v3.8.0.1

Commitments and Contingencies - Commitments for Capital Additions (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jul. 05, 2016 lawsuit
HCP, Inc.
Commitments
Number of lawsuits \| lawsuit			2
HCR ManorCare, Inc. \| HCRMC Master Lease Capital Addition Financing
Commitments
Rate of increase (as a percent)	7.75%
Amount funded	$ 2,800
Amount funded during certain period	0	$ 0
HCR ManorCare, Inc. \| HCRMC Master Lease Capital Addition Financing \| Maximum
Commitments
Aggregate obligation to fund	100,000
Obligation in any single lease year	$ 50,000
HCR ManorCare, Inc. \| HCRMC Master Lease Capital Addition Financing \| 10 year Treasury Rate
Commitments
Margin added to variable rate (as a percent)	5.00%

Reflects a contractual agreement under a lessor leasing arrangement to fund a lessee.

+ References

No definition available.

+ Details

Name:	qcp_LessorLeasingArrangementCommitmentToFund
Namespace Prefix:	qcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount funded in a contractual agreement between a lessor and lessee.

+ References

No definition available.

+ Details

Name:	qcp_LessorLeasingArrangementsCommitmentToLendAmountFunded
Namespace Prefix:	qcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount funded in a contractual agreement between a lessor and lessee during certain period.

+ References

No definition available.

+ Details

Name:	qcp_LessorLeasingArrangementsCommitmentToLendAmountFundedDuringCertainPeriod
Namespace Prefix:	qcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Reflects a single lease year of a contractual agreement under a lessor leasing arrangement to lend funds to a lessee.

+ References

No definition available.

+ Details

Name:	qcp_LessorLeasingArrangementsCommitmentToLendSingleLeaseYear
Namespace Prefix:	qcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

Name:	qcp_LessorLeasingArrangementsDescriptionLineItems
Namespace Prefix:	qcp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Refers to the number of lawsuits.

+ References

No definition available.

+ Details

Name:	qcp_NumberOfLawsuits
Namespace Prefix:	qcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin.

+ References

No definition available.

+ Details

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

- Definition

Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

Name:	us-gaap_CounterpartyNameAxis=qcp_HealthCareAndRetirementManorcareIncorporatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=qcp_HcrManorcareIncorporatedMasterLeaseCapitalAdditionFinancingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=qcp_TenYearUnitedStatesTreasuryRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

QUALITY CARE PROPERTIES, INC. 10-Q