The interest rate at which the debt instrument is effectively fixed by a cash flow hedge.

No definition available.

Name:	chsp_DebtInstrumentEffectivelyFixedRate
Namespace Prefix:	chsp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of years for which the debt instrument interest rate is effectively fixed by a cash flow hedge.

+ References

No definition available.

+ Details

Name:	chsp_DebtInstrumentEffectivelyFixedTerm
Namespace Prefix:	chsp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of each debt maturity extension option.

+ References

No definition available.

+ Details

Name:	chsp_DebtInstrumentMaturityExtensionPeriod
Namespace Prefix:	chsp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the derivative becomes effective.

+ References

No definition available.

+ Details

Name:	chsp_DerivativeEffectiveDate
Namespace Prefix:	chsp_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Potential future maximum borrowing capacity under the line of credit facility.

+ References

No definition available.

+ Details

Name:	chsp_LineOfCreditFacilityPotentialMaximumBorrowingCapacity
Namespace Prefix:	chsp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of borrowing base hotels supporting the revolving credit facility, as of the period end.

+ References

No definition available.

+ Details

Name:	chsp_LineofCreditFacilityBorrowingBaseHotels
Namespace Prefix:	chsp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Month and year when the line of credit facility terminates.

+ References

No definition available.

+ Details

Name:	chsp_LineofCreditFacilityExpirationDateMonthYear
Namespace Prefix:	chsp_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

Potential future maximum borrowing capacity under the unsecured term loan.

+ References

No definition available.

+ Details

Name:	chsp_UnsecuredTermLoanPotentialMaximumBorrowingCapacity
Namespace Prefix:	chsp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeMaturityDates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Fixed interest rate that will be received or paid upon exercise of the interest rate swaption contract.

+ References

No definition available.

+ Details

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

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

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

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
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Long-Term Debt Details Textual (Details) $ in Thousands			6 Months Ended
Long-Term Debt Details Textual (Details) $ in Thousands	May 31, 2018 USD ($)	Apr. 21, 2017 USD ($)	Jun. 30, 2019 USD ($) hotel	Dec. 31, 2018 USD ($)
Long-Term Debt
Number of borrowing base hotels supporting revolving credit facility \| hotel			11
Current borrowing capacity under revolving credit facility			$ 300,000
Weighted-average interest rate on long-term debt			3.90%
Revolving Credit Facility [Member]
Long-Term Debt
Revolving credit facility, maturity date month year	May 2022		May 2022
Potential maximum borrowing capacity under revolving credit facility	$ 450,000
Debt instrument maturity extension period	1 year
Unsecured Term Loan [Member]
Long-Term Debt
Debt instrument effectively fixed term		5 years
Debt instrument, term		5 years
Unsecured term loan potential maximum borrowing capacity		$ 375,000
Unsecured term loan			$ 225,000	$ 225,000
Debt instrument effectively fixed rate			3.31%
Interest Rate Swap [Member]
Long-Term Debt
Fixed interest rate on interest rate swap		1.86%
Derivative, notional amount		$ 225,000
Derivative, effective date		Apr. 21, 2017
Derivative, maturity date		Apr. 21, 2022
Minimum [Member] \| Revolving Credit Facility [Member]
Long-Term Debt
Rate spread over LIBOR	1.45%
Minimum [Member] \| Unsecured Term Loan [Member]
Long-Term Debt
Rate spread over LIBOR		1.45%
Maximum [Member] \| Revolving Credit Facility [Member]
Long-Term Debt
Rate spread over LIBOR	2.20%
Maximum [Member] \| Unsecured Term Loan [Member]
Long-Term Debt
Rate spread over LIBOR		2.20%