Quarterly report pursuant to Section 13 or 15(d)

Net Income Per Share - Calculation of net income per share (Details)

v3.20.1
Net Income Per Share - Calculation of net income per share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Numerator (both basic and diluted)            
Net income relevant to common stockholders $ 36,133 $ 69,805 $ 39,091 $ 36,708 $ 105,938 $ 75,799
Denominator            
Denominator for basic earnings (loss) per share (in shares) 100,425   83,447   100,329 83,265
Denominator for diluted income (loss) per share (in shares) 104,379   86,878   104,181 87,124
Basic income (loss) per common share (in dollars per share) $ 0.36   $ 0.47   $ 1.06 $ 0.91
Diluted income (loss) per common share (in dollars per share) $ 0.35   $ 0.45   $ 1.02 $ 0.87
Stock options            
Denominator            
Dilutive effect of share based payment (in shares) 3,294   3,124   3,252 3,379
Performance stock units            
Denominator            
Dilutive effect of share based payment (in shares) 449   172   418 169
Restricted stock            
Denominator            
Dilutive effect of share based payment (in shares) 211   135   182 311