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RELATED-PARTY TRANSACTIONS - Sale of Shares to and Purchase of Shares from SECT (Details) - shares	Dec. 28, 2017	Feb. 13, 2017	Dec. 31, 2016
Greater Than 5% Shareholder, Evercore Trust Company
Related Party Transaction [Line Items]
Common stock, shares outstanding (in shares)			2,500,000
Company ownership percentage maximum threshold		5.00%
Common Stock | Variable Interest Entity, Primary Beneficiary
Related Party Transaction [Line Items]
Number of shares repurchased (in shares)	2,500,000

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ 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(29))
-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 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

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