Subsequent Events	3 Months Ended
Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On April 3, 2017, the Company acquired the operations and certain assets of the specialty building products division of Irwin Builders Supply Corporation ("Irwin") located in Irwin, Pennsylvania. Irwin was a provider of a broad range of building products including drywall, metal studs, ceiling and wall systems, insulation and other complementary products to the Pennsylvania market. On April 30, 2017, the Company acquired the operations and certain assets of the Atlanta branch of Trident Distribution, a division of Performance Contracting, Inc. ("Trident"). Trident was a distributor of mechanical insulation and related products. Trident offered insulation fabrication services in addition to a full line of commercial and industrial insulation products and accessories supplying mechanical insulation contractors across the Georgia market. On May 1, 2017, the Company acquired all of the stock of Wallboard, Inc. ("Wallboard") with two branch locations in the Minneapolis-St. Paul metropolitan area. Wallboard was an independent distributor of wallboard, steel framing, insulation and finishing products primarily servicing the commercial segment as well as the multi-family segment of the residential business. On May 1, 2017, the Company acquired the operations and certain assets of Gypsum Wallboard Supply, Inc. ("GWSI") in Tacoma, Washington. GWSI was an independent distributor of specialty building products including wallboard, steel framing, suspended ceiling systems and other complementary products. GWSI primarily serviced the commercial segment as well as the multi-family segment of the residential business in the Seattle metropolitan market. The purchase price allocations for these acquisitions are in process and are subject to change as additional information becomes available concerning the fair values and tax bases of the acquired assets and liabilities. Any adjustments to the purchase price allocations will be made as soon as practicable but no later than one year from the acquisition dates.

Subsequent Events

On April 3, 2017, the Company acquired the operations and certain assets of the specialty building products division of Irwin Builders Supply Corporation ("Irwin") located in Irwin, Pennsylvania. Irwin was a provider of a broad range of building products including drywall, metal studs, ceiling and wall systems, insulation and other complementary products to the Pennsylvania market.

On April 30, 2017, the Company acquired the operations and certain assets of the Atlanta branch of Trident Distribution, a division of Performance Contracting, Inc. ("Trident"). Trident was a distributor of mechanical insulation and related products. Trident offered insulation fabrication services in addition to a full line of commercial and industrial insulation products and accessories supplying mechanical insulation contractors across the Georgia market.

On May 1, 2017, the Company acquired all of the stock of Wallboard, Inc. ("Wallboard") with two branch locations in the Minneapolis-St. Paul metropolitan area. Wallboard was an independent distributor of wallboard, steel framing, insulation and finishing products primarily servicing the commercial segment as well as the multi-family segment of the residential business.

On May 1, 2017, the Company acquired the operations and certain assets of Gypsum Wallboard Supply, Inc. ("GWSI") in Tacoma, Washington. GWSI was an independent distributor of specialty building products including wallboard, steel framing, suspended ceiling systems and other complementary products. GWSI primarily serviced the commercial segment as well as the multi-family segment of the residential business in the Seattle metropolitan market.

The purchase price allocations for these acquisitions are in process and are subject to change as additional information becomes available concerning the fair values and tax bases of the acquired assets and liabilities. Any adjustments to the purchase price allocations will be made as soon as practicable but no later than one year from the acquisition dates.