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DEBT - 2015 Revolving Credit Facility (Details) $ in Thousands						9 Months Ended
	Apr. 07, 2016 USD ($)	Oct. 14, 2015 USD ($)	Jul. 10, 2015 USD ($)	Apr. 08, 2015 USD ($)	Apr. 07, 2015 USD ($) installment	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Line of Credit Facility
Debt classified as current liability							$ 540,455	$ 579,023
Revolving Credit Facility | 2015 Revolving Credit Facility
Line of Credit Facility
Maximum borrowing capacity					$ 59,500
Quarterly reduction of total amount committed					$ 1,641
Number of quarterly installments | installment					20
Commitment fee on unused daily average unutilized commitment (as a percent)					1.50%
Period after agreement date for first periodic payment					3 months
Drawdowns during the period		$ 21,218	$ 10,000	$ 25,000		$ 35,000
Long-term debt							51,294	$ 56,218
Debt classified as current liability							$ 51,294
Amount of amortization postponed from current due date	$ 1,641
Debt service required	$ 3,241
Revolving Credit Facility | 2015 Revolving Credit Facility | LIBOR
Line of Credit Facility
Reference rate for interest payable					LIBOR
Revolving Credit Facility | 2015 Revolving Credit Facility | Minimum | LIBOR
Line of Credit Facility
Applicable margin over reference rate for interest payable					3.40%
Revolving Credit Facility | 2015 Revolving Credit Facility | Maximum | LIBOR
Line of Credit Facility
Applicable margin over reference rate for interest payable					4.25%

X

- Definition

Represents the amount of scheduled amortized payment due that will be postponed from existing due date.

+ References

No definition available.

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- Definition

Amount of debt service coverage.

+ References

No definition available.

+ Details

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X

- Definition

Represents the number of quarterly installments in which the line of credit facility shall be repaid.

+ References

No definition available.

+ Details

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- Definition

Represents the period after loan agreement for the first periodic repayment of the revolving credit facility.

+ References

No definition available.

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- Definition

Represents the quarterly reduction in the line of credit facility.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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- 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.

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- 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

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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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

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-Topic 210
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Name Accounting Standards Codification
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-Section S99
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-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

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- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ 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 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

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-Publisher FASB
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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