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Summary of Significant Accounting Policies (Stock-Based Compensation Plans) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award      
Total stock compensation expense $ 1.5 $ 1.4 $ 1.4
Omnibus Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award      
Shares reserved for future issuance 700,000