COMMITMENTS AND CONTINGENCIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Future minimum rental commitments for non-cancelable leases [Abstract]
2013	$ 17,904,000
2014	14,971,000
2015	10,956,000
2016	8,103,000
2017	5,029,000
Thereafter	8,721,000
Rental expense for operating leases	$ 19,900,000	$ 14,200,000	$ 12,500,000