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STOCKHOLDERS' EQUITY - Common Stock (Details) - USD ($) $ in Thousands			3 Months Ended
	May 11, 2016	Mar. 08, 2016	Mar. 31, 2017	Mar. 31, 2016
Class of Stock [Line Items]
Net proceeds from issuance of common stock			$ 0	$ 75,531
Common Stock
Class of Stock [Line Items]
Issuance of stock shares	5,250,000	4,850,000
Net proceeds from issuance of common stock	$ 100,000	$ 66,500
Common Stock | Over Allotment Option
Class of Stock [Line Items]
Issuance of stock shares		727,500
Net proceeds from issuance of common stock		$ 10,500
Underwriters option period		30 days

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- Definition

The number of days the underwriters have the option to exercise their overallotment option from the closing date.

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X

- Definition

The cash inflow from the additional capital contribution to the entity.

+ 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

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-Name Accounting Standards Codification
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-Section 45
-Paragraph 14
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X

- Definition

Number of new stock issued during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
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