Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Significant Accounting Policies [Line Items]

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Summary of Significant Accounting Principles - Additional Information (Detail) - USD ($) $ in Millions	Mar. 06, 2012	Sep. 30, 2015	Sep. 30, 2014	Jul. 31, 2014
Bourn & Koch, Inc.
Significant Accounting Policies [Line Items]
Ownership of interest held by noncontrolling partners		20.00%	20.00%
Kentucky Trailer
Significant Accounting Policies [Line Items]
Ownership of interest held by noncontrolling partners		20.00%	20.00%
ORX
Significant Accounting Policies [Line Items]
Ownership interest percentage		40.00%
Jazwares, LLC
Significant Accounting Policies [Line Items]
Ownership interest percentage		30.00%
Acquisition price				$ 60.3
TransRe
Significant Accounting Policies [Line Items]
Business acquisition date	Mar. 06, 2012