Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of the Provision for Income Taxes (Details)

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Income Taxes - Components of the Provision for Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Current:        
Federal   $ 113,491 $ 169,053 $ 126,903
State   38,647 25,644 20,111
Total current income tax expense (benefit)   152,138 194,697 147,014
Deferred:        
Federal   49,125 (81,551) 29,354
State   8,582 (1,088) 5,454
Total deferred income tax expense (benefit)   57,707 (82,639) 34,808
Total provision for income taxes $ 104,900 $ 209,845 $ 112,058 $ 181,822