LEASES (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
LEASES
Rent expense	$ 43,000,000	$ 41,400,000	$ 40,400,000
Sublease rental income netted against rent expense	1,300,000	600,000	100,000
Sublease rent income expected to be received over the next four years	2,400,000
Future minimum rental payments, by year and in the aggregate, under operating leases
2013	45,081,000
2014	36,583,000
2015	26,253,000
2016	19,397,000
2017	14,031,000
Thereafter	30,014,000
Total	$ 171,359,000