Debt (Narrative) (Details)	12 Months Ended	6 Months Ended	12 Months Ended			12 Months Ended
	Sep. 30, 2013 Bank Of America And Wells Fargo Facilities [Member] USD ($)	Sep. 30, 2013 Wells Fargo Facility [Member] GBP (£)	Sep. 30, 2013 Wells Fargo Facility [Member] GBP (£)	Sep. 30, 2013 Wells Fargo Facility [Member] USD ($)	Sep. 30, 2013 Overdraft Facility [Member] GBP (£)	Sep. 30, 2013 Minimum [Member] Bank Of America And Wells Fargo Facilities [Member]	Sep. 30, 2012 Minimum [Member] Bank Of America And Wells Fargo Facilities [Member]	Sep. 30, 2013 Minimum [Member] Wells Fargo Facility [Member]	Sep. 30, 2013 Maximum [Member] Bank Of America And Wells Fargo Facilities [Member]	Sep. 30, 2013 Maximum [Member] Wells Fargo Facility [Member]
Line of Credit Facility [Line Items]
Maximum Borrowing Capacity	$ 150,000,000	£ 20,000,000	£ 20,000,000		£ 10,000,000
Debt Instrument, Basis Spread on Variable Rate						0.95%		0.95%	1.50%	1.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage							0.15%	0.15%	0.25%	0.25%
Termination Date	Nov. 01, 2016		Nov. 01, 2016
Line of Credit Facility, Increase (Decrease) in Borrowing Capacity			7,500,000
Amount Outstanding		1,550,000	1,550,000	2,501,000
Interest Rate at Period End	1.06%			1.44%
Line of Credit Facility, Covenant Terms, Minimum Tangible Net Worth		£ 5,000,000