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

No definition available.

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

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ 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)(1))
-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 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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

- Definition

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

+ References

+ Details

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

- Definition

Fair value of the amount outstanding under the credit facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611

+ Details

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

- Details

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Namespace Prefix:
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- Details

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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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Period Type:

Debt - Related Party (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Debt - Related Party (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Nov. 30, 2016
Term Loan Facility
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	$ 200,000		$ 200,000
Term Loan Facility \| OCI Beaumont LLC
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	$ 200,000	$ 200,000
Debt interest rate, stated percentage	6.75%	6.75%
Debt interest rate, applicable margin	0.25%
Interest rate at period end	8.31%	8.28%
Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate at period end	5.99%
Revolving Credit Facility \| OCI Beaumont LLC
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	$ 0	$ 35,000
Debt interest rate, stated percentage	4.75%	3.50%
Debt interest rate, applicable margin	0.25%
Interest rate at period end	6.24%	4.63%
LIBOR \| Term Loan Facility \| OCI Beaumont LLC
Debt Instrument [Line Items]
Debt interest rate, applicable margin	0.25%	0.25%
LIBOR \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt interest rate, applicable margin	4.75%
LIBOR \| Revolving Credit Facility \| OCI Beaumont LLC
Debt Instrument [Line Items]
Debt interest rate, applicable margin	0.25%	0.25%