Segments - Schedule of Net Sales From External Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue from External Customer [Line Items]
Net sales	$ 559,911	$ 522,219	$ 1,074,783	$ 985,880
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Change in net sales	$ 37,692		$ 88,903
Percentage change in net sales	7.20%		9.00%
Wallboard
Revenue from External Customer [Line Items]
Net sales	$ 214,059	$ 198,598	$ 416,973	$ 379,252
Percentage of net sales	38.20%	38.00%	38.80%	38.50%
Change in net sales	$ 15,461		$ 37,721
Percentage change in net sales	7.80%		9.90%
Suspended ceiling systems
Revenue from External Customer [Line Items]
Net sales	$ 106,176	$ 97,755	$ 195,172	$ 183,933
Percentage of net sales	19.00%	18.70%	18.20%	18.70%
Change in net sales	$ 8,421		$ 11,239
Percentage change in net sales	8.60%		6.10%
Metal framing
Revenue from External Customer [Line Items]
Net sales	$ 102,425	$ 91,476	$ 201,676	$ 165,443
Percentage of net sales	18.30%	17.50%	18.80%	16.80%
Change in net sales	$ 10,949		$ 36,233
Percentage change in net sales	12.00%		21.90%
Complementary and other products
Revenue from External Customer [Line Items]
Net sales	$ 137,251	$ 134,390	$ 260,962	$ 257,252
Percentage of net sales	24.50%	25.80%	24.20%	26.00%
Change in net sales	$ 2,861		$ 3,710
Percentage change in net sales	2.10%		1.40%