Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Narrative (Details)

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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Jan. 31, 2019
Mar. 31, 2019
Mar. 31, 2018
Income Tax Disclosure [Abstract]      
Land sale $ 100.0 $ 103.6 $ 2.8
Current federal income tax liability   21.0  
Current federal income tax expense   $ 21.0