Basis of Presentation (Policies)	3 Months Ended
Basis of Presentation (Policies)	Apr. 01, 2017
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 net realizable value with approximately 83 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.
Recently Adopted Accounting Standards	In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting. The new standard is intended to simplify accounting for share based employment awards to employees. Changes include: all excess tax benefits/deficiencies should be recognized as income tax expense/benefit; entities can make elections on how to account for forfeitures; and cash paid by an employer when directly withholding shares for tax withholding purposes should be classified as a financing activity on the cash flow statement. The Corporation implemented the new standard in the first quarter of fiscal 2017. The primary impact of implementation was the recognition of excess tax benefits in our provision for income taxes rather than paid-in capital beginning with the first quarter of fiscal 2017. Excess tax benefits will be recorded in the operating section of the Condensed Consolidated Statements of Cash Flows on a prospective basis. Prior to fiscal 2017, the tax benefits or shortfalls were recorded in financing cash flows. The presentation requirements for cash flows related to employee taxes paid for withheld shares in the financing section had no impact to any of the periods presented in our Condensed Consolidated Statements of Cash Flows since such cash flows have historically been presented as a financing activity. Implementation of the new standard resulted in the recognition of excess tax benefits in the Corporation's provision for income taxes of $0.6 million as a net tax benefit for the three months ended April 1, 2017. Prior to the adoption of this standard, that amount would have been recognized as an adjustment to "Additional paid-in capital" in the Condensed Consolidated Balance Sheets. See "Note 10. Income Taxes" in the Notes to Condensed Consolidated Financial Statements for further information. In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory. The new standard is intended to simplify the subsequent measurement of inventory by requiring inventory to be measured at the lower of cost or net realizable value rather than the previous guidance of measuring inventory at the lower of cost or market. The Corporation implemented the new standard in the first quarter of fiscal 2017. As the Corporation previously calculated net realizable value when measuring inventory at the lower of cost or market, this standard had an immaterial effect on the condensed consolidated financial statements and related disclosures. In January 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other (Topic 350). The new standard is to simplify the test for goodwill impairment by eliminating the step 2 requirement. Instead, an entity will perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. The standard is effective for fiscal 2020, but the Corporation has early adopted the standard in 2017. There is no impact in the first quarter of 2017.
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 metal and wood commercial and home office furniture which includes storage products, desks, credenzas, chairs, tables, bookcases, freestanding office partitions and panel systems and other related products. The hearth products segment manufactures and markets a broad line of gas, electric, wood and biomass burning fireplaces, inserts, stoves, facings and accessories, principally for the home. 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 costs 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.