Lease Commitments for Leases having Terms of More than One Year (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Year-ended September 30:
2013	$ 105,287
2014	81,396
2015	49,943
2016	19,741
2017	12,889
Thereafter	21,234
Total	290,490
Property, Plant and Equipment
Year-ended September 30:
2013	13,967
2014	9,099
2015	916
2016	781
2017	671
Thereafter	5,335
Total	30,769
Rental Equipment
Year-ended September 30:
2013	91,320
2014	72,297
2015	49,027
2016	18,960
2017	12,218
Thereafter	15,899
Total	$ 259,721