Income Taxes (Tables)

3 Months Ended

Sep. 30, 2012

Income Tax Disclosure [Abstract]

Combined Federal And State Effective Income Tax Rates Table Textblock

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
Combined federal and state effective income tax rates	26.8	%	28.8	%	23.9	%	29.9	%