognize stock awards with only service conditions on a straight-line basis over the requisite service period. Most of our share-based compensation expense was recorded in "General and administrative expenses" in our Consolidated Statements of Operations. Total stock-based compensation recognized from PSUs and RSUs, net of forfeitures, was as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 (thousands) PSUs $ 736 $ 1,231 $ 1,715 $ 2,318 RSUs 1,133 1,214 2,354 2,413 Total $ 1,869 $ 2,445 $ 4,069 $ 4,731 The related tax benefit for the six months ended June 30, 2019 and 2018 , was $1.0 million and $1.2 million , respectively. As of June 30, 2019 , total unrecognized compensation expense related to nonvested share-based compensation arrangements was $10.9 million . This expense is expected to be recognized over a weighted-average period of 1.9 years.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2019
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders' Equity Dividends On November 14, 2017, we announced that our board of directors approved a dividend policy to pay quarterly cash dividends to holders of our common stock. During each of the first and second quarters of 2019 , we declared and paid a dividend of $0.09 per share of our common stock. During each of the first and second quarters of 2018 , we declared and paid a dividend of $0.07 per share of our common stock. As such, we paid $7.6 million and $5.5 million of dividends to shareholders during the six months ended June 30, 2019 and 2018 , respectively. On August 1, 2019 , our board of directors declared a dividend of $0.09 per share of common stock, payable on September 16, 2019 , to stockholders of record on September 3, 2019 . For a description of the restrictions in our asset-based credit facility, Term Loan, and the indenture governing our senior notes on our ability to pay dividends, see Note 7, Debt. Accumulated Other Comprehensive Loss The following table details the changes in accumulated other comprehensive loss for the three and six months ended June 30, 2019 and 2018 : Three Months Ended Six Months Ended 2019 2018 2019 2018 (thousands) Beginning balance, net of taxes $ (47,684 ) $ (76,089 ) $ (47,652 ) $ (76,702 ) Net actuarial gain, before taxes — 13,340 — 13,340 Amortization of actuarial (gain) loss, before taxes (a) (44 ) 356 (87 ) 1,177 Effect of settlements, before taxes (a) — 12,003 — 12,003 Income taxes 11 (6,517 ) 22 (6,725 ) Ending balance, net of taxes $ (47,717 ) $ (56,907 ) $ (47,717 ) $ (56,907 ) ___________________________________ (a) Represents amounts reclassified from accumulated other comprehensive loss. These amounts are included in the computation of net periodic pension cost. For additional information, see Note 9, Retirement and Benefit Plans.

Transactions With Related Party

Transactions With Related Party	6 Months Ended
	Jun. 30, 2019
Related Party Transactions [Abstract]
Transactions With Related Party	Transactions With Related Party Louisiana Timber Procurement Company, L.L.C. (LTP) is an unconsolidated variable-interest entity that is 50% owned by us and 50% owned by Packaging Corporation of America (PCA). LTP procures sawtimber, pulpwood, residual chips, and other residual wood fiber to meet the wood and fiber requirements of us and PCA in Louisiana. We are not the primary beneficiary of LTP as we do not have power to direct the activities that most significantly affect the economic performance of LTP. Accordingly, we do not consolidate LTP's results in our financial statements. Sales Related-party sales to LTP from our Wood Products segment in our Consolidated Statements of Operations were $4.3 million and $4.6 million , respectively, during the three months ended June 30, 2019 and 2018 , and $8.8 million and $8.9 million , respectively, during the six months ended June 30, 2019 and 2018 . These sales are recorded in "Sales" in our Consolidated Statements of Operations. Costs and Expenses Related-party wood fiber purchases from LTP were $21.4 million and $22.6 million , respectively, during the three months ended June 30, 2019 and 2018 , and $41.4 million and $43.0 million , respectively, during the six months ended June 30, 2019 and 2018

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Segment Information	Segment Information We operate our business using two reportable segments: Wood Products and Building Materials Distribution. Corporate and Other results are presented as reconciling items to arrive at total net sales and operating income. There are no differences in our basis of measurement of segment profit or loss from those disclosed in Note 17, Segment Information, of the Notes to Consolidated Financial Statements in "Item 8. Financial Statements and Supplementary Data" in our 2018 Form 10-K. Wood Products and Building Materials Distribution segment sales to external customers, including related parties, by product line are as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 (millions) Wood Products (a) LVL $ 12.0 $ 9.8 $ 23.9 $ 23.2 I-joists 8.0 7.9 13.3 17.8 Other engineered wood products 8.6 5.8 14.3 12.3 Plywood and veneer 63.5 96.7 130.9 183.7 Lumber 14.0 25.0 27.2 49.9 Byproducts 18.0 22.8 38.0 44.9 Particleboard — 11.8 — 22.6 Other 8.6 14.7 19.4 30.2 132.7 194.3 267.1 384.8 Building Materials Distribution Commodity 450.7 602.7 849.0 1,093.2 General line 429.6 392.9 753.1 708.1 Engineered wood products 217.2 218.2 403.0 404.8 1,097.4 1,213.8 2,005.1 2,206.1 $ 1,230.1 $ 1,408.1 $ 2,272.2 $ 2,591.0 ___________________________________ (a) Amounts represent sales to external customers. Sales are calculated after intersegment sales eliminations to our Building Materials Distribution segment, as well as the cost of EWP rebates and sales allowances provided at various stages of the supply chain (including distributors, retail lumberyards, and professional builders). For the six months ended June 30, 2019 , approximately 76% of Wood Products' EWP sales volumes were to our Building Materials Distribution segment. An analysis of our operations by segment is as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 (thousands) Net sales by segment Wood Products $ 334,256 $ 425,483 $ 653,779 $ 823,474 Building Materials Distribution 1,097,421 1,213,783 2,005,129 2,206,164 Intersegment eliminations and other (a) (201,596 ) (231,134 ) (386,741 ) (438,665 ) Total net sales $ 1,230,081 $ 1,408,132 $ 2,272,167 $ 2,590,973 Segment operating income Wood Products $ 18,908 $ 36,482 $ 30,538 $ 62,603 Building Materials Distribution 33,800 47,713 51,317 80,101 Total segment operating income 52,708 84,195 81,855 142,704 Unallocated corporate and other (7,576 ) (10,139 ) (15,069 ) (16,844 ) Income from operations $ 45,132 $ 74,056 $ 66,786 $ 125,860 ___________________________________ (a) Primarily represents intersegment sales from our Wood Products segment to our Building Materials Distribution segment.

Commitments, Legal Proceedings

Commitments, Legal Proceedings and Contingencies, and Guarantees	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments, Legal Proceedings and Contingencies, and Guarantees	Commitments, Legal Proceedings and Contingencies, and Guarantees Commitments We are a party to a number of long-term log supply agreements that are discussed in Note 18, Commitments, Legal Proceedings and Contingencies, and Guarantees, of the Notes to Consolidated Financial Statements in "Item 8. Financial Statements and Supplementary Data" in our 2018 Form 10-K. In addition, we have purchase obligations for goods and services, capital expenditures, and raw materials entered into in the normal course of business. As of June 30, 2019 , there have been no material changes to the above commitments disclosed in the 2018 Form 10-K. Legal Proceedings and Contingencies We are a party to legal proceedings that arise in the ordinary course of our business, including commercial liability claims, premises claims, environmental claims, and employment-related claims, among others. As of the date of this filing, we believe it is not reasonably possible that any of the legal actions against us will, individually or in the aggregate, have a material adverse effect on our financial position, results of operations, or cash flows. Guarantees We provide guarantees, indemnifications, and assurances to others. Note 18, Commitments, Legal Proceedings and Contingencies, and Guarantees, of the Notes to Consolidated Financial Statements in "Item 8. Financial Statements and Supplementary Data" in our 2018 Form 10-K describes the nature of our guarantees, including the approximate terms of the guarantees, how the guarantees arose, the events or circumstances that would require us to perform under the guarantees, and the maximum potential undiscounted amounts of future payments we could be required to make. As of June 30, 2019 , there have been no material changes to the guarantees disclosed in the 2018

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Use of Estimates [Policy Text Block]	Use of Estimates
Revenue Recognition [Policy Text Block]	Revenue Recognition Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. For revenue disaggregated by major product line for each reportable segment, see Note 13, Segment Information. Fees for shipping and handling charged to customers for sales transactions are included in "Sales" in our Consolidated Statements of Operations. When control over products has transferred to the customer, we have elected to recognize costs related to shipping and handling as an expense. For our Wood Products segment, costs related to shipping and handling are included in "Materials, labor, and other operating expenses (excluding depreciation)" in our Consolidated Statements of Operations. In our Wood Products segment, we view our shipping and handling costs as a cost of the manufacturing process and the movement of product to our end customers. For our Building Materials Distribution segment, costs related to shipping and handling of $43.4 million and $40.8 million , for the three months ended June 30, 2019 and 2018 , respectively, and $80.3 million and $74.3 million for the six months ended June 30, 2019 and 2018 , respectively, are included in "Selling and distribution expenses" in our Consolidated Statements of Operations. In our Building Materials Distribution segment, our activities relate to the purchase and resale of finished product, and excluding shipping and handling costs from “Materials, labor, and other operating expenses (excluding depreciation)” provides us a clearer view of our operating performance and the effectiveness of our sales and purchasing functions. Customer Rebates and Allowances Rebates are provided to our customers and our customers' customers based on the volume of their purchases, among other factors such as customer loyalty, conversion, and commitment. We provide the rebates to increase the sell-through of our products. Rebates are generally estimated based on the expected amount to be paid and recorded as a decrease in "Sales." At June 30, 2019 , and December 31, 2018 , we had $51.9 million and $52.1 million , respectively, of rebates payable to our customers recorded in "Accrued liabilities, Other" on our Consolidated Balance Sheets.
Vendor Rebates and Allowances [Policy Text Block]	Rebates and allowances received from our vendors are recognized as a reduction of "Materials, labor, and other operating expenses (excluding depreciation)" when the product is sold, unless the rebates and allowances are linked to a specific incremental cost to sell a vendor's product. Amounts received from vendors that are linked to specific selling and distribution expenses are recognized as a reduction of "Selling and distribution expenses" in the period the expense is incurred.
Fair Value [Policy Text Block]	Fair Value Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value hierarchy under GAAP gives the highest priority to quoted market prices (Level 1) and the lowest priority to unobservable inputs (Level 3). In general, and where applicable, we use quoted prices in active markets for identical assets or liabilities to determine fair value (Level 1). If quoted prices in active markets for identical assets or liabilities are not available to determine fair value, we use quoted prices for similar assets and liabilities or inputs that are observable either directly or indirectly (Level 2). If quoted prices for identical or similar assets are not available or are unobservable, we may use internally developed valuation models, whose inputs include bid prices, and third-party valuations utilizing underlying asset assumptions (Level 3).
Financial Instruments [Policy Text Block]	Financial Instruments Our financial instruments are cash and cash equivalents, accounts receivable, accounts payable, long-term debt, and interest rate swaps. Our cash is recorded at cost, which approximates fair value, and our cash equivalents are money market funds. As of June 30, 2019 , and December 31, 2018 , we held $167.3 million and $160.4 million , respectively, in money market funds that are measured at fair value on a recurring basis using Level 1 inputs. The recorded values of accounts receivable and accounts payable approximate fair values based on their short-term nature. At June 30, 2019 , and December 31, 2018 , the book value of our fixed-rate debt for each period was $350.0 million , and the fair value was estimated to be $355.7 million and $328.1 million , respectively. The difference between the book value and the fair value is derived from the difference between the period-end market interest rate and the stated rate of our fixed-rate, long-term debt. We estimated the fair value of our fixed-rate debt using quoted market prices of our debt in inactive markets (Level 2 inputs). The interest rate on our term loans is based on market conditions such as the London Interbank Offered Rate (LIBOR) or a base rate. Because the interest rate on the term loans is based on current market conditions, we believe that the estimated fair value of the outstanding balance on our term loans approximates book value. As discussed below, we also have interest rate swaps to mitigate our variable interest rate exposure, the fair value of which is measured based on Level 2 inputs.
Derivatives [Policy Text Block]	In accordance with our risk management strategy, we actively monitor our interest rate exposure and use derivative instruments from time to time to manage the related risk.
New and recently adopted accounting standards [Policy Text Block]	New and Recently Adopted Accounting Standards In August 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 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 . This ASU provides guidance on implementation costs incurred in a cloud computing arrangement (CCA) that is a service contract. The guidance aligns the accounting for such costs with the guidance on capitalizing costs associated with developing or obtaining internal-use software. Specifically, the ASU amends ASC 350 to include in its scope implementation costs of a CCA that is a service contract and clarifies that a customer should apply ASC 350-40 to determine which implementation costs should be capitalized in such a CCA. The updated guidance is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. The amendments should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. We currently do not expect the adoption of the guidance to have a material effect on our financial statements, but will continue to monitor the standard through the effective date. 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 . This ASU amends ASC 715 to remove disclosures that are no longer considered cost beneficial, clarifies the specific requirements of disclosures, and adds disclosure requirements identified as relevant related to defined benefit pension and other postretirement plans. The ASU's changes related to disclosures are part of the FASB's disclosure framework project. The updated guidance is effective retrospectively for annual reporting periods ending after December 15, 2020, with early adoption permitted. We are currently evaluating the effects of this ASU on our disclosures in the notes to our financial statements. 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 . This ASU amends ASC 820 to remove disclosures that are no longer considered cost beneficial, clarifies the specific requirements of disclosures, and adds disclosure requirements identified as relevant related to recurring and nonrecurring fair value measurements. The ASU's changes related to disclosures are part of the FASB's disclosure framework project. The updated guidance is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. We currently do not expect the adoption of the guidance to have a material effect on our disclosures, but will continue to monitor the standard through the effective date. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) . This ASU sets forth a "current expected credit loss" (CECL) model which requires the measurement of all expected credit losses for financial instruments or other assets (e.g. trade receivables), held at the reporting date based on historical experience, current conditions, and reasonable supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost and applies to some off-balance sheet credit exposures. ASU 2016-13 also requires enhanced disclosures to help financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an entity's portfolio. This ASU is effective for annual reporting periods ending after December 15, 2019, using a modified retrospective approach. We are currently evaluating the effects of this ASU on our financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . This amendment requires a lessee to recognize a right-of-use (ROU) asset and an associated lease liability on the balance sheet for all leases (whether operating or finance leases) with a term longer than 12 months. For leases defined as finance leases under the new standard, the lessee subsequently recognizes interest expense and amortization of the ROU asset, similar to accounting for capital leases under the previous lease standard. For leases defined as operating leases under the new standard, the lessee subsequently recognizes straight-line lease expense over the life of the lease. We adopted this standard effective January 1, 2019. The new lease standard had a material impact on our consolidated balance sheets, but did not have a material impact on our consolidated statements of operations or cash flows. The most significant impact was the recognition of ROU assets and lease liabilities for operating leases. See Note 8, Leases, for additional information on the impact of this standard on our accounting for leases and additional required qualitative disclosures of our lease policies. There were no other accounting standards recently issued that had or are expected to have a material impact on our consolidated financial statements and associated disclosures.
Leases [Policy Text Block]	Leases We primarily lease land, building, and equipment under operating and finance leases. We determine if an arrangement is a lease at inception and assess lease classification as either operating or finance at lease inception or upon modification. Substantially all of our leases with initial terms greater than one year are for real estate, including distribution centers, corporate headquarters, land, and other office space. Substantially all of these lease agreements have fixed payment terms based on the passage of time and are recorded in our Building Materials Distribution segment. Many of our leases include fixed escalation clauses, renewal options and/or termination options that are factored into our determination of lease term and lease payments when appropriate. Renewal options generally range from one to ten years with fixed payment terms similar to those in the original lease agreements. Some lease agreements provide us with the option to purchase the leased property at market value. Our lease agreements do not contain any residual value guarantees. 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. ROU assets and lease liabilities are recognized at the lease commencement date based on the estimated present value of fixed lease payments over the lease term. The current portion of our operating and finance lease liabilities are recorded in "Accrued liabilities, Other" on our Consolidated Balance Sheets. We use our estimated incremental borrowing rate, which is derived from information available at the lease commencement date, in determining the present value of lease payments. In determining our incremental borrowing rates, we give consideration to publicly available interest rates for instruments with similar characteristics. For purposes of determining straight-line rent expense, the lease term is calculated from the date we first take possession of the facility, including any periods of free rent and any renewal option periods we are reasonably certain of exercising. Variable lease expense generally includes reimbursement of actual costs for common area maintenance, property taxes, and insurance on leased real estate and are recorded as incurred. Most of our operating lease expense was recorded in "Selling and distribution expenses" in our Consolidated Statements of Operations. The new standard provides practical expedients for an entity’s ongoing accounting. We elected the practical expedient to not separate lease and non-lease components for all of our leases. We also elected the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, we will not recognize ROU assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases in transition. Our short-term leases primarily include equipment rentals with lease terms on a month-to-month basis, which provide for our seasonal needs and flexibility in the use of equipment. Our short-term leases also include certain real estate for which either party has the right to cancel upon providing notice of 30 to 90 days.
Compensation Related Costs [Policy Text Block]	We record compensation expense over the awards' vesting period and account for share-based award forfeitures as they occur, rather than making estimates of future forfeitures. Any shares not vested are forfeited. We recognize stock awards with only service conditions on a straight-line basis over the requisite service period.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Inventories [Table Text Block]	Inventories included the following (work in process is not material): June 30, December 31, (thousands) Finished goods and work in process $ 445,321 $ 441,774 Logs 40,837 54,301 Other raw materials and supplies 38,293 36,974 $ 524,451 $ 533,049
Property and Equipment [Table Text Block]	Property and equipment consisted of the following asset classes: June 30, December 31, (thousands) Land $ 39,304 $ 38,888 Buildings (a) 137,050 164,878 Improvements 58,477 49,509 Mobile equipment, information technology, and office furniture 155,117 150,712 Machinery and equipment 643,818 629,337 Construction in progress 37,195 31,015 1,070,961 1,064,339 Less accumulated depreciation (606,866 ) (577,115 ) $ 464,095 $ 487,224 ___________________________________ (a) As of December 31, 2018 , capital lease assets were included in the "Buildings" asset class. For additional information related to leases, see Note 8, Leases.

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Net Income Per Common Share [Table Text Block]	The following table sets forth the computation of basic and diluted net income per common share: Three Months Ended Six Months Ended 2019 2018 2019 2018 (thousands, except per-share data) Net income $ 27,718 $ 41,825 $ 39,107 $ 78,875 Weighted average common shares outstanding during the period (for basic calculation) 39,087 38,981 38,986 38,880 Dilutive effect of other potential common shares 112 422 199 504 Weighted average common shares and potential common shares (for diluted calculation) 39,199 39,403 39,185 39,384 Net income per common share - Basic $ 0.71 $ 1.07 $ 1.00 $ 2.03 Net income per common share - Diluted $ 0.71 $ 1.06 $ 1.00 $ 2.00

Acquisition (Tables)

Acquisition (Tables)	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Fair Value at the Date of Acquisition [Table Text Block]	The following table summarizes the allocations of the purchase price to the assets acquired and liabilities assumed, based on our estimates of the fair value at the acquisition date: Acquisition Date Fair Value (thousands) Accounts receivable $ 5,600 Inventories 3,398 Other assets 12 Property and equipment 3,487 Lease right-of-use assets 359 Intangible assets: Customer relationships 2,100 Goodwill 1,183 Assets acquired 16,139 Accounts payable 105 Lease liabilities 359 Liabilities assumed 464 Net assets acquired $ 15,675

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Debt [Table Text Block]	Long-term debt consisted of the following: June 30, December 31, (thousands) Asset-based revolving credit facility $ — $ — Asset-based credit facility term loan due 2022 50,000 50,000 Term loan due 2026 45,000 45,000 5.625% senior notes due 2024 350,000 350,000 Deferred financing costs (5,014 ) (5,572 ) Long-term debt $ 439,986 $ 439,428

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Adoption of Topic 842 [Table Text Block]	The effect of the changes made to our consolidated balance sheet as of January 1, 2019, for the adoption of the new lease standard was as follows: Balance at December 31, 2018 Adjustments Due to ASC 842 Balance at January 1, 2019 (thousands) ASSETS Property and equipment, net $ 487,224 $ (21,732 ) $ 465,492 Operating lease right-of-use assets — 69,155 69,155 Finance lease right-of-use assets — 20,872 20,872 Prepaid expenses and other 31,818 (246 ) 31,572 LIABILITIES Accrued liabilities, other 63,509 8,863 72,372 Operating lease liabilities, net of current portion — 63,498 63,498 Finance lease liabilities, net of current portion — 21,921 21,921 Other long-term liabilities 38,904 (26,233 ) 12,671 In accordance with the new lease standard requirements, the disclosure of the impact of adoption on our consolidated balance sheet was as follows: June 30, 2019 As Reported Balances Without Adoption of ASC 842 Effect of Change Higher/(Lower) (thousands) ASSETS Property and equipment, net $ 464,095 $ 485,232 $ (21,137 ) Operating lease right-of-use assets 65,989 — 65,989 Finance lease right-of-use assets 20,301 — 20,301 Prepaid expenses and other 17,745 17,991 (246 ) LIABILITIES Accrued liabilities, other 77,256 68,304 8,952 Operating lease liabilities, net of current portion 60,289 — 60,289 Finance lease liabilities, net of current portion 21,701 — 21,701 Other long-term liabilities 13,721 39,756 (26,035 )
Lease Costs [Table Text Block]	The components of lease expense were as follows: Three Months Ended Six Months Ended (thousands) Operating lease cost $ 3,367 $ 6,708 Finance lease cost Amortization of right-of-use assets 385 760 Interest on lease liabilities 465 926 Variable lease cost 722 1,341 Short-term lease cost 1,075 2,069 Sublease income (172 ) (304 ) Total lease cost $ 5,842 $ 11,500
Lease Supplemental Cash Flow [Table Text Block]	Supplemental cash flow information related to leases was as follows: Six Months Ended (thousands) Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 6,637 Operating cash flows from finance leases 926 Financing cash flows from finance leases 369 Right-of-use assets obtained in exchange for lease obligations Operating leases 1,368 Finance leases 310
Lease Weighted-average Term and Discount Rate [Table Text Block]	Other information related to leases was as follows: June 30, 2019 Weighted-average remaining lease term (years) Operating leases 9 Finance leases 15 Weighted-average discount rate Operating leases (a) 6.5 % Finance leases 8.8 % ___________________________________ (a) Upon adoption of the new lease standard, discount rates used for existing leases were established at January 1, 2019.
Minimum Lease Payment Requirements for Operating Lease Liability - Topic 842 [Table Text Block]	As of June 30, 2019 , our minimum lease payment requirements for noncancelable operating and finance leases are as follows (in thousands): Operating Leases Finance Leases (thousands) Remainder of 2019 $ 6,608 $ 1,344 2020 12,878 2,713 2021 11,741 2,753 2022 10,374 2,747 2023 10,045 2,769 Thereafter 41,338 30,177 Total future minimum lease payments 92,984 42,503 Less: interest (23,743 ) (19,951 ) Total lease obligations 69,241 22,552 Less: current obligations (8,952 ) (851 ) Long-term lease obligations $ 60,289 $ 21,701
Minimum Lease Payment Requirements for Finance Lease Liability - Topic 842 [Table Text Block]	As of June 30, 2019 , our minimum lease payment requirements for noncancelable operating and finance leases are as follows (in thousands): Operating Leases Finance Leases (thousands) Remainder of 2019 $ 6,608 $ 1,344 2020 12,878 2,713 2021 11,741 2,753 2022 10,374 2,747 2023 10,045 2,769 Thereafter 41,338 30,177 Total future minimum lease payments 92,984 42,503 Less: interest (23,743 ) (19,951 ) Total lease obligations 69,241 22,552 Less: current obligations (8,952 ) (851 ) Long-term lease obligations $ 60,289 $ 21,701
Minimum Lease Payment Requirements for Operating Lease Liability - Topic 840 [Table Text Block]	As of December 31, 2018, our minimum lease payment requirements for noncancelable operating and capital leases with terms of more than one year are as follows: Operating Leases Capital Leases (thousands) 2019 $ 13,222 $ 2,578 2020 12,734 2,617 2021 11,595 2,656 2022 10,208 2,694 2023 9,800 2,740 Thereafter 40,381 30,177 Total $ 97,940 43,462 Less: interest on capital lease obligations (20,838 ) Total principal payable on capital lease obligations 22,624 Less: current obligations (703 ) Long-term capital lease obligations $ 21,921
Minimum Lease Payment Requirements for Capital Lease Liability - Topic 840 [Table Text Block]	As of December 31, 2018, our minimum lease payment requirements for noncancelable operating and capital leases with terms of more than one year are as follows: Operating Leases Capital Leases (thousands) 2019 $ 13,222 $ 2,578 2020 12,734 2,617 2021 11,595 2,656 2022 10,208 2,694 2023 9,800 2,740 Thereafter 40,381 30,177 Total $ 97,940 43,462 Less: interest on capital lease obligations (20,838 ) Total principal payable on capital lease obligations 22,624 Less: current obligations (703 ) Long-term capital lease obligations $ 21,921

Retirement and Benefit Plans (T

Retirement and Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Retirement and Benefit Plans [Table Text Block]	The following table presents the pension benefit costs: Three Months Ended Six Months Ended 2019 2018 2019 2018 (thousands) Service cost $ 161 $ 198 $ 322 $ 403 Interest cost 1,809 3,312 3,625 7,323 Expected return on plan assets (1,475 ) (3,292 ) (2,949 ) (7,880 ) Amortization of actuarial (gain) loss (44 ) 356 (87 ) 1,177 Plan settlement loss — 12,003 — 12,003 Net periodic benefit expense $ 451 $ 12,577 $ 911 $ 13,026

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Nonvested Share Activity [Table Text Block]	The following summarizes the activity of our PSUs and RSUs awarded under our incentive plan for the six months ended June 30, 2019 : PSUs RSUs Number of shares Weighted Average Grant-Date Fair Value Number of shares Weighted Average Grant-Date Fair Value Outstanding, December 31, 2018 429,788 $ 25.90 289,173 $ 29.52 Granted 110,923 29.48 166,180 29.06 Performance condition adjustment, net (a) 1,443 43.05 — — Vested (223,706 ) 19.97 (183,311 ) 26.43 Forfeited (19,545 ) 35.97 (13,136 ) 35.34 Outstanding, June 30, 2019 298,903 $ 31.09 258,906 $ 31.11 _______________________________ (a) Represents additional PSUs granted to non-officers based on achievement of 2018 EBITDA in excess of target.
Stock-Based Compensation Expense Recognized [Table Text Block]	Total stock-based compensation recognized from PSUs and RSUs, net of forfeitures, was as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 (thousands) PSUs $ 736 $ 1,231 $ 1,715 $ 2,318 RSUs 1,133 1,214 2,354 2,413 Total $ 1,869 $ 2,445 $ 4,069 $ 4,731

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2019
Stockholders' Equity Note [Abstract]
Changes in Accumulated Other Comprehensive Loss [Table Text Block]	The following table details the changes in accumulated other comprehensive loss for the three and six months ended June 30, 2019 and 2018 : Three Months Ended Six Months Ended 2019 2018 2019 2018 (thousands) Beginning balance, net of taxes $ (47,684 ) $ (76,089 ) $ (47,652 ) $ (76,702 ) Net actuarial gain, before taxes — 13,340 — 13,340 Amortization of actuarial (gain) loss, before taxes (a) (44 ) 356 (87 ) 1,177 Effect of settlements, before taxes (a) — 12,003 — 12,003 Income taxes 11 (6,517 ) 22 (6,725 ) Ending balance, net of taxes $ (47,717 ) $ (56,907 ) $ (47,717 ) $ (56,907 ) ___________________________________ (a) Represents amounts reclassified from accumulated other comprehensive loss. These amounts are included in the computation of net periodic pension cost. For additional information, see Note 9, Retirement and Benefit Plans.

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Sales by Product Line [Table Text Block]	Wood Products and Building Materials Distribution segment sales to external customers, including related parties, by product line are as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 (millions) Wood Products (a) LVL $ 12.0 $ 9.8 $ 23.9 $ 23.2 I-joists 8.0 7.9 13.3 17.8 Other engineered wood products 8.6 5.8 14.3 12.3 Plywood and veneer 63.5 96.7 130.9 183.7 Lumber 14.0 25.0 27.2 49.9 Byproducts 18.0 22.8 38.0 44.9 Particleboard — 11.8 — 22.6 Other 8.6 14.7 19.4 30.2 132.7 194.3 267.1 384.8 Building Materials Distribution Commodity 450.7 602.7 849.0 1,093.2 General line 429.6 392.9 753.1 708.1 Engineered wood products 217.2 218.2 403.0 404.8 1,097.4 1,213.8 2,005.1 2,206.1 $ 1,230.1 $ 1,408.1 $ 2,272.2 $ 2,591.0 ___________________________________ (a) Amounts represent sales to external customers. Sales are calculated after intersegment sales eliminations to our Building Materials Distribution segment, as well as the cost of EWP rebates and sales allowances provided at various stages of the supply chain (including distributors, retail lumberyards, and professional builders). For the six months ended June 30, 2019 , approximately 76% of Wood Products' EWP sales volumes were to our Building Materials Distribution segment.
Segment information [Table Text Block]	An analysis of our operations by segment is as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 (thousands) Net sales by segment Wood Products $ 334,256 $ 425,483 $ 653,779 $ 823,474 Building Materials Distribution 1,097,421 1,213,783 2,005,129 2,206,164 Intersegment eliminations and other (a) (201,596 ) (231,134 ) (386,741 ) (438,665 ) Total net sales $ 1,230,081 $ 1,408,132 $ 2,272,167 $ 2,590,973 Segment operating income Wood Products $ 18,908 $ 36,482 $ 30,538 $ 62,603 Building Materials Distribution 33,800 47,713 51,317 80,101 Total segment operating income 52,708 84,195 81,855 142,704 Unallocated corporate and other (7,576 ) (10,139 ) (15,069 ) (16,844 ) Income from operations $ 45,132 $ 74,056 $ 66,786 $ 125,860 ___________________________________ (a) Primarily represents intersegment sales from our Wood Products segment to our Building Materials Distribution segment.

Nature of Operations and Cons_2

Nature of Operations and Consolidation (Details)	6 Months Ended
	Jun. 30, 2019segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Reportable Segments	2

Summary of Significant Accoun_4

Summary of Significant Accounting Policies:Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Revenue from External Customer [Line Items]
Customer Rebates and Allowances	$ 51.9		$ 51.9		$ 52.1
Building Materials Distribution [Member] | Shipping and Handling [Member]
Revenue from External Customer [Line Items]
Cost of Goods and Services Sold	$ 43.4	$ 40.8	$ 80.3	$ 74.3

Summary of Significant Accoun_5

Summary of Significant Accounting Policies Summary of Significant Accounting Policies:Vendor Rebates and Allowances (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Vendor Rebates and Allowances	$ 6.1	$ 9.7

Summary of Significant Accoun_6

Summary of Significant Accounting Policies:Inventory Valuation (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Inventory, Net [Abstract]
Finished goods and work in process	$ 445,321	$ 441,774
Logs	40,837	54,301
Other raw materials and supplies	38,293	36,974
Inventories	$ 524,451	$ 533,049

Summary of Significant Accoun_7

Summary of Significant Accounting Policies:Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,070,961		$ 1,064,339
Less accumulated depreciation	(606,866)		(577,115)
Property and equipment, net	464,095	$ 465,492	487,224
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	39,304		38,888
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	137,050		164,878	[1]
Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	58,477		49,509
Mobile equipment, information technology, and office furniture [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	155,117		150,712
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	643,818		629,337
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 37,195		$ 31,015
[1]	As of December 31, 2018 , capital lease assets were included in the "Buildings" asset class. For additional information related to leases, see Note 8, Leases.

Summary of Significant Accoun_8

Summary of Significant Accounting Policies:Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Reported Value Measurement [Member] | 5.625% Senior Notes Due 2024 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Fixed-rate debt	$ 350	$ 350
Level 2 [Member] | Estimate of Fair Value Measurement [Member] | 5.625% Senior Notes Due 2024 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Fixed-rate debt	355.7	328.1
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Cash equivalents, fair value	$ 167.3	$ 160.4

Summary of Significant Accoun_9

Summary of Significant Accounting Policies:Interest Rate Risk and Interest Rate Swaps (Details) - USD ($) $ in Thousands	1 Months Ended
	Nov. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Mar. 31, 2016	Feb. 16, 2016
Interest Rate Derivatives [Line Items]
Long-term debt		$ 439,986	$ 439,428
Term Loans Due 2022 and 2026 [Member]
Interest Rate Derivatives [Line Items]
Long-term debt		95,000
Term Loan Due 2026 [Member]
Interest Rate Derivatives [Line Items]
Liquidation of Derivative Notional Amount	$ 30,000
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] | Level 2 [Member] | Other assets [Member]
Interest Rate Derivatives [Line Items]
Fair value of interest rate swap agreements, Asset		1,200	3,800
Interest Rate Swap - $50 million notional amount fixed at 1.007% [Member] | Not Designated as Hedging Instrument [Member]
Interest Rate Derivatives [Line Items]
Interest rate swaps, notional amount					$ 50,000
Interest rate swaps, fixed interest rate					1.007%
Interest Rate Swap - $45 million notional amount fixed at 1.256% [Member] | Not Designated as Hedging Instrument [Member]
Interest Rate Derivatives [Line Items]
Interest rate swaps, notional amount				$ 45,000
Interest rate swaps, fixed interest rate				1.256%
Interest Rate Swap - $75 million notional amount fixed at 1.256% [Member] | Not Designated as Hedging Instrument [Member]
Interest Rate Derivatives [Line Items]
Interest rate swaps, notional amount				$ 75,000
Interest rate swap – $50 million and $45 million notional amount fixed at 1.007% and 1.256% [Member] | Not Designated as Hedging Instrument [Member]
Interest Rate Derivatives [Line Items]
Interest rate swaps, notional amount		$ 95,000	$ 95,000

Summary of Significant Accou_10

Summary of Significant Accounting Policies:Concentration of Credit Risk (Details) - Accounts Receivable [Member] - Credit Concentration Risk [Member]	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Customer Two [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	14.00%	13.00%
Customer One [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	14.00%	11.00%

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income tax provision	$ 9,751	$ 13,835	$ 12,951	$ 23,625
Effective income tax rate (as a percent)	26.00%	24.90%	24.90%	23.00%
Statutory U.S. income tax rate (as a percent)	21.00%	21.00%	21.00%	21.00%
Income taxes paid (refunds), net			$ (10,600)	$ 6,500

Net Income Per Common Share (De

Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income	$ 27,718	$ 11,389	$ 41,825	$ 37,050	$ 39,107	$ 78,875
Computation of basic and diluted net income per common share
Weighted average common shares outstanding during the period (for basic calculation)	39,087		38,981		38,986	38,880
Dilutive effect of other potential common shares	112		422		199	504
Weighted average common shares and potential common shares (for diluted calculation)	39,199		39,403		39,185	39,384
Net income per common share - Basic	$ 0.71		$ 1.07		$ 1	$ 2.03
Net income per common share - Diluted	$ 0.71		$ 1.06		$ 1	$ 2
Stock awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive stock awards	200		0		200	100

Acquisition (Details)

Acquisition (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill	$ 60,342	$ 59,159
BMD Birmingham Acquisition [Member]
Business Acquisition [Line Items]
Purchase price of acquisition	15,700
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable	5,600
Inventories	3,398
Other assets	12
Property and equipment	3,487
Lease right-of-use assets	359
Customer relationships	2,100
Goodwill	1,183
Assets acquired	16,139
Accounts payable	105
Lease liabilities	359
Liabilities assumed	464
Net assets acquired	$ 15,675
Customer Relationships [Member] | BMD Birmingham Acquisition [Member]
Business Acquisition [Line Items]
Customer relationship, useful life	10 years

Sale of Manufacturing Facility

Sale of Manufacturing Facility (Details) - USD ($) $ in Thousands	Mar. 01, 2019	Dec. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of facilities			$ 2,493	$ 0
Agreement to Sell Hardwood Facility at Moncure, North Carolina [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Revenue			5,500	17,100
Disposal Group, Operating Loss			$ (1,400)	$ (2,200)
Proceeds from sale of facilities	$ 2,500
Moncure impairment and sale-related losses		$ 24,000

Debt_Summary Table (Details)

Debt:Summary Table (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Deferred financing costs	$ (5,014)	$ (5,572)
Long-term debt	439,986	439,428
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	0	0
Asset based Credit Facility Term Loan Due 2022
Debt Instrument [Line Items]
Long-term Debt, Gross	50,000	50,000
Term Loan Due 2026 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	45,000	45,000
5.625% Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 350,000	$ 350,000

Debt Asset-Based Revolving Cred

Debt Asset-Based Revolving Credit Facility (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	May 15, 2015
AssetBasedCreditFacility [Member]
Line of Credit Facility [Line Items]
Fixed charge coverage ratio requirement, if availability falls below 10% of aggregate lending commitments (as a percent)	100.00%
Threshold of availability as a percentage of aggregate lending commitments, below which 1:1 fixed charge coverage ratio must be met	10.00%
Threshold of availability, below which 1:1 fixed charge coverage ratio must be met	$ 37,000
Current availability	$ 365,400
Dividend restriction, single threshold, percentage of aggregate Revolver Commitments	25.00%
Dividend restriction, combination thresholds, percentage of aggregate Revolver Commitments	15.00%
Dividend restriction, combination thresholds, fixed-charge coverage ratio (as a percent)	100.00%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 370,000
Commitment fee rate (as a percentage)	0.25%
Amount outstanding on Revolving Credit Facility	$ 0	$ 0
Letters of credit outstanding	$ 4,600	$ 4,600
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable interest rate	1.25%
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable interest rate	1.75%
Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable interest rate	0.25%
Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable interest rate	0.75%
Asset based Credit Facility Term Loan Due 2022
ABL Term Loan [Abstract]
Debt Instrument, Face Amount			$ 50,000
Debt Instrument, Interest Rate During Period	4.22%
Debt Instrument, Interest Rate During Period With Patronage Credits	3.20%
Asset based Credit Facility Term Loan Due 2022 | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable interest rate	1.75%
Asset based Credit Facility Term Loan Due 2022 | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable interest rate	2.25%
Asset based Credit Facility Term Loan Due 2022 | Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable interest rate	0.75%
Asset based Credit Facility Term Loan Due 2022 | Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable interest rate	1.25%

Debt_Term Loan (Details)

Debt:Term Loan (Details) $ in Thousands	6 Months Ended		11 Months Ended	12 Months Ended
	Jun. 30, 2019USD ($)Integer9	Jun. 30, 2018USD ($)	Nov. 30, 2018	Dec. 31, 2016USD ($)	Mar. 30, 2016USD ($)
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 5,500	$ 7,500
Term Loan Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 75,000
Debt Instrument, Periodic Payment, Principal	$ 10,000
Debt Instrument, Date of First Required Payment	Mar. 30, 2022
Debt Instrument, Frequency of Periodic Payment	annual
Debt Instrument, Unused Borrowing Capacity, Amount				$ 30,000
Debt Instrument, Unused Borrowing Capacity, Fee (as a percentage)			0.325%
Repayments of Long-term Debt				$ 30,000
Debt Instrument, Covenant, Capitalization Ratio, Maximum (as a percent)	60.00%
Debt Instrument, Covenant, Consolidated Net Worth, Minimum	$ 350,000
Debt Instrument, Covenant, Available Liquidity, Minimum	100,000
Threshold of amount of capital expenditures made during four consecutive quarters, maximum	$ 50,000
Number of Consecutive Quarters Within Which Maximum Threshold Amount Of Capital Expenditures Applies | Integer9	4
Dividend restriction, interest coverage ratio (as a percent)	300.00%
Dividend restriction, fixed-charge coverage ratio (as a percent)	100.00%
Debt Instrument, Interest Rate During Period	4.36%
Debt Instrument, Interest Rate During Period With Patronage Credits	3.40%
Term Loan Due 2026 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate	1.875%
Term Loan Due 2026 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate	2.125%
Term Loan Due 2026 [Member] | Base Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate	0.875%
Term Loan Due 2026 [Member] | Base Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate	1.125%

Debt_2024 Notes (Details)

Debt:2024 Notes (Details) - 5.625% Senior Notes Due 2024 [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Aug. 29, 2016
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 350
Interest rate		5.625%
Dividend restriction, interest coverage ratio (as a percent)	350.00%

Debt_Cash Paid for Interest (De

Debt:Cash Paid for Interest (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Debt Disclosure [Abstract]
Interest Paid	$ 11.5	$ 11.6

Leases_Topic 842 Adoption (Deta

Leases:Topic 842 Adoption (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liabilities	$ 69,241	$ 72,400
Retained earnings	362,057		$ 330,056
Property and equipment, net	464,095	465,492	487,224
Operating lease right-of-use assets	65,989	69,155	0
Finance lease right-of-use assets	20,301	20,872	0
Prepaid expenses and other	17,745	31,572	31,818
Accrued liabilities, other	77,256	72,372	63,509
Operating lease liabilities, net of current portion	60,289	63,498	0
Finance lease liabilities, net of current portion	21,701	21,921	0
Other long-term liabilities	13,721	12,671	$ 38,904
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		0
Property and equipment, net		(21,732)
Operating lease right-of-use assets		69,155
Finance lease right-of-use assets		20,872
Prepaid expenses and other		(246)
Accrued liabilities, other		8,863
Operating lease liabilities, net of current portion		63,498
Finance lease liabilities, net of current portion		21,921
Other long-term liabilities		$ (26,233)
If Accounting Standards Update 2016-02 was Not Adopted [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net	485,232
Operating lease right-of-use assets	0
Finance lease right-of-use assets	0
Prepaid expenses and other	17,991
Accrued liabilities, other	68,304
Operating lease liabilities, net of current portion	0
Finance lease liabilities, net of current portion	0
Other long-term liabilities	39,756
Impact of Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net	(21,137)
Operating lease right-of-use assets	65,989
Finance lease right-of-use assets	20,301
Prepaid expenses and other	(246)
Accrued liabilities, other	8,952
Operating lease liabilities, net of current portion	60,289
Finance lease liabilities, net of current portion	21,701
Other long-term liabilities	$ (26,035)

Leases_Terms (Details)

Leases:Terms (Details)	6 Months Ended
	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Minimum initial term of real estate leases	1 year
Real Estate Leases, Cancellation Notice, Latest Notice	30 days
Real Estate Leases, Cancellation Notice, Earliest Notice	90 days
Minimum [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Renewal Term	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Renewal Term	10 years

Leases_Costs (Details)

Leases:Costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 3,367	$ 6,708
Amortization of right-of-use assets	385	760
Interest on lease liabilities	465	926
Variable lease cost	722	1,341
Short-term lease cost	1,075	2,069
Sublease income	(172)	(304)
Total lease cost	$ 5,842	$ 11,500

Leases_Other Information (Detai

Leases:Other Information (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee Disclosure [Abstract]
Operating cash flows from operating leases		$ 6,637
Operating cash flows from finance leases		926
Financing cash flows from finance leases		369
Right-of-use assets obtained in exchange for lease obligations, operating leases		1,368
Right-of-use assets obtained in exchange for lease obligations, finance leases		$ 310
Weighted-average remaining lease term, operating leases		9 years
Weighted-average remaining lease term, finance leases		15 years
Weighted-average discount rate, operating leases	[1]	6.50%
Weighted-average discount rate, finance leases		8.80%
Operating Lease Liabilities, Payments Due [Abstract]
Remainder of 2019		$ 6,608
2020		12,878
2021		11,741
2022		10,374
2023		10,045
Thereafter		41,338
Total future minimum lease payments		92,984
Less: interest		(23,743)
Total lease obligations		69,241	$ 72,400
Less: current obligations		(8,952)
Long-term lease obligations		60,289	63,498	$ 0
Finance Lease Liabilities, Payments, Due [Abstract]
Remainder of 2019		1,344
2020		2,713
2021		2,753
2022		2,747
2023		2,769
Thereafter		30,177
Total future minimum lease payments		42,503
Less: interest		(19,951)
Total lease obligations		22,552
Less: current obligations		(851)
Long-term lease obligations		$ 21,701	$ 21,921	$ 0
[1]	Upon adoption of the new lease standard, discount rates used for existing leases were established at January 1, 2019.

Leases_Topic 840 Disclosure (De

Leases:Topic 840 Disclosure (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2018
Operating Leases, Rent Expense, Net [Abstract]
Rent expense	$ 4,600	$ 9,200
Capital Leases, Future Minimum Payments, Net Minimum Payments, Fiscal Year Maturity [Abstract]
2019			$ 2,578
2020			2,617
2021			2,656
2022			2,694
2023			2,740
Thereafter			30,177
Total			43,462
Less: interest on capital lease obligations			(20,838)
Total principal payable on capital lease obligations			22,624
Less: current obligations			(703)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2019			13,222
2020			12,734
2021			11,595
2022			10,208
2023			9,800
Thereafter			40,381
Total			97,940
Other Noncurrent Liabilities [Member]
Capital Leases, Future Minimum Payments, Net Minimum Payments, Fiscal Year Maturity [Abstract]
Long-term capital lease obligations			$ 21,921
Building [Member]
Property, Plant and Equipment [Line Items]
Lessee, Capital Lease, Term of Contract		20 years
Capital Lease Obligations Incurred		$ 14,300

Retirement and Benefit Plans (D

Retirement and Benefit Plans (Details) - USD ($) $ in Thousands	Apr. 25, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net periodic benefit cost [Abstract]
Net periodic benefit expense				$ 911	$ 13,026
Pension contributions [Abstract]
Pension contributions				927	1,042
Pension Plan [Member]
Net periodic benefit cost [Abstract]
Service cost		$ 161	$ 198	322	403
Interest cost		1,809	3,312	3,625	7,323
Expected return on plan assets		(1,475)	(3,292)	(2,949)	(7,880)
Amortization of actuarial (gain) loss		(44)	356	(87)	1,177
Plan settlement loss		0	12,003	0	12,003
Net periodic benefit expense		451	$ 12,577	911	$ 13,026
Pension contributions [Abstract]
Pension contributions				900
Estimated remaining 2019 pension contributions		$ 900		$ 900
Group annuity transactions	$ 151,800
Percentage of defined benefit plan assets transferred out of the plan	33.00%

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
		Feb. 28, 2019stock_awards	Feb. 28, 2018stock_awards	Jun. 30, 2019USD ($)$ / sharesshares	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)tranch$ / sharesshares	Jun. 30, 2018USD ($)shares	Dec. 31, 2018$ / sharesshares
Stock-Based Compensation [Abstract]
Number of types of stock-based awards granted (in types) | stock_awards		2	2
Fair market value of awards | $						$ 11,400	$ 15,200
Stock-based compensation expense | $				$ 1,869	$ 2,445	4,069	4,731
Tax benefit from compensation expense | $						1,000	1,200
Unrecognized compensation expense | $				10,900		$ 10,900
Unrecognized compensation, period for recognition						1 year 10 months 24 days
Performance Shares [Member]
Stock-Based Compensation [Abstract]
Stock-based compensation expense | $				$ 736	1,231	$ 1,715	$ 2,318
Number of shares [Abstract]
Outstanding, December 31, 2018 | shares						429,788
Granted | shares						110,923	78,976
Performance condition adjustment, net (a) | shares	[1]					1,443
Vested | shares						(223,706)
Forfeited | shares						(19,545)
Outstanding, June 30, 2019 | shares				298,903		298,903		429,788
Weighted Average Grant Date Fair Value [Abstract]
Outstanding, December 31, 2018 | $ / shares						$ 25.90
Granted | $ / shares						29.48
Performance condition adjustment, net (a) | $ / shares	[1]					43.05
Vested | $ / shares						19.97
Forfeited | $ / shares						35.97
Outstanding, June 30, 2019 | $ / shares				$ 31.09		$ 31.09		$ 25.90
Restricted Stock Units (RSUs) [Member]
Stock-Based Compensation [Abstract]
Stock-based compensation expense | $				$ 1,133	$ 1,214	$ 2,354	$ 2,413
Number of shares [Abstract]
Outstanding, December 31, 2018 | shares						289,173
Granted | shares						166,180	99,087
Performance condition adjustment, net (a) | shares						0
Vested | shares						(183,311)
Forfeited | shares						(13,136)
Outstanding, June 30, 2019 | shares				258,906		258,906		289,173
Weighted Average Grant Date Fair Value [Abstract]
Outstanding, December 31, 2018 | $ / shares						$ 29.52
Granted | $ / shares						29.06
Performance condition adjustment, net (a) | $ / shares						0
Vested | $ / shares						26.43
Forfeited | $ / shares						35.34
Outstanding, June 30, 2019 | $ / shares				$ 31.11		$ 31.11		$ 29.52
Officer [Member]
Stock-Based Compensation [Abstract]
Performance Shares that could be awarded, as a percentage of ROIC target amount, minimum						0.00%
Performance Shares that could be awarded, as a percentage of ROIC target amount, maximum						200.00%
Vesting period (in years)						3 years
Performance Shares Target Percentage Earned, Officers								100.00%
Other employees [Member]
Stock-Based Compensation [Abstract]
Performance Shares that could be awarded, as a percentage of EBITDA target amount, minimum						0.00%
Performance Shares that could be awarded, as a percentage of EBITDA target amount, maximum						200.00%
Number of equal tranches for annual vesting (in tranches) | tranch						3
Performance Shares Target Percentage Earned, Other Employees								110.00%
Officers and other employees [Member] | Restricted Stock Units (RSUs) [Member]
Stock-Based Compensation [Abstract]
Number of equal tranches for annual vesting (in tranches) | tranch						3
Nonemployee Directors [Member] | Restricted Stock Units (RSUs) [Member]
Stock-Based Compensation [Abstract]
Vesting period (in years)						1 year
[1]	Represents additional PSUs granted to non-officers based on achievement of 2018

Stockholders' Equity_Shares and

Stockholders' Equity:Shares and Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 01, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Subsequent Event [Line Items]
Dividends declared per common share		$ 0.09	$ 0.09	$ 0.07	$ 0.07	$ 0.18	$ 0.14
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common Stock, Dividends, Per Share, Cash Paid		$ 0.09	$ 0.09	$ 0.07	$ 0.07
Dividends paid on common stock						$ 7,562	$ 5,481
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends Payable, Date Declared	Aug. 1, 2019
Dividends declared per common share	$ 0.09
Dividends Payable, Date to be Paid	Sep. 16, 2019
Dividends Payable, Date of Record	Sep. 3, 2019

Stockholders' Equity_AOCI (Deta

Stockholders' Equity:AOCI (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance, net of taxes		$ 679,017	$ 707,052	$ 672,590	$ 674,549
Net actuarial gain, before taxes		0	13,340	0	13,340
Amortization of actuarial (gain) loss, before taxes (a)	[1]	(44)	356	(87)	1,177
Effect of settlements, before taxes (a)	[1]	0	12,003	0	12,003
Income taxes		11	(6,517)	22	(6,725)
Ending balance, net of taxes		705,021	768,188	705,021	768,188
Accumulated Other Comprehensive Loss [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance, net of taxes		(47,684)	(76,089)	(47,652)	(76,702)
Ending balance, net of taxes		$ (47,717)	$ (56,907)	$ (47,717)	$ (56,907)
[1]	Represents amounts reclassified from accumulated other comprehensive loss. These amounts are included in the computation of net periodic pension cost. For additional information, see Note 9, Retirement and Benefit Plans.

Transactions With Related Par_2

Transactions With Related Party (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Unconsolidated variable interest entity [Member]
Related Party Transaction [Line Items]
Revenue from related party	$ 4.3	$ 4.6	$ 8.8	$ 8.9
Cost of sales from related party	$ 21.4	$ 22.6	$ 41.4	$ 43
LouisianaTimberProcurementCompanyLLC [Member] | Unconsolidated variable interest entity [Member]
Related Party Transaction [Line Items]
Variable interest entity, ownership percentage			50.00%
LouisianaTimberProcurementCompanyLLC [Member] | Packaging Corporation of America (PCA) [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Related Party Transaction [Line Items]
Variable interest entity, ownership percentage			50.00%

Segment Information Segment Sal

Segment Information Segment Sales to External Customers by Product Line (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)segment	Jun. 30, 2018USD ($)
Segment Reporting [Abstract]
Number of Reportable Segments | segment				2
Revenue from External Customer [Line Items]
Sales		$ 1,230,081	$ 1,408,132	$ 2,272,167	$ 2,590,973
Wood Products and Building Materials Distribution [Member]
Revenue from External Customer [Line Items]
Sales		1,230,100	1,408,100	2,272,200	2,591,000
Wood Products [Member]
Revenue from External Customer [Line Items]
Sales		132,700	194,300	$ 267,100	384,800
Intersegment EWP Sales Volumes As Percentage to Total EWP Sales Volumes				76.00%
Wood Products [Member] | Laminated Veneer Lumber [Member]
Revenue from External Customer [Line Items]
Sales	[1]	12,000	9,800	$ 23,900	23,200
Wood Products [Member] | I-joists [Member]
Revenue from External Customer [Line Items]
Sales	[1]	8,000	7,900	13,300	17,800
Wood Products [Member] | Other Engineered Wood Products [Member]
Revenue from External Customer [Line Items]
Sales	[1]	8,600	5,800	14,300	12,300
Wood Products [Member] | Plywood and veneer [Member]
Revenue from External Customer [Line Items]
Sales	[1]	63,500	96,700	130,900	183,700
Wood Products [Member] | Lumber [Member]
Revenue from External Customer [Line Items]
Sales	[1]	14,000	25,000	27,200	49,900
Wood Products [Member] | Byproducts [Member]
Revenue from External Customer [Line Items]
Sales	[1]	18,000	22,800	38,000	44,900
Wood Products [Member] | Particleboard [Member]
Revenue from External Customer [Line Items]
Sales	[1]	0	11,800	0	22,600
Wood Products [Member] | Other - Wood Products [Member]
Revenue from External Customer [Line Items]
Sales	[1]	8,600	14,700	19,400	30,200
Building Materials Distribution [Member]
Revenue from External Customer [Line Items]
Sales		1,097,400	1,213,800	2,005,100	2,206,100
Building Materials Distribution [Member] | Commodity product line [Member]
Revenue from External Customer [Line Items]
Sales		450,700	602,700	849,000	1,093,200
Building Materials Distribution [Member] | General line [Member]
Revenue from External Customer [Line Items]
Sales		429,600	392,900	753,100	708,100
Building Materials Distribution [Member] | Engineered wood products [Member]
Revenue from External Customer [Line Items]
Sales		$ 217,200	$ 218,200	$ 403,000	$ 404,800
[1]	Amounts represent sales to external customers. Sales are calculated after intersegment sales eliminations to our Building Materials Distribution segment, as well as the cost of EWP rebates and sales allowances provided at various stages of the supply chain (including distributors, retail lumberyards, and professional builders). For the six months ended June 30, 2019 , approximately 76% of Wood Products' EWP sales volumes were to our Building Materials Distribution segment.

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Sales		$ 1,230,081	$ 1,408,132	$ 2,272,167	$ 2,590,973
Income from operations		45,132	74,056	66,786	125,860
Wood Products [Member]
Segment Reporting Information [Line Items]
Sales		132,700	194,300	267,100	384,800
Building Materials Distribution [Member]
Segment Reporting Information [Line Items]
Sales		1,097,400	1,213,800	2,005,100	2,206,100
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income from operations		52,708	84,195	81,855	142,704
Operating Segments [Member] | Wood Products [Member]
Segment Reporting Information [Line Items]
Sales		334,256	425,483	653,779	823,474
Income from operations		18,908	36,482	30,538	62,603
Operating Segments [Member] | Building Materials Distribution [Member]
Segment Reporting Information [Line Items]
Sales		1,097,421	1,213,783	2,005,129	2,206,164
Income from operations		33,800	47,713	51,317	80,101
Intersegment Eliminations and Other [Member]
Segment Reporting Information [Line Items]
Sales	[1]	(201,596)	(231,134)	(386,741)	(438,665)
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Income from operations		$ (7,576)	$ (10,139)	$ (15,069)	$ (16,844)
[1]	Primarily represents intersegment sales from our Wood Products segment to our Building Materials Distribution segment.