Earnings Per Share - Computation of Basic Earnings Per Share and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Computation of basic and diluted earnings per share | |||||||||||
| Net income | $ 92,491 | $ 63,704 | $ 25,826 | ||||||||
| Shares: | |||||||||||
| Basic weighted average common shares outstanding | 67,616 | 66,295 | 54,931 | ||||||||
| Assumed conversion of dilutive instruments | 5,850 | 4,216 | 4,646 | ||||||||
| Diluted weighted average common shares outstanding | 73,466 | 70,511 | 59,577 | ||||||||
| Earnings per share | |||||||||||
| Basic: | $ 0.56 | $ 0.38 | $ 0.21 | $ 0.22 | $ 0.21 | $ 0.30 | $ 0.27 | $ 0.17 | $ 1.37 | $ 0.96 | $ 0.47 |
| Diluted: | $ 0.51 | $ 0.35 | $ 0.20 | $ 0.20 | $ 0.19 | $ 0.29 | $ 0.26 | $ 0.16 | $ 1.26 | $ 0.90 | $ 0.43 |