Income Taxes - Schedule of Differences Between Federal Tax Rate and Company's Effective Tax Rate for Results of Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Abstract]
U.S. tax at statutory rate	$ 9,710	$ 9,900	$ 11,351
Tax legislation adjustment	0	(4,325)	0
State income taxes, net of federal benefit and tax reform	1,722	1,060	945
Excess equity compensation deduction	(806)	(1,139)	(911)
Non-deductible expenses	743	560	495
Other	0	(24)	0
Total income tax provision	$ 11,369	$ 6,032	$ 11,880
U.S. tax at statutory rate	21.00%	35.00%	35.00%
Tax legislation adjustment	0.00%	(15.30%)	0.00%
State income taxes, net of federal benefit and tax reform	3.70%	3.70%	2.90%
Excess equity compensation deduction	(1.70%)	(4.00%)	(2.80%)
Nondeductible expenses	1.60%	2.00%	1.50%
Other	0.00%	(0.10%)	0.00%
Total	24.60%	21.30%	36.60%