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LEASES (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Leases [Abstract]      
Unamortized portion of cash abatements $ 8,100,000 $ 4,800,000  
Rent expense 18,800,000 15,900,000 16,000,000
Future minimum rental payments required under operating leases      
2014 14,266,000    
2015 15,711,000    
2016 14,026,000    
2017 12,341,000    
2018 11,066,000    
Subsequent years 35,906,000    
Total minimum lease payments $ 103,316,000