QUARTERLY DATA (UNAUDITED) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
QUARTERLY DATA (UNAUDITED)
Revenues	$ 120,180	$ 150,532	$ 122,265	$ 111,120	$ 106,541	$ 118,601	$ 113,315	$ 100,724	$ 504,097	$ 439,177	$ 434,697
Less promotional allowances	(3,904)	(3,876)	(3,148)	(3,170)	(2,951)	(2,962)	(2,796)	(2,386)	(14,098)	(11,095)	(9,806)
Net revenues	116,276	146,656	119,117	107,950	103,590	115,639	110,519	98,338	489,999	428,082	424,891
Operating expenses	102,926	123,389	104,158	93,571	92,012	105,137	94,185	89,180	424,044	380,510	377,132
Operating income	13,350	23,267	14,959	14,379	11,578	10,502	16,334	9,158	65,955	47,572	47,759
(Loss) income from continuing operations	(5,492)	5,336	(2,100)	(3,191)	(6,765)	(41,517)	2,262	(5,133)	(5,447)	(51,153)	(4,963)
Net (loss) income	$ (5,491)	$ 5,313	$ (2,355)	$ (3,191)	$ (5,977)	$ (41,517)	$ 2,262	$ (5,133)	$ (5,724)	$ (50,365)	$ (5,116)
Basic net (loss) income per common share:
Loss from continuing operations (in dollars per share)	$ (0.20)	$ 0.19	$ (0.08)	$ (0.11)	$ (0.24)	$ (1.49)	$ 0.08	$ (0.19)	$ (0.19)	$ (1.84)	$ (0.18)
Net (loss) income (in dollars per share)	$ (0.20)	$ 0.19	$ (0.09)	$ (0.11)	$ (0.21)	$ (1.49)	$ 0.08	$ (0.19)	$ (0.20)	$ (1.81)	$ (0.19)
Diluted net (loss) income per common share:
(Loss) income from continuing operations (in dollars per share)	$ (0.20)	$ 0.19	$ (0.08)	$ (0.11)	$ (0.24)	$ (1.49)	$ 0.08	$ (0.19)	$ (0.19)	$ (1.84)	$ (0.18)
Net (loss) income (in dollars per share)	$ (0.20)	$ 0.19	$ (0.09)	$ (0.11)	$ (0.21)	$ (1.49)	$ 0.08	$ (0.19)	$ (0.20)	$ (1.81)	$ (0.19)
Weighted average shares outstanding-basic	28,054,429	28,047,046	27,984,595	27,960,030	27,940,702	27,880,204	27,800,392	27,717,041	28,011,513	27,835,649	27,549,546
Weighted average shares outstanding-diluted	28,054,429	28,416,008	27,984,595	27,960,030	27,940,702	27,880,204	27,869,684	27,717,041	28,011,513	27,835,649	27,549,546