Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share - Schedule of Earnings Per Share (Details)

v3.8.0.1
Earnings per Share - Schedule of Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Numerator:        
Net income available to common stockholders for basic and diluted net income per common share $ 275,722 $ 193,901 $ 684,904 $ 541,306
Denominator:        
Weighted average common shares outstanding for basic net income per common share (in shares) 4,618,368 4,870,281 4,660,041 4,957,820
Weighted average impact of dilutive equity instruments (in shares) 86,203 49,548 74,800 47,313
Weighted average shares for diluted net income per common share (in shares) 4,704,571 4,919,829 4,734,841 5,005,133
Net income per common share:        
Basic (in dollars per share) $ 0.06 $ 0.04 $ 0.15 $ 0.11
Diluted (in dollars per share) $ 0.06 $ 0.04 $ 0.14 $ 0.11