Quarterly Results of Operations (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		Mar. 31, 2014	Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Net sales	$ 805,891		$ 1,139,643		$ 874,642		$ 792,738		$ 829,616		$ 1,203,525		$ 914,229		$ 816,601			$ 3,612,914		$ 3,763,971	$ 3,911,790
Gross profit	110,013		181,939		127,707		113,877		113,126		185,106		133,657		122,237			533,536		554,126	599,830
Net income	$ 23,694	[1]	$ 69,770	[1]	$ 33,315	[1]	$ 26,572	[1]	$ 26,549	[2]	$ 70,316	[2]	$ 42,244	[2]	$ 33,304	[2]		$ 153,351		$ 172,413	$ 182,391
Basic net income per share (in dollars per share)	$ 0.41	[1],[3]	$ 1.15	[1],[3]	$ 0.55	[1],[3]	$ 0.44	[1],[3]	$ 0.44	[2],[3]	$ 1.16	[2],[3]	$ 0.70	[2],[3]	$ 0.53	[2],[3]		$ 2.56		$ 2.83	$ 2.88
Diluted net income per share (in dollars per share)	0.41	[1],[3]	1.15	[1],[3]	0.55	[1],[3]	0.44	[1],[3]	0.44	[2],[3]	1.16	[2],[3]	0.70	[2],[3]	0.53	[2],[3]		2.55		2.81	2.86
Dividends per share (in dollars per share)	$ 0.17		$ 0.17		$ 0.17		$ 0.17		$ 0.16		$ 0.16		$ 0.16		$ 0.16			$ 0.68		$ 0.64	$ 0.60
Rationalization charges	$ 5,100	[1]	$ 7,800	[1]	$ 5,000	[1]	$ 1,100	[1]	$ 3,600	[2]	$ 9,100	[2]	$ 1,000	[2]	$ 700	[2]		$ 19,061		$ 14,407	$ 14,481
Operating Income (Loss)																		299,730		319,812	360,853
Loss on early extinguishment of debt																	$ 1,500	0		0	1,474
Business Combination, Acquisition Related Costs	$ 1,400
Corporate Segment [Member]
Net sales																		0		0	0
Rationalization charges																				0	0
Operating Income (Loss)																		(20,003)	[4]	$ (16,200)	$ (14,938)
Business Combination, Acquisition Related Costs																		$ 1,400

[1] The first, second, third and fourth quarters of 2016 include rationalization charges of $1.1 million, $5.0 million, $7.8 million and $5.1 million, respectively. The fourth quarter of 2016 includes costs attributed to announced acquisitions of $1.4 million.

[2] The first, second, third and fourth quarters of 2015 include rationalization charges of $0.7 million, $1.0 million, $9.1 million and $3.6 million, respectively.

[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.

[4] Corporate includes costs attributed to announced acquisitions of $1.4 million.