Debt Instrument Accordion Feature

No definition available.

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Namespace Prefix:	ccs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument Exercise Accordion Feature

+ References

No definition available.

+ Details

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Namespace Prefix:	ccs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Mortgage Repurchase Facility

+ References

No definition available.

+ Details

Name:	ccs_MortgageRepurchaseFacility
Namespace Prefix:	ccs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Uncommitted Option To Increase Credit Facility

+ References

No definition available.

+ Details

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

- Definition

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

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Total interest costs incurred during the period and either capitalized or charged against earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Period Type:	instant

- 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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- Details

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Debt (Narrative) (Details) - USD ($)		3 Months Ended		9 Months Ended
Debt (Narrative) (Details) - USD ($)	Jun. 05, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jun. 28, 2018	May 04, 2018	May 03, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Line of credit facility, outstanding amount		$ 236,000,000		$ 236,000,000
Mortgage repurchase facilities		57,327,000		57,327,000					$ 48,319,000
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Texas Capital Bank [Member]
Debt Instrument [Line Items]
Maturity date	Apr. 30, 2022
Line of credit facility. maximum borrowing capacity	$ 540,000,000	354,000,000		354,000,000
Line of credit facility, outstanding amount		236,000,000		236,000,000
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Maximum [Member] \| Texas Capital Bank [Member]
Debt Instrument [Line Items]
Uncommitted option to increase credit facility	$ 100,000,000
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Eurodollar Rate [Member] \| Maximum [Member] \| Texas Capital Bank [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	3.10%
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Eurodollar Rate [Member] \| Minimum [Member] \| Texas Capital Bank [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.60%
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Base Rate [Member] \| Maximum [Member] \| Texas Capital Bank [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.10%
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Base Rate [Member] \| Minimum [Member] \| Texas Capital Bank [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.60%
Revolving Credit Facility [Member] \| Joinder Agreement [Member]
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity						$ 590,000,000
Accordion feature, exercising						50,000,000
Accordion feature						$ 100,000,000
Revolving Mortgage Loan Repurchase Facility [Member] \| Master Repurchase Agreement [Member] \| Comerica Bank [Member] \| Financial Services [Member]
Debt Instrument [Line Items]
Incurred interest expense		400,000	$ 100,000	800,000	$ 100,000
Revolving Mortgage Loan Repurchase Facility [Member] \| Second Master Repurchase Agreement [Member] \| Maximum [Member] \| Inspire [Member] \| Comerica Bank [Member]
Debt Instrument [Line Items]
Principal amount								$ 35,000,000
Revolving Mortgage Loan Repurchase Facility [Member] \| Third Master Repurchase Agreement [Member] \| Maximum [Member] \| Inspire [Member] \| Comerica Bank [Member]
Debt Instrument [Line Items]
Principal amount							$ 40,000,000
Revolving Mortgage Loan Repurchase Facility [Member] \| Second Master Repurchase Agreement And Third Master Repurchase Agreement [Member] \| Inspire [Member] \| Comerica Bank [Member]
Debt Instrument [Line Items]
Mortgage repurchase facilities		$ 57,300,000		$ 57,300,000
Revolving Mortgage Loan Repurchase Facility [Member] \| Second Master Repurchase Agreement And Third Master Repurchase Agreement [Member] \| Maximum [Member] \| Inspire [Member] \| Comerica Bank [Member]
Debt Instrument [Line Items]
Principal amount							$ 75,000,000