Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 740
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65880886&loc=d3e23524-113945

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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New Accounting Pronouncements - Additional Information (Detail) - USD ($)		3 Months Ended	6 Months Ended
	Oct. 01, 2015	Mar. 31, 2016	Mar. 31, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Increase in deferred tax assets and retained earnings			$ 5,197,000
New Accounting Pronouncement, Early Adoption, Effect [Member] \| Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Increase in deferred tax assets and retained earnings	$ 5,200,000
Additional income tax expense			$ 134,000
Additional income tax benefit		$ 67,000