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INCOME TAXES (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Income Tax Disclosure [Abstract]          
Income tax expense $ 11,215 $ 11,308 $ 21,685 $ 21,186  
Effective tax rate 33.00% 33.40% 31.50% 33.30%  
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense $ 0   $ 1,200    
Unrecognized Tax Benefits that Would Impact Effective Tax Rate         $ 2,400