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Earnings Per Share - Calculation of EPS (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Numerator: |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  |  |  |  |  |  |  |  | $ 85,630 | $ 163,377 | $ 23,828
Income from discontinued operations, net of income taxes |  |  |  |  |  |  |  |  | 0 | 0 | 25,237
Net income | $ 25,703 | $ 24,464 | $ 24,822 | $ 10,641 | $ 63,616 | $ 43,808 | $ 51,916 | $ 4,037 | $ 85,630 | $ 163,377 | $ 49,065
Denominator: |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of common shares outstanding—basic |  |  |  |  |  |  |  |  | 200,796,678 | 195,943,813 | 195,478,353
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Unvested restricted common stock |  |  |  |  |  |  |  |  | 129,640 | 181,310 | 177,314
Shares related to unvested PSUs and MSUs |  |  |  |  |  |  |  |  | 533,092 | 556,763 | 206,839
Unexercised stock appreciation rights |  |  |  |  |  |  |  |  | 524 | 1,095 | 0
Weighted-average number of common shares outstanding—diluted |  |  |  |  |  |  |  |  | 201,459,934 | 196,682,981 | 195,862,506
Basic earnings per share: |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) |  |  |  |  |  |  |  |  | $ 0.43 | $ 0.83 | $ 0.12
Discontinued operations (in dollars per share) |  |  |  |  |  |  |  |  | 0.00 | 0.00 | 0.13
Total (in dollars per share) | $ 0.14 | $ 0.12 | $ 0.12 | $ 0.05 | $ 0.32 | $ 0.22 | $ 0.27 | $ 0.02 | 0.43 | 0.83 | 0.25
Diluted earnings earnings per share: |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) |  |  |  |  |  |  |  |  | 0.43 | 0.83 | 0.12
Discontinued operations (in dollars per share) |  |  |  |  |  |  |  |  | 0.00 | 0.00 | 0.13
Total (in dollars per share) | $ 0.14 | $ 0.12 | $ 0.12 | $ 0.05 | $ 0.32 | $ 0.22 | $ 0.26 | $ 0.02 | $ 0.43 | $ 0.83 | $ 0.25
Stock Appreciation Rights (SARs) |  |  |  |  |  |  |  |  |  |  |
Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share, amount |  |  |  |  |  |  |  |  |  |  | 262,461

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