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Accruals and Other Liabilities (Details Textual) (USD $)
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Mar. 31, 2015
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Dec. 31, 2014
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Dec. 31, 2013
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|---|---|---|---|
| Accrued and Other Liabilities [Abstract] | |||
| Accrued Media Cost, Current | $ 214,435,000 | $ 144,161,000 | |
| Other Liabilities | 6,173,000 | 6,419,000 | |
| Accrued and Other Liabilities Attributable To Noncontrolling Interest | $ 5,439,000 | $ 6,014,000 | $ 5,210,000 |