Treasury Stock Acquisition (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Schedule of Treasury Stock [Line Items] | |||
Treasury shares at beginning of period | 53,701,096 | 43,802,611 | 43,392,617 |
Other | 31,013 | ||
Treasury shares at end of period | 77,336,387 | 53,701,096 | 43,802,611 |
Treasury shares at beginning of period | $ 1,080,448 | $ 918,711 | $ 911,094 |
Treasury stock acquired, cost | 264,686 | 161,737 | 7,617 |
Other | 372 | ||
Treasury shares at end of period | $ 1,345,134 | $ 1,080,448 | $ 918,711 |
Stock Buyback Program | |||
Schedule of Treasury Stock [Line Items] | |||
Treasury stock acquired, shares | 22,566,331 | 9,331,131 | 5,503 |
Treasury stock acquired, cost | $ 250,109 | $ 150,497 | $ 109 |
Long Term Incentive Plan | |||
Schedule of Treasury Stock [Line Items] | |||
Treasury stock acquired, shares | 1,037,947 | 567,354 | 404,491 |
Treasury stock acquired, cost | $ 14,205 | $ 11,240 | $ 7,508 |