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v3.3.1.900

Capital Stock (Details) $ / shares in Units, $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2015 USD ($) Vote $ / shares shares | Dec. 31, 2014 USD ($) $ / shares shares | Dec. 31, 2013 USD ($) shares | Oct. 31, 2015 USD ($) | Aug. 31, 2013 USD ($) | Dec. 31, 1998 USD ($)
Capital stock [Abstract] |  |  |  |  |  |
Common stock, authorized (in shares) | 500,000,000 | 500,000,000 |  |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.001 | $ 0.001 |  |  |  |
Weighted average share outstanding [Abstract] |  |  |  |  |  |
Basic weighted-average common shares outstanding (in shares) | 57,997,000 | 59,073,000 | 58,606,000 |  |  |
Effect of dilutive securities: Stock awards and options (in shares) | 1,060,000 | 1,814,000 | 2,842,000 |  |  |
Diluted weighted-average common shares outstanding (in shares) | 59,057,000 | 60,887,000 | 61,448,000 |  |  |
Anti-dilutive securities excluded from calculation of diluted earnings per share (in shares) | 1,800,000 | 2,700,000 | 1,200,000 |  |  |
Repurchases of common stock [Abstract] |  |  |  |  |  |
Common stock repurchased | $ | $ 164,094 | $ 45,724 | $ 140,865 |  |  |
Amount available for repurchases | $ | $ 446,900 |  |  |  |  |
Preferred Stock [Member] |  |  |  |  |  |
Capital stock [Abstract] |  |  |  |  |  |
Preferred stock, authorized (in shares) | 25,000,000 |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares | $ 0.001 |  |  |  |  |
Shares outstanding (in shares) | 0 | 0 |  |  |  |
Common Class A [Member] |  |  |  |  |  |
Capital stock [Abstract] |  |  |  |  |  |
Common stock, authorized (in shares) | 500,000,000 |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.001 |  |  |  |  |
Number of votes per share | Vote | 1 |  |  |  |  |
Number of shares of class A common stock issued after conversion of Class B common stock |  | 1 |  |  |  |
Repurchases of common stock [Abstract] |  |  |  |  |  |
Shares repurchased (in shares) | 3,800,000 | 800,000 | 1,700,000 |  |  |
Common stock repurchased | $ | $ 164,100 | $ 45,724 | $ 140,865 |  |  |
Authorized amount | $ |  |  |  | $ 10,000 |  | $ 500,000
Increase in authorized amount | $ |  |  |  |  | $ 400,000 |
Common Class B [Member] |  |  |  |  |  |
Capital stock [Abstract] |  |  |  |  |  |
Common stock, authorized (in shares) | 100,000,000 |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.001 |  |  |  |  |
Shares outstanding (in shares) | 0 | 0 |  |  |  |
Number of votes per share | Vote | 10 |  |  |  |  |

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