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INDEBTEDNESS (Schedule of Long-term Debt and Capital Lease Obligations) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
INDEBTEDNESS [Abstract]    
Borrowings on credit facility $ 183,926 $ 192,885
Capital lease obligations 6,962 6,923
Subtotal 190,888 199,808
Less current portion (4,211) (3,845)
Total long-term debt and capital lease obligations $ 186,677 $ 195,963