INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax expense	$ 9,327	$ 11,215	$ 16,980	$ 21,685
Effective tax rate	20.40%	33.00%	20.20%	31.50%
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 100	$ 0		$ 1,200
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%	35.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 2,900		$ 2,900		$ 2,900