COMMITMENTS AND CONTINGENCIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 Facility	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2001
Finance Obligation [Abstract]
Year Ending December 31, 2014	$ 1,546,000
Year Ending December 31, 2015	1,546,000
Year Ending December 31, 2016	1,546,000
Year Ending December 31, 2017	0
Year Ending December 31, 2018	0
Thereafter	0
Finance Obligation, Total	4,638,000
Less amount representing interest	(4,638,000)
Finance obligation net of interest	0
Operating Leases [Abstract]
Year Ending December 31, 2013	21,223,000
Year Ending December 31, 2014	19,429,000
Year Ending December 31, 2015	15,680,000
Year Ending December 31, 2016	14,628,000
Year Ending December 31, 2017	13,644,000
Thereafter	34,913,000
Operating Leases, Total	119,517,000
Less amount representing interest	0
Operating leases net of interest	119,517,000
Capital Leases [Abstract]
Year Ending December 31, 2013	2,494,000
Year Ending December 31, 2014	2,494,000
Year Ending December 31, 2015	2,556,000
Year Ending December 31, 2016	2,678,000
Year Ending December 31, 2017	2,678,000
Thereafter	37,137,000
Capital Leases, Total	50,037,000
Less amount representing interest	(24,094,000)
Capital leases net of interest	25,943,000
Number of owned facilities	4
Net proceeds from sale and leaseback transaction	8,800,000
Lease Term	15 years
Period considered for lease extension	10 years
Lease rent expense	21,900,000	21,900,000	21,900,000	1,200,000
Interest expense related to financing obligations	1,500,000	1,500,000	1,500,000
Outstanding net loan commitment	26,500,000
Future employment contract commitments	8,900,000
Surety bonds	$ 16,900,000