CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net sales	$ 825,405	$ 834,202
Cost of sales	609,283	635,118
Gross profit	216,122	199,084
Selling, general and administrative expenses	169,934	160,204
Depreciation expense	9,573	9,506
Amortization expense	4,347	3,657
Merger and integration costs	2,790	1,687
Total operating expenses	186,644	175,054
Income from operations	29,478	24,030
Other income (expense)
Interest expense	(6,038)	(5,982)
Other income, net	2,910	1,950
Income before income taxes	26,350	19,998
Income tax expense	6,000	4,639
Net income	$ 20,350	$ 15,359
Weighted average common shares outstanding
Basic (in shares)	66,782	67,138
Diluted (in shares)	67,282	67,664
Net income per common share
Basic (in dollars per share)	$ 0.30	$ 0.23
Diluted (in dollars per share)	$ 0.30	$ 0.23
Building Products [Member]
Net sales	$ 620,915	$ 645,954
Cost of sales	444,937	480,301
Construction Services [Member]
Net sales	204,490	188,248
Cost of sales	$ 164,346	$ 154,817