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EQUITY STRUCTURE AND ACCOUNTS - Dividends Declared (Details) - $ / shares |  |  | 3 Months Ended | 9 Months Ended
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Jun. 08, 2015 | Mar. 12, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Class A common stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Dividends per common stock (in dollars per share) | $ 0.25 | $ 0.25 | $ 0.275 | $ 0 | $ 0.775 | $ 0

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- Definition Aggregate dividends declared 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 + Details
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