Segments - Schedule of Net Sales From External Customers (Details) - USD ($) $ in Thousands	3 Months Ended									9 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Oct. 08, 2015	Dec. 31, 2017	Dec. 31, 2016
Revenue from External Customer [Line Items]
Net sales	$ 516,769	$ 535,446	$ 529,230	$ 479,457	$ 462,194	$ 415,563	$ 270,147	$ 244,605	$ 192,539	$ 628,066	$ 2,060,902	$ 1,392,509
Change in net sales											$ 668,393
Percentage change in net sales											48.00%
Gross profit	$ 153,635	$ 154,783	$ 149,532	$ 139,911	$ 132,257	$ 112,966	$ 79,337	$ 72,245	$ 49,206	$ 175,157	$ 597,861	$ 396,805
Change in gross profit											$ 201,056
Percentage change in gross profit											50.70%
Percentage of gross margin											29.00%	28.50%
Percentage change in gross margin											0.50%
SBP Segment
Revenue from External Customer [Line Items]
Net sales											$ 1,790,114	$ 1,293,496
Percentage of net sales											100.00%	100.00%
Change in net sales											$ 496,618
Percentage change in net sales											38.40%
Gross profit											$ 522,189	$ 371,715
Change in gross profit											$ 150,474
Percentage change in gross profit											40.50%
Percentage of gross margin											29.20%	28.70%
Percentage change in gross margin											0.50%
SBP Segment | Wallboard
Revenue from External Customer [Line Items]
Net sales											$ 701,467	$ 525,044
Percentage of net sales											39.20%	40.60%
Change in net sales											$ 176,423
Percentage change in net sales											33.60%
SBP Segment | Suspended ceiling systems
Revenue from External Customer [Line Items]
Net sales											$ 328,815	$ 191,964
Percentage of net sales											18.30%	14.80%
Change in net sales											$ 136,851
Percentage change in net sales											71.30%
SBP Segment | Metal framing
Revenue from External Customer [Line Items]
Net sales											$ 280,410	$ 219,994
Percentage of net sales											15.70%	17.00%
Change in net sales											$ 60,416
Percentage change in net sales											27.50%
SBP Segment | Complementary other products
Revenue from External Customer [Line Items]
Net sales											$ 479,422	$ 356,494
Percentage of net sales											26.80%	27.60%
Change in net sales											$ 122,928
Percentage change in net sales											34.50%
MI Segment
Revenue from External Customer [Line Items]
Net sales											$ 270,788	$ 99,013
Percentage of net sales											100.00%	100.00%
Change in net sales											$ 171,775
Percentage change in net sales											173.50%
Gross profit											$ 75,672	$ 25,090
Change in gross profit											$ 50,582
Percentage change in gross profit											201.60%
Percentage of gross margin											27.90%	25.30%
Percentage change in gross margin											2.60%
MI Segment | Commercial and industrial insulation
Revenue from External Customer [Line Items]
Net sales											$ 206,668	$ 75,929
Percentage of net sales											76.30%	76.70%
Change in net sales											$ 130,739
Percentage change in net sales											172.20%
MI Segment | Non-insulation products
Revenue from External Customer [Line Items]
Net sales											$ 64,120	$ 23,084
Percentage of net sales											23.70%	23.30%
Change in net sales											$ 41,036
Percentage change in net sales											177.80%