Quarterly report pursuant to Section 13 or 15(d)

Business and Summary of Significant Accounting Principles (Shares outstanding which are contingent) (Details)

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Business and Summary of Significant Accounting Principles (Shares outstanding which are contingent) (Details)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Class of Stock [Line Items]    
Weighted Average Number of Shares, Contingently Issuable 58 8