Financing Arrangements (Additional Information) (Detail)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2012
USD ($)
|
Sep. 30, 2013
|
Sep. 30, 2012
USD ($)
|
Apr. 05, 2012
USD ($)
|
Sep. 30, 2013
Revolving Credit Facility [Member]
USD ($)
|
Apr. 05, 2012
Revolving Credit Facility [Member]
USD ($)
|
Apr. 05, 2012
Letter Of Credit [Member]
USD ($)
|
Sep. 30, 2013
Term Loan [Member]
USD ($)
|
Apr. 05, 2012
Term Loan [Member]
USD ($)
|
Sep. 30, 2013
Consolidated Total Leverage Ratio [Member]
|
Sep. 30, 2013
Standby Letters Of Credit [Member]
USD ($)
|
Sep. 30, 2013
Canadian Revolving Credit facility [Member]
USD ($)
|
Sep. 30, 2013
Canadian Revolving Credit facility [Member]
CAD
|
Sep. 30, 2013
Maximum [Member]
|
Sep. 30, 2013
Maximum [Member]
Consolidated Total Leverage Ratio [Member]
|
Sep. 30, 2013
Minimum [Member]
|
Sep. 30, 2013
Minimum [Member]
Consolidated Total Leverage Ratio [Member]
|
Sep. 30, 2013
Term Loan Facilitys [Member]
Maximum [Member]
LIBOR [Member]
|
Sep. 30, 2013
Term Loan Facilitys [Member]
Minimum [Member]
LIBOR [Member]
|
Sep. 30, 2013
Equipment Financing Facility [Member]
USD ($)
|
Sep. 30, 2013
Equipment Financing Facility [Member]
Three Year Term Swap Rate [Member]
|
Sep. 30, 2013
Equipment Financing Facility [Member]
Four Year Term Swap Rate [Member]
|
Sep. 30, 2013
U.S. Senior Secured Credit Facility [Member]
Maximum [Member]
Base Rates [Member]
|
Sep. 30, 2013
U.S. Senior Secured Credit Facility [Member]
Minimum [Member]
Base Rates [Member]
|
Sep. 30, 2013
U.S. Senior Secured Credit Facility [Member]
Term Loan Facilitys [Member]
LIBOR [Member]
|
Sep. 30, 2012
U.S. Senior Secured Credit Facility [Member]
Term Loan Facilitys [Member]
LIBOR [Member]
|
Sep. 30, 2013
Canadian Senior Secured Credit Facility [Member]
Maximum [Member]
|
Sep. 30, 2013
Canadian Senior Secured Credit Facility [Member]
Minimum [Member]
|
Apr. 05, 2012
Wells Fargo Bank National Association [Member]
USD ($)
|
Apr. 05, 2012
Wells Fargo Bank National Association [Member]
CAD
|
|
Debt Instrument [Line Items] | ||||||||||||||||||||||||||||||
Line of credit facility, amount outstanding | $ 550.0 | $ 45.0 | $ 325.0 | $ 20.0 | $ 208.1 | $ 225.0 | $ 7.0 | $ 2.4 | 2.5 | $ 14.6 | 15.0 | |||||||||||||||||||
Line Of Credit Facility Additional Borrowing Capacity | 200 | 200 | ||||||||||||||||||||||||||||
Debt instrument, maximum financing amount | 30 | |||||||||||||||||||||||||||||
Senior notes payable to commercial lenders, interest rate margin | 1.93% | 1.75% | 1.93% | 1.75% | 1.75% | 1.75% | 3.75% | 0.75% | ||||||||||||||||||||||
Line of credit facility, unused fees | 0.375% | 0.50% | 0.35% | |||||||||||||||||||||||||||
Debt instrument, amount outstanding | 10.6 | |||||||||||||||||||||||||||||
Debt instrument, fixed interest rate minimum | 2.51% | |||||||||||||||||||||||||||||
Debt instrument, fixed interest rate maximum | 6.75% | |||||||||||||||||||||||||||||
Percentage Of Amortization Of Term Loan | 5.00% | |||||||||||||||||||||||||||||
Line of Credit Facility, Interest Rate During Period | 0.75% | 2.50% | 1.50% | 1.50% | 0.50% | 1.26% | 1.21% | |||||||||||||||||||||||
Line of Credit Facility, Interest Rate Description | higher of the Prime Rate, or the Federal Funds Rate plus 0.50%, plus a margin above that rate | LIBOR plus 1.75% (1.93% at September 30, 2013) | ||||||||||||||||||||||||||||
Line Of Credit Facility Rate Descriptions | the higher of the Canadian Prime Rate, or the annual rate of interest equal to the sum of the CDOR rate plus 1.0%, plus a margin above that rate. | |||||||||||||||||||||||||||||
Amortization Frequency | quarterly | |||||||||||||||||||||||||||||
Repayments of Long-term Debt | 304.0 | |||||||||||||||||||||||||||||
Proceeds from Lines of Credit | 79 | |||||||||||||||||||||||||||||
Debt Issuance Cost | 1.2 | |||||||||||||||||||||||||||||
Extinguishment of Debt, Gain (Loss), Net of Tax | $ 0.7 |