Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Reconciliation between Basic and Diluted Earnings Per Share (Details)

v3.7.0.1
Summary of Significant Accounting Policies - Reconciliation between Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Earnings Per Share [Abstract]    
Net income $ 61,910 $ 73,229
Basic weighted-average shares outstanding (in shares) 227,468,526 227,239,533
Dilutive effect of awards 1,087,426 872,502
Diluted weighted-average shares outstanding (in shares) 228,555,952 228,112,035
Basic earnings per share (in dollars per share) $ 0.27 $ 0.32
Diluted earnings per share (in dollars per share) $ 0.27 $ 0.32