DEBT - Private Placement of Convertible Notes Narrative (Details) - Convertible Senior Notes [Member]	6 Months Ended
Jun. 30, 2016 instrument d $ / shares
Debt Instrument [Line Items]
Common stock, par value (in usd per share)	$ 0.0001
Debt conversion price (in usd per share)	$ 7.10
Debt instrument, convertible, number of equity instruments \| instrument	3,521,126
Debt Instrument, convertible, threshold period following issuance date (in years)	3 years
Debt instrument, convertible, threshold percentage of stock price trigger	125.00%
Debt instrument, convertible, threshold trading days \| d	20
Debt instrument, convertible, threshold consecutive trading days	30 days
Interest rate (percent)	8.00%
Debt instrument, interest, percent paid in kind, maximum	4.00%
Convertible debt redeemed after permissible date, redemption premium, percent of principal	15.00%
Convertible debt redeemed before permissible date, redemption premium, percent of principal	115.00%
Treasury Rate [Member]
Debt Instrument [Line Items]
Convertible debt, basis spread on discount rate on redemption, percentage	0.50%

Convertible Debt, Basis Spread on Discount Rate on Redemption, Percentage

No definition available.

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Namespace Prefix:	ccrn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Convertible Debt Redeemed after Permissible Date, Redemption Premium, Percent of Principal

+ References

No definition available.

+ Details

Name:	ccrn_ConvertibleDebtRedeemedAfterPermissibleDateRedemptionPremiumPercentofPrincipal
Namespace Prefix:	ccrn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Convertible Debt Redeemed Before Permissible Date, Redemption Premium, Percent of Principal

+ References

No definition available.

+ Details

Name:	ccrn_ConvertibleDebtRedeemedBeforePermissibleDateRedemptionPremiumPercentofPrincipal
Namespace Prefix:	ccrn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Convertible,Threshold Period Following Issuance Date

+ References

No definition available.

+ Details

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Namespace Prefix:	ccrn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Interest, Percent Paid in Kind, Maximum

+ References

No definition available.

+ Details

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Namespace Prefix:	ccrn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face amount or stated value per share of common stock.

+ References

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

+ Details

Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.

+ 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(a)(5))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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

- Definition

Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

+ References

No definition available.

+ Details

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

- Definition

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_VariableRateAxis=ccrn_TreasuryRateMember
Namespace Prefix:
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