TAXES (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
TAXES.
Effective tax rate (as a percent)	32.82%	37.19%	36.16%
Colorado ballot initiative costs	$ 1,864
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	6,935	9,856	5,029
State	46	396	259
Current tax provision	6,981	10,252	5,288
Federal	637	(108)	(209)
State	(688)	490	(31)
Deferred Income Tax (benefit) provision	(51)	382	(240)
Total tax provision	6,930	10,634	5,048
Income tax provision differs from that computed at the federal statutory rate
Federal tax at the statutory rate (as a percent)	35.00%	35.00%	35.00%
State tax (net of federal benefits) (as a percent)	(1.84%)	1.33%	0.98%
Permanent items	3.49%	0.45%	3.03%
Tax credits	(1.03%)	(0.77%)	(1.44%)
Other (as a percent)	(2.80%)	1.18%	(1.41%)
Provision for income taxes as a percentage of pre-tax earnings	32.82%	37.19%	36.16%
Increase in capital from tax benefits for the employee stock-based compensation	386	413
DEFERRED TAX ASSETS
Stock-based compensation	2,156	4,621
Compensation and benefits	744	760
Bad debt reserves	114	134
Accrued expenses	1,663	1,127
Fixed assets and depreciation	1,615
Base stock	1
NOLs & credit carry-forwards	4,322	4,103
Deferred income tax asset	10,615	10,745
DEFERRED TAX LIABILITIES
Fixed assets and depreciation		(105)
Intangibles and amortization	(2,649)	(3,070)
Prepaid expenses	(984)	(907)
Real estate taxes	(290)	(285)
Other Reserves	(24)
Federal deduction on deferred state taxes	(360)	(119)
Deferred Tax Liabilities, Gross, Total	(4,307)	(4,486)
Deferred Tax Assets, Net, Total	$ 6,308	$ 6,259