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INCOME TAXES
3 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]  
Income Taxes
INCOME TAXES
Income tax expense for the first quarter of 2018 was computed using an estimated annual effective tax rate (“ETR”). The estimated ETR is revised, as necessary, at the end of successive interim reporting periods. Income tax expense for first quarter of 2017 was computed using a discrete effective tax rate method.