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SUBSEQUENT EVENT SUBSEQUENT EVENT	12 Months Ended
SUBSEQUENT EVENT SUBSEQUENT EVENT	Dec. 31, 2017
Subsequent Events [Abstract]
SUBSEQUENT EVENT	SUBSEQUENT EVENT On January 2, 2018, Headwater Company, LLC, a wholly owned subsidiary of the Company, acquired 100 percent interest of Valley Farm Supply, Inc. (Valley Farms) of Lansing, Michigan for approximately $9.0 million. Valley Farms will continue to operate as a professional groundwater distributor and will be included as a part of the Distribution Segment of the Company.