Business Overview (Details)	3 Months Ended
	Dec. 31, 2016 employee location	Dec. 31, 2015
Concentration Risk [Line Items]
Number of employees (employee) | employee	1,400
Minimum number of locations in which entity operates (location) | location	30
US Government [Member] | Revenue concentration | Customer concentration
Concentration Risk [Line Items]
Concentration risk percentage (percent)	100.00%
Human Services and Solutions [Member] | Revenue concentration | Customer concentration
Concentration Risk [Line Items]
Concentration risk percentage (percent)	29.00%
Department of Veterans Affairs [Member] | Revenue concentration | Customer concentration
Concentration Risk [Line Items]
Concentration risk percentage (percent)	61.00%	95.00%