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Acquisitions and Divestitures	6 Months Ended
Acquisitions and Divestitures	Jun. 30, 2018
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures As part of the Corporation's ongoing business strategy, it continues to acquire and divest small office furniture dealerships, for which the impact is not material to the Corporation's financial statements.