Derivative Instruments (Details) - USD ($)	1 Months Ended	12 Months Ended
Mar. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Indebtedness, gross	$ 838,089,000	$ 840,232,000
Interest Rate Cap [Member]
Derivative [Line Items]
Notional amount	$ 80,000,000
Strike rate	5.78%
Cost of derivative	$ 4,500
Interest Rate Cap [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amount		139,500,000
Cost of derivative		$ 117,000
Interest Rate Cap [Member] \| Not Designated as Hedging Instrument [Member] \| Minimum [Member]
Derivative [Line Items]
Strike rate		2.00%
Interest Rate Cap [Member] \| Not Designated as Hedging Instrument [Member] \| Maximum [Member]
Derivative [Line Items]
Strike rate		4.50%
Interest Rate Floor [Member]
Derivative [Line Items]
Notional amount		$ 3,000,000,000
Floor interest rate		(0.25%)
Cost of derivative		$ 3,500,000
Eurodollar Future [Member]
Derivative [Line Items]
Cost of derivative	124,000	372,000
Derivative commissions	10,000	60,000
Mortgages [Member]
Derivative [Line Items]
Indebtedness, gross		152,000,000
Mortgages [Member] \| Mortgage Loan 1 [Member]
Derivative [Line Items]
Indebtedness, gross	$ 80,000,000	$ 80,000,000

Derivative Commissions

No definition available.

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Namespace Prefix:	ahp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

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Period Type:	instant

- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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

- Definition

Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

+ Details

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- 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

The cash outflow for cost incurred directly with the issuance of a derivative security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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