Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Allowances for receivables	$ 32,560	$ 32,396
Common Class A [Member]
Class of Stock [Line Items]
Common stock par value per share	$ 0.001	$ 0.001
Common stock shares authorized	500,000,000	500,000,000
Common stock shares issued	500,000,000	500,000,000