SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - REVENUE RECOGNITION (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Promotional Costs, Estimate Deviation, Percentage (Less Than)	3.00%	3.00%	3.00%
Unsettled Accrued Liabilities	$ 180,959	$ 171,449
Revenue from Contract with Customer Benchmark \| Customer Concentration Risk \| McLane Company, Inc.
Concentration Risk, Percentage	30.00%	28.00%	29.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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