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Income Taxes - Reconciliation of income taxes (Details)		12 Months Ended
	Dec. 21, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes
Statutory federal income tax rate	35.00%	21.00%	21.00%	35.00%
Increase (decrease) due to:
State income taxes		5.73%	5.83%	3.41%
Deferred tax adjustment related		0.49%		7.85%
Tax exempt interest and dividend income		(0.35%)	(1.13%)	(0.61%)
Stock-based compensation expense		1.15%	0.01%	0.01%
Other		(0.61%)	(0.28%)	0.38%
Effective tax rate		27.41%	25.43%	46.04%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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