COMMITMENTS AND CONTINGENCIES (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
future minimum payments due [Line Items]
Operating Leases, 2014 (nine months)	$ 6,807,000
Capital Leases, 2014 (nine months)	355,000
Total, 2014	7,162,000
Operating Leases, 2015	7,798,000
Capital Leases, 2015	398,000
Total, 2015	8,196,000
Operating Leases, 2016	6,215,000
Capital Leases, 2016	102,000
Total, 2016	6,317,000
Operating Leases, 2017	5,209,000
Capital Leases, 2017	43,000
Total, 2017	5,252,000
Operating Leases, 2018	3,594,000
Capital Leases, 2018	5,000
Total, 2018	3,599,000
Operating Leases, 2019 and thereafter	3,490,000
Capital Leases, 2019 and thereafter	0
Total, 2019 and thereafter	3,490,000
Operating Leases, Total	33,113,000
Capital Leases, Total	903,000
Total	34,016,000
Operating Leases, Rent Expense	2,000,000	1,800,000
Long-term Purchase Commitment, Amount	$ 26,500,000
Minimum
future minimum payments due [Line Items]
capital lease interest rate	3.00%
Maximum
future minimum payments due [Line Items]
capital lease interest rate	7.00%