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OPERATING LEASES (Net Rent Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
OPERATING LEASES      
Total net rent expense $ 9,292 $ 10,263 $ 9,881
Net Occupancy      
OPERATING LEASES      
Rent expense charged to equipment expense 9,287 10,210 9,840
Less sublease income (25) 0 (52)
Total net rent expense 9,262 10,210 9,788
Equipment      
OPERATING LEASES      
Rent expense charged to equipment expense $ 30 $ 53 $ 93
Minimum      
OPERATING LEASES      
Period for which option to extend the lease term is available 5 years    
Maximum      
OPERATING LEASES      
Period for which option to extend the lease term is available 15 years