Accrued and Other Liabilities - Textual (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accrued Liabilities and Other Liabilities [Abstract]
Accrued media cost, current	$ 187,540	$ 168,508
Trust Liability, Current	5,122	6,419
Accrued and Other Liabilities Attributable To Noncontrolling Interest	$ 5,473	$ 6,014	$ 5,210	$ 3,624