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Earnings Per Share (Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details) (Stock Option [Member], USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Number of shares 0 1,522,100 2,290,200
Minimum [Member]
     
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Range of exercise prices $ 0 $ 11.35 $ 10.65
Maximum [Member]
     
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Range of exercise prices $ 0 $ 14.34 $ 14.34