Segments - Schedule of Net Sales From External Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue from External Customer [Line Items]
Net sales	$ 564,906	$ 542,273	$ 1,639,689	$ 1,528,153
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Change in net sales	$ 22,633		$ 111,536
Percentage change in net sales	4.20%		7.30%
Wallboard
Revenue from External Customer [Line Items]
Net sales	$ 207,326	$ 203,991	$ 624,299	$ 583,242
Percentage of net sales	36.70%	37.60%	38.10%	38.20%
Change in net sales	$ 3,335		$ 41,057
Percentage change in net sales	1.60%		7.00%
Suspended ceiling systems
Revenue from External Customer [Line Items]
Net sales	$ 118,873	$ 104,422	$ 314,045	$ 288,356
Percentage of net sales	21.00%	19.30%	19.20%	18.90%
Change in net sales	$ 14,451		$ 25,689
Percentage change in net sales	13.80%		8.90%
Metal framing
Revenue from External Customer [Line Items]
Net sales	$ 98,817	$ 98,576	$ 300,493	$ 264,019
Percentage of net sales	17.50%	18.20%	18.30%	17.30%
Change in net sales	$ 241		$ 36,474
Percentage change in net sales	0.20%		13.80%
Complementary and other products
Revenue from External Customer [Line Items]
Net sales	$ 139,890	$ 135,284	$ 400,852	$ 392,536
Percentage of net sales	24.80%	24.90%	24.40%	25.70%
Change in net sales	$ 4,606		$ 8,316
Percentage change in net sales	3.40%		2.10%