Business Segments (Tables)

3 Months Ended

Mar. 31, 2013

Segment Reporting Measurement Disclosures [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

		Three Months Ended
		March 31,
		2013		2012
Metalworking Process Chemicals
	Net sales	$	164,936	$	165,975
	Operating income for reportable segment		32,027		30,975
Coatings
	Net sales		10,746		10,523
	Operating income for reportable segment		2,506		2,513
Other Chemical Products
	Net sales		511		1,140
	Operating (loss) income for reportable segment		(21)		142
Total
	Net sales		176,193		177,638
	Operating income for reportable segments		34,512		33,630
Non-operating expenses			(16,222)		(16,182)
Amortization expense			(879)		(746)
Consolidated operating income			17,411		16,702
Interest expense			(744)		(1,174)
Interest income			169		123
Other income, net			346		341
Consolidated income before taxes and equity in net income of associated companies		$	17,182	$	15,992