Income Taxes - Schedule of Effective income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal statutory rates	21.00%	21.00%	35.00%
Federal income tax at statutory rates	$ (1,160)	$ 4,812	$ 19,281
Revaluation of net deferred tax liabilities due to U.S. tax reform	0	(286)	(19,304)
U.S. tax reform impact on equity income of investees	0	0	(1,646)
Change in valuation allowance	10	36	177
Change in uncertain tax positions	181	108	7
State income taxes, net of federal benefit	721	1,843	3,157
Non-taxable income	(93)	0	0
Compensation expense	606	235	0
Stock-based compensation	(101)	76	3,400
Meals and entertainment	81	74	99
Transaction costs	0	263	159
Gain on remeasurement of cost method investment	0	(1,381)	0
Tax credits	(858)	(1,208)	(354)
Legal expense	0	0	(805)
Other	40	112	(168)
Total (benefit) provision for income taxes	$ (573)	$ 4,684	$ 4,003
Effective income tax rate	10.40%	20.40%	7.30%