Property and Equipment	3 Months Ended
Mar. 31, 2013
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment are net of accumulated depreciation of $196.9 million and $190.5 million at March 31, 2013 and December 31, 2012, respectively.

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

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