INCOME TAXES - Expected And Reported Income Taxes (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal statutory income tax rate	35.00%	35.00%	35.00%
Computed tax expense (benefit) at federal statutory rates on income (loss) before income taxes (benefit)	$ 16,667	$ 16,357	$ 16,975
State income tax expense (benefit), net of federal benefit	1,333	2,491	3,399
Federal tax expense associated with non-amortizable assets	0	0	0
Non recognition of expense due to full valuation allowance	(244)	0	54
Valuation allowance current year activity	0	0	0
Decrease in valuation allowance for change in federal net operating loss carryback rules	0	0	0
Change in uncertain tax positions	0	0	0
Tax benefit shortfall associated with share-based awards	12	62	997
Nondeductible expenses and other	669	1,001	1,051
Income taxes (benefit)	$ 18,437	$ 19,911	$ 22,476
Effective income tax rate	38.70%	42.60%	46.30%
Impairment loss	$ 0	$ 0	$ 850