Annual report pursuant to Section 13 and 15(d)

Business and Summary of Significant Accounting Principles (Weighted Average Shares Outstanding Which Are Anti-Dilutive) (Details)

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Business and Summary of Significant Accounting Principles (Weighted Average Shares Outstanding Which Are Anti-Dilutive) (Details) - shares
shares in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Shares associated with anti-dilutive 858 55 176
Stock Appreciation Rights (SARs)      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Shares associated with anti-dilutive 724 0 0
Stock Options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Shares associated with anti-dilutive 108 29 86
Stock Compensation Plan [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Shares associated with anti-dilutive 26 26 90