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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Allowance for Doubtful Accounts Receivable, Current $ 1,400 $ 1,250
Preferred Stock, Par or Stated Value Per Share $ 0.0001 $ 0.0001
Preferred Stock, Shares Authorized 5,000,000 5,000,000
Preferred Stock, Shares Issued 0 0
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common Stock, Shares Authorized 500,000,000.0  
Treasury Stock, Shares 1,545,000 0
Common Class A [Member]    
Common Stock, Shares Authorized 500,000,000 500,000,000
Common Stock, Shares, Issued 100,596,000 52,091,000
Common stock, shares, outstanding 100,596,000 52,091,000
Common Class B [Member]    
Common Stock, Shares Authorized 150,000,000 150,000,000
Common Stock, Shares, Issued 36,005,000 77,023,000
Common stock, shares, outstanding 36,005,000 77,023,000