Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Jul. 02, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Stock-Based Compensation	The Corporation measures stock-based compensation expense at grant date, based on the fair value of the award, and recognizes expense over the employees' requisite service periods.
Inventories	The Corporation values its inventory at the lower of cost or market with approximately 75 percent valued by the last-in, first-out ("LIFO") costing method.
Goodwill and Other Intangible Assets	The Corporation evaluates its goodwill and indefinite-lived intangible assets for impairment on an annual basis during the fourth quarter, or whenever indicators of impairment exist. The Corporation estimates the fair value of its reporting units using various valuation techniques, with the primary technique being a discounted cash flow method. This method employs market participant based assumptions.
Product Warranties	The Corporation issues certain warranty policies on its office furniture and hearth products that provide for repair or replacement of any covered product or component that fails during normal use because of a defect in design or workmanship. Reserves have been established for the various costs associated with the Corporation's warranty programs. A warranty reserve is determined by recording a specific reserve for known warranty issues and an additional reserve for unknown claims that are expected to be incurred based on historical claims experience. Actual claims incurred could differ from the original estimates, requiring adjustments to the reserve.
Fair Value Measurements	For recognition purposes, on a recurring basis the Corporation is required to measure at fair value its marketable securities and derivative instruments. The marketable securities are comprised of government securities, corporate bonds and money market funds. When available the Corporation uses quoted market prices to determine fair value and classifies such measurements within Level 1. Where market prices are not available, the Corporation makes use of observable market-based inputs (prices or quotes from published exchanges and indexes) to calculate fair value using the market approach, in which case the measurements are classified within Level 2.
New Accounting Standards	In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") No. 2015-05, Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. The ASU applies to cloud computing arrangements including software as a service, platform as a service, infrastructure as a service, and other similar hosting arrangements, and was issued to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement. The ASU provides guidance about whether the arrangement includes a software license. The core principle of the ASU is that if a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The guidance did not change U.S. GAAP for a customer’s accounting for service contracts. The Corporation adopted the guidance effective January 3, 2016, the beginning of the Corporation's 2016 fiscal year. The guidance did not have a material impact on the Corporation's financial statements. The FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30) - Simplifying Presentation of Debt Issuance Costs in April 2015, which was further clarified by ASU No. 2015-15 in August 2015. The core principle of the ASUs is that an entity should present debt issuance costs as a direct deduction from the face amount of that debt in the balance sheet similar to the manner in which a debt discount or premium is presented, and not reflected as a deferred charge or deferred credit. The ASU requires additional disclosure about the nature of and reason for the change in accounting principle, the transition method, a description of the prior-period information that has been retrospectively adjusted and the effect of the change on the financial statement line item (that is, the debt issuance cost asset and the debt liability). Debt issuance costs related to line-of-credit arrangements can still be presented as assets and subsequently amortized. The Corporation adopted the guidance effective January 3, 2016, the beginning of the Corporation's 2016 fiscal year. The guidance did not have an impact on the Corporation's financial statements.
Business Segment Information	Management views the Corporation as being in two reportable segments based on industries: office furniture and hearth products, with the former being the principal business segment. The aggregated office furniture segment manufactures and markets a broad line of office furniture which includes storage products, desks, credenzas, chairs, tables, bookcases, classroom solutions, freestanding office partitions and panel systems and other related products. The hearth products segment manufactures and markets a broad line of manufactured gas, electric, wood and pellet fireplaces, inserts and stoves, facings and accessories. For purposes of segment reporting, intercompany sales between segments are not material and operating profit is income before income taxes exclusive of certain unallocated corporate expenses. These unallocated corporate expenses include the net cost of the Corporation's corporate operations, interest income and interest expense. Management views interest income and expense as corporate financing costs and not as a reportable segment cost. In addition, management applies an effective income tax rate to its consolidated income before income taxes so income taxes are not reported or viewed internally on a segment basis. Identifiable assets by segment are those assets applicable to the respective industry segments. Corporate assets consist principally of cash and cash equivalents, short-term investments, long-term investments and corporate office real estate and related equipment. No geographic information for revenues from external customers or for long-lived assets is disclosed since the Corporation's primary market and capital investments are concentrated in the United States.