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Earnings Per Share - Reconciliation (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Reconciliation of net income before minority interest to net income available for common stockholders    
Income before income taxes and non-controlling interest $ 468,536 $ 23,882
Provision for income taxes 58,514 2,808
Net income 410,022 21,074
Noncontrolling interest (235,271) (16,494)
Net income available for common stockholders $ 174,751 $ 4,580