COMMITMENTS AND CONTINGENCIES (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2013	Jun. 30, 2013	Jun. 30, 2012
future minimum payments due [Line Items]
Operating Leases, Future Minimum Payments Due, Current	$ 3,817,000			$ 3,817,000
Capital Leases, Future Minimum Payments Due, Current	108,000			108,000
future minimum payments due, current	3,925,000			3,925,000
Operating Leases, Future Minimum Payments, Due in Two Years	7,023,000			7,023,000
Capital Leases, Future Minimum Payments Due in Two Years	210,000			210,000
future minimum payments due in two years	7,233,000			7,233,000
Operating Leases, Future Minimum Payments, Due in Three Years	5,934,000			5,934,000
Capital Leases, Future Minimum Payments Due in Three Years	177,000			177,000
future minimum payments due in three years	6,111,000			6,111,000
Operating Leases, Future Minimum Payments, Due in Four Years	4,983,000			4,983,000
Capital Leases, Future Minimum Payments Due in Four Years	23,000			23,000
future minimum payments due in four years	5,006,000			5,006,000
Operating Leases, Future Minimum Payments, Due in Five Years	4,301,000			4,301,000
Capital Leases, Future Minimum Payments Due in Five Years	0			0
future minimum payments due in five years	4,301,000			4,301,000
Operating Leases, Future Minimum Payments, Due Thereafter	5,546,000			5,546,000
Capital Leases, Future Minimum Payments Due Thereafter	0			0
future minimum leases due thereafter	5,546,000			5,546,000
Operating Leases, Future Minimum Payments Due	31,604,000			31,604,000
Capital Leases, Future Minimum Payments Due	518,000			518,000
future minimum payments due	32,122,000			32,122,000
Operating Leases, Rent Expense	1,800,000	1,400,000		3,600,000	2,900,000
Long-term Purchase Commitment, Amount			$ 21,900,000
Minimum [Member]
future minimum payments due [Line Items]
capital lease interest rate	3.00%			3.00%
Maximum [Member]
future minimum payments due [Line Items]
capital lease interest rate	7.00%			7.00%