Related Party Transaction, Management Services Fee, Maximum Fee

No definition available.

Name:	avhi_RelatedPartyTransactionManagementServicesFeeMaximumFee
Namespace Prefix:	avhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Related Party Transaction, Monitoring Services Fee

+ References

No definition available.

+ Details

Name:	avhi_RelatedPartyTransactionMonitoringServicesFee
Namespace Prefix:	avhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Related Party Transactions, Minimum Required, Ownership Percentage

+ References

No definition available.

+ Details

Name:	avhi_RelatedPartyTransactionsMinimumRequiredOwnershipPercentage
Namespace Prefix:	avhi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	us-gaap_ClassOfStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_AffiliatedEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=avhi_ManagementServicesAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of Significant Accounting Policies - TPG Investment in Company (Details) - TPG Management - USD ($) $ in Millions		12 Months Ended
	Jun. 19, 2013	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
TPG Investment in Company
Ownership percentage (percent)		43.70%
Management Services Agreement
TPG Investment in Company
Monitoring fee (up to)	$ 0.5
TPG ownership percentage (at least)	30.00%
Payments for Fees		$ 0.4	$ 0.4	$ 0.4