CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands |
Jun. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Current Assets: | ||
| Allowance for doubtful accounts on trade accounts receivable - other | $ 17,422 | $ 22,167 |
| Class A common stock | ||
| Current Assets: | ||
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, shares authorized | 1,600,000,000 | 1,600,000,000 |
| Common stock, shares issued | 226,419,469 | 281,866,884 |
| Common stock, shares outstanding | 226,419,469 | 225,748,624 |
| Class B common stock | ||
| Current Assets: | ||
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, shares authorized | 800,000,000 | 800,000,000 |
| Common stock, shares issued | 238,435,208 | 238,435,208 |
| Common stock, shares outstanding | 238,435,208 | 238,435,208 |