INCOME TAXES INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense at statutory federal rate									$ 15,789	$ 20,537	$ 35,388
State income taxes, net of federal effect									2,883	4,308	3,834
Nondeductible professional fees									1,255	1,776	0
Other permanent differences including lobbying expense									424	236	687
Share-based compensation									(261)	(718)	5,167
Deferred tax adjustment									0	0	(552)
Deferred tax impact of TCJA									0	117	(6,523)
Return to provision adjustments									(245)	89	0
Change in uncertain tax positions									205	14	860
Total provision for income taxes	$ 4,430	$ 3,802	$ 6,145	$ 5,673	$ 5,846	$ 7,913	$ 6,056	$ 6,544	$ 20,050	$ 26,359	$ 38,861
Effective income tax rate on continuing operations									26.70%	27.00%	38.40%