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Sale of Properties (Notes) | 12 Months Ended
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Dec. 31, 2014
Sale of Properties [Abstract] |
Property Plant And Equipment Significant Disposals [Text Block] | Sale of Properties In 2012, in conjunction with the construction of a new distribution center in McCook, Illinois and the relocation of the Company’s headquarters to Chicago, Illinois, the Company sold four properties; its Addison, Illinois distribution center, its Vernon Hills, Illinois distribution center, its former Des Plaines, Illinois headquarters and a Des Plaines, Illinois administrative building. The Company received cash proceeds of $12.3 million for the sale of the four properties, resulting in a gain of $3.7 million.

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