Guarantees (Details) - USD ($)	6 Months Ended
Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015
Guarantor Obligations [Line Items]
Amounts guaranteed (not to exceed)	$ 206,923,000	$ 210,703,000	$ 236,045,000
Amounts outstanding under guarantee	89,822,000	107,615,000	133,897,000
Fair value of guarantees	$ 4,467,000	7,350,000	4,865,000
Number of years, before expiring guarantees	1 year
Financial Guarantee
Guarantor Obligations [Line Items]
Amounts outstanding under guarantee	$ 0	$ 16,699,000	$ 0

Guarantor Obligations, Fair Value

No definition available.

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Namespace Prefix:	aoi_
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Period Type:	instant

- Definition

Number of Years, Before Expiring Guarantees

+ References

No definition available.

+ Details

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- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

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Balance Type:	credit
Period Type:	instant

- Details

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