Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Data [Abstract]
Sales	$ 1,735,866	$ 1,771,647	$ 1,779,315	$ 1,495,690	$ 1,627,120	$ 1,651,415	$ 1,502,532	$ 1,297,473	$ 6,782,518	$ 6,078,540	$ 5,428,477
Gross profit	423,344	436,542	436,448	352,448	391,273	401,270	385,176	323,481	1,648,782	1,501,200	1,324,651
Net income	$ 98,931	$ 88,388	$ 88,263	$ 48,378	$ 91,474	$ 95,529	$ 92,540	$ 55,714	$ 323,960	$ 335,257	$ 172,492
Diluted net income per share (in dollars per share)	$ 1.58	$ 1.42	$ 1.42	$ 0.78	$ 1.47	$ 1.50	$ 1.43	$ 0.85	$ 5.20	$ 5.24	$ 2.69