Commitments and contingencies (Tables)

12 Months Ended

Sep. 30, 2013

Commitments and Contingencies [Abstract]

Schedule of rent expense from operating leases

		Leasing Expense
		$'000s
Fiscal year ended September 30, 2013	$	16,358
Fiscal year ended September 30, 2012		14,888
Fiscal year ended September 30, 2011		12,783

Schedule of future minimum rental payments for operating leases

Year ending September 30,
		$'000s
2014	$	13,499
2015		11,370
2016		9,098
2017		7,428
2018		5,902
Thereafter		18,186
	$	65,483