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Income Taxes - Schedule of Reconciliation of Statutory Tax Rate to Effective Tax Rate (Parenthetical) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of effective income tax rate      
Federal tax law change     $ 21,453
Statutory tax rate (as a percent) 12.50% 12.50% 12.50%
U.S. federal      
Reconciliation of effective income tax rate      
Federal tax law change     $ 21,500
Statutory tax rate (as a percent)   21.00% 35.00%