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Consolidated Balance Sheets Consolidated Balance Sheet (Parentheticals) - $ / shares
Dec. 31, 2016
Dec. 31, 2015
Preferred Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Preferred Stock, Shares Authorized 1,000,000 1,000,000
Preferred Stock, Shares Issued 0 0
Preferred Stock, Shares Outstanding 0 0
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Common Stock, Shares Authorized 50,000,000 50,000,000
Common Stock, Shares, Issued 25,662,950 25,705,888
Treasury Stock, Shares 4,257,915 2,291,095