Acquisition (Purchase Price Allocation) (Details) (USD $) In Thousands, unless otherwise specified					0 Months Ended		0 Months Ended
	Jun. 30, 2013	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2011	Oct. 31, 2012 Etherios [Member]	Oct. 31, 2012 Existing Customer Relationships [Member] Etherios [Member]	Oct. 31, 2012 Existing Customer Relationships [Member] Etherios [Member] Minimum [Member]	Oct. 31, 2012 Existing Customer Relationships [Member] Etherios [Member] Maximum [Member]	Oct. 31, 2012 Non-compete Agreements [Member] Etherios [Member]	Oct. 31, 2012 Trade Name [Member] Etherios [Member]	Oct. 31, 2012 Order Backlog [Member] Etherios [Member]
Business Acquisition [Line Items]
Cash, including cash in escrow					$ 13,696
Common stock					6,804
Total					20,500
Fair value of net tangible assets acquired					1,367
Identifiable intangibles assets						1,400			1,100	440	360
Goodwill	102,611	86,209	85,544	86,012	17,120
Deferred tax liabilities related to identifiable intangibles					(1,287)
Total					$ 20,500
Weighted Average Useful Life					5 years 8 months 12 days
Useful life							6 years	8 years	5 years	7 years	1 year