CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Building products	$ 2,336,041	$ 1,146,190	$ 937,048
Construction services	757,702	430,556	374,450
Net sales	3,093,743	1,576,746	1,311,498
Building products	1,725,843	864,485	705,812
Construction services	625,935	350,851	310,612
Cost of sales	2,351,778	1,215,336	1,016,424
Gross profit	741,965	361,410	295,074
Selling, general and administrative expenses	571,799	306,843	229,316
Depreciation expense	38,441	15,700	11,492
Amortization expense	20,721	3,626	0
Impairment of assets	11,928	0	134
Merger and integration costs	15,340	22,993	0
Total operating expenses	658,229	349,162	240,942
Income from operations	83,736	12,248	54,132
Other income (expense)
Interest expense	(30,131)	(27,552)	(27,090)
Loss on debt extinguishment	(12,529)	0	0
Other income, net	4,070	784	1,413
Income (loss) before income taxes	45,146	(14,520)	28,455
Income tax expense (benefit)	14,266	(9,689)	(65,577)
Net income (loss)	$ 30,880	$ (4,831)	$ 94,032
Weighted average common shares outstanding
Basic (in shares)	66,055	41,260	38,828
Diluted (in shares)	66,609	41,260	39,291
Net income (loss) per share
Basic (in dollars per share)	$ 0.47	$ (0.12)	$ 2.42
Diluted (in dollars per share)	$ 0.46	$ (0.12)	$ 2.39