Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Data [Abstract]
Sales	$ 1,217,789	$ 1,185,067	$ 1,130,777	$ 982,996	$ 1,105,618	$ 1,456,000	$ 1,124,327	$ 1,033,345	$ 4,516,629	$ 4,719,290	$ 4,479,648
Gross profit	312,772	260,770	284,503	247,578	310,274	415,623	319,414	293,731	1,105,623	1,339,042	1,319,178
Net income	$ 62,581	$ 32,312	$ 71,166	$ 46,889	$ 110,682	$ 155,173	$ 100,943	$ 88,563	$ 212,948	$ 455,361	$ 454,029
Diluted net income per share (in dollars per share)	$ 0.97	$ 0.50	$ 1.09	$ 0.71	$ 1.66	$ 2.30	$ 1.49	$ 1.30	$ 3.27	$ 6.75	$ 6.65