Basis of Presentation (Details)	Sep. 30, 2011	Sep. 30, 2010
Basis of Presentation [Abstract]
Years of evolution from a professional employer organization to a comprehensive business performance solutions provider (in years)	25
Percentage of PEO revenues from the Company's Texas markets (in hundredths)	27.00%	29.00%
Percentage of PEO revenues from the Company's California markets (in hundredths)	16.00%	15.00%