COMMITMENTS AND CONTINGENCIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Future minimum lease payments for all operating leases
2013	$ 9,452,000
2014	9,899,000
2015	8,320,000
2016	1,630,000
2017	183,000
Total	29,484,000
Operating leases
Rental expense for operating leases	8,500,000	8,900,000	8,000,000
Estimated sublease income expected to be received over next five years	117,000
Estimated sublease income anticipated to be received in next 12 months	117,000
Term of the naming rights agreement		6 years
Minimum future payments under naming rights agreement
2013	1,273,000
2014	1,311,000
2015	1,351,000
2016	1,391,000
Total	$ 5,326,000