SHAREHOLDERS' EQUITY (Details) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
vote
shares
|
Dec. 31, 2015
USD ($)
shares
|
Dec. 31, 2014
shares
|
May 03, 2016
shares
|
|
| Class of Stock | ||||
| Percentage of the total number of directors the holders of common stock are entitled to elect | 25.00% | |||
| Common Stock Repurchases | ||||
| Trade date fair value of shares acquired during period | $ | $ 315,250 | $ 200,000 | ||
| Common Stock | ||||
| Class of Stock | ||||
| Votes per each share of stock | vote | 1 | |||
| Common stock reserved | 17,900,000 | |||
| Common Stock Repurchases | ||||
| Treasury stock acquired during period (in shares) | 6,300,000 | 3,000,000 | 0 | |
| Trade date fair value of shares acquired during period | $ | $ 315,300 | $ 200,000 | ||
| Number of shares authorized to be repurchased | 10,000,000.0 | |||
| Remaining number of shares authorized to be repurchased | 9,300,000 | |||
| Class B Convertible Common Stock | ||||
| Class of Stock | ||||
| Votes per each share of stock | vote | 10 | |||