Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual )

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Income Taxes (Details Textual ) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes (Textual) [Abstract]      
Less: valuation allowance $ 0    
Effective tax rates 28.80% 27.10% 27.20%
Tax credits totaled $ 217,000 $ 203,000 $ 132,000