Segment Information (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Summary of Segment Information

	Three Months Ended March 31,
	2017			2016
	(in thousands)
Net sales:
Automotive	$	1,998,383		$	1,932,178
Industrial	1,232,082			1,152,627
Office products	519,005			476,654
Electrical/electronic materials	184,417			175,847
Other	(28,246		)	(19,039		)
Total net sales	$	3,905,641		$	3,718,267
Operating profit:
Automotive	$	151,757		$	153,710
Industrial	90,374			81,833
Office products	31,119			34,204
Electrical/electronic materials	13,635			14,841
Total operating profit	286,885			284,588
Interest expense, net	(6,174		)	(4,822		)
Other intangible assets amortization	(10,806		)	(8,760		)
Other, net	(26,130		)	(24,361		)
Income before income taxes	$	243,775		$	246,645