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SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended
		Aug. 31, 2016	Sep. 26, 2016	Jun. 30, 2016	Dec. 31, 2015
Subsequent Event [Line Items]
Outstanding amount	[1]			$ 380,213	$ 324,568
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividend paid (in dollars per share)		$ 0.25
Outstanding amount			$ 447,000
Subsequent Event [Member] | Gulf Navigation Holding PSJ [Member]
Subsequent Event [Line Items]
Settlement amount			$ 5,300
[1] Long-term Debt consists of outstanding amounts on our Credit Facility less unamortized deferred financing cost. Outstanding amounts on our Credit Facility were 385,000 and 330,000 as of June 30, 2016 and December 31, 2015, respectively. Please see note 2 to these Condensed Consolidated Financial Statements describing the effects of the accounting principle change covering the deferred financing costs.

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- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts 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 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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