Income Taxes - Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes
Expected tax expense at statutory rates in taxable jurisdictions	$ 12,103	$ 13,896	$ 11,384
Tax-exempt interest		(46)	(42)
State taxes	(629)	(10,746)	3,302
Valuation allowance	642	10,451	(2,819)
Effect of provision to tax return filing adjustments	42		671
Effect of Tax Reform			25,108
Other	(21)	(166)	629
Total income tax expense	$ 12,137	$ 13,389	$ 38,233