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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Preferred Stock, Par or Stated Value Per Share $ 0.0001000000 $ 0.0001000000
Preferred stock, authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 0 0
Common Stock, Par or Stated Value Per Share $ 0.0001000000 $ 0.0001000000
Common stock, authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 24,223,191.000000 24,193,098.000000
Treasury stock, shares (in shares) 7,736,255.000000 6,380,309.000000