LEASE COMMITMENTS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating leases future minimum payments [Line Items]
Rent expense	$ 4,178,000	$ 3,111,000	$ 3,415,000
Deferred gain recognized related to sale of California facility		400,000	300,000
Lease payments received from third party	400,000	400,000	200,000
Facility Leases [Member]
Operating leases future minimum payments [Line Items]
2013	3,087,000
2014	2,993,000
2015	2,038,000
2016	1,306,000
2017	1,041,000
Thereafter	412,000
Total minimum lease payments	10,877,000
Equipment Leases [Member]
Operating leases future minimum payments [Line Items]
2013	919,000
2014	826,000
2015	725,000
2016	605,000
2017	411,000
Thereafter	264,000
Total minimum lease payments	$ 3,750,000