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INCOME TAXES - RECONCILIATION OF CORPORATE TAX RATE (Details)
3 Months Ended
Mar. 31, 2017
Rate
Mar. 31, 2016
Rate
Income Tax Disclosure [Abstract]    
U.S. statutory corporate rate 35.00% 35.00%
Non-taxable income and nondeductible benefits, net (1.10%) 0.80%
State taxes 1.70% 1.20%
Estimated annual effective tax rate 35.60% 37.00%