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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On October 1, 2017, the Company acquired the operations and substantially all of the assets of MCS Door & Hardware (“MCS"). MCS was an independent distributor of specialty building products including doors, frames, hardware and toilet partitions in connection with new construction and repair and remodel projects in the commercial market in Texas. MCS operated one branch in Texas. On November 1, 2017, the Company acquired all of the shares of Del-Pro Building Supplies, Inc. ("DPSI"). DPSI was an independent distributor of specialty building products including wallboard, metal framing, insulation, basement blanket and spray foam products in the commercial and residential markets. Del-Pro operated one branch in Ontario, Canada. The Company expects to record the purchase price allocations during the fourth quarter of 2017.