Summary of Significant Accounting Policies - Schedule of Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Other Liabilities [Abstract]
Income tax liabilities	$ 2,154us-gaap_AccruedIncomeTaxes	$ 5,576us-gaap_AccruedIncomeTaxes
Accrued warranty expenses	27,227us-gaap_StandardProductWarrantyAccrual	16,084us-gaap_StandardProductWarrantyAccrual	11,911us-gaap_StandardProductWarrantyAccrual	11,663us-gaap_StandardProductWarrantyAccrual
Accrued interest	20,187	34,645
Accrued and deferred compensation	10,477	24,270
Customer deposits	14,868us-gaap_CustomerAdvancesAndDeposits	11,977us-gaap_CustomerAdvancesAndDeposits
Other	52,629	49,964
Total	$ 127,542us-gaap_OtherLiabilities	$ 142,516us-gaap_OtherLiabilities

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes.

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Refundable consideration, usually cash, held by the entity pending satisfactory completion of the entity's obligations or pending the closing of a contract.

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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Amount of interest payable on debt, including, but not limited to, trade payables.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy.

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The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet.

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Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

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