Quarterly Results of Operations (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
Net Sales	$ 1,048,291		$ 1,321,342		$ 1,093,163		$ 1,027,131		$ 1,070,493		$ 1,306,999		$ 1,059,103		$ 1,012,280		$ 4,489,927	$ 4,448,875	$ 4,089,854
Gross profit	156,619		207,615		183,513		165,997		152,372		204,107		173,250		160,034		713,744	689,763	634,548
Net income	$ 34,843	[1]	$ 81,274	[1]	$ 30,955	[1]	$ 46,742	[1]	$ 38,191	[2]	$ 84,739	[2]	$ 55,343	[2]	$ 45,721	[2]	$ 193,814	$ 223,994	$ 269,659
Basic net income per share (in dollars per share)	$ 0.31	[1],[3]	$ 0.73	[1],[3]	$ 0.28	[1],[3]	$ 0.42	[1],[3]	$ 0.35	[2],[3]	$ 0.77	[2],[3]	$ 0.50	[2],[3]	$ 0.41	[2],[3]	$ 1.75	$ 2.03	$ 2.44
Diluted net income per share (in dollars per share)	0.31	[1],[3]	0.73	[1],[3]	0.28	[1],[3]	0.42	[1],[3]	0.34	[2],[3]	0.76	[2],[3]	0.50	[2],[3]	0.41	[2],[3]	$ 1.74	$ 2.01	$ 2.42
Dividends per share (in dollars per share)	$ 0.11		$ 0.11		$ 0.11		$ 0.11		$ 0.10		$ 0.10		$ 0.10		$ 0.10
Rationalization charges	$ 7,800	[1]	$ 3,200	[1]	$ 39,300	[1]	$ 6,100	[1]	$ 4,800	[2]	$ 300	[2]	$ 500	[2]	$ 700	[2]	$ 56,351	$ 6,253	$ 5,826
Loss on early extinguishment of debt			$ 1,700										$ 2,500				1,676	2,493	7,052
Business Combination, Acquisition Related Costs	$ 1,800
Corporate Segment [Member]
Net Sales																	0	0	0
Rationalization charges																	0	$ 0	0
Business Combination, Acquisition Related Costs																	$ 1,800		$ 24,700

[1] The first, second, third and fourth quarters of 2019 include rationalization charges of $6.1 million, $39.3 million, $3.2 million and $7.8 million, respectively. The third quarter of 2019 includes a loss on early extinguishment of debt of $1.7 million. The fourth quarter of 2019 includes costs attributed to announced acquisitions of $1.8 million.

[2] The first, second, third and fourth quarters of 2018 include rationalization charges of $0.7 million, $0.5 million, $0.3 million and $4.8 million, respectively. The second quarter of 2018 includes a loss on early extinguishment of debt of $2.5 million.

[3] Net income per share data is computed independently for each of the periods presented. Accordingly, the sum of the quarterly earnings per share amounts may not equal the total for the year.