Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheets) (Additional Information) (Detail) - USD ($) $ / shares in Units, $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
Oct. 16, 2013 |
May. 13, 2011 |
|---|---|---|---|---|
| Allowance for doubtful accounts | $ 4,923 | $ 6,004 | ||
| Treasury stock, shares | 22,445,945 | 22,619,554 | ||
| Class A Common Stock | ||||
| Common stock, par value | $ 0.01 | $ 0.01 | ||
| Common stock, shares authorized | 750,000,000 | 750,000,000 | ||
| Common stock, shares issued | 255,902,892 | 254,997,925 | 18,860,000 | |
| Common stock, shares outstanding | 233,456,945 | 232,378,371 | ||
| Class C Common Stock | ||||
| Common stock, par value | $ 0.01 | $ 0.01 | ||
| Common stock, shares authorized | 644,871 | 644,871 | ||
| Common stock, shares issued | 644,871 | 644,871 | ||
| Common stock, shares outstanding | 644,871 | 644,871 | ||
| 7.75% senior notes | ||||
| Interest rate percentage on borrowings, per annum | 7.75% | 7.75% | 7.75% |