UNAUDITED CONSOLIDATED STATEMENT OF STOCKHOLDERS' DEFICIENCY (Parenthetical) - Treasury Stock [Member] - Class A Common Stock [Member] $ in Millions	3 Months Ended
Mar. 31, 2016 USD ($) $ / shares shares
Shares withheld for withholding taxes (in shares) \| shares	73,992
Shares withheld for withholding taxes, weighted average price per share (in dollars per share) \| $ / shares	$ 35.00
Shares withheld for withholding taxes \| $	$ 2.6

Total cost of shares repurchased divided by the total number of shares repurchased.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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