Industry Segments (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Segment	Jun. 30, 2014 USD ($)
Segment Reporting Information [Line Items]
Number of reportable operating segments | Segment				2
Net sales		$ 269,382	$ 272,540	$ 496,971	$ 505,292
Operating Income		21,312	17,620	36,227	38,025
Litigation charge		0	10,650	0	10,650
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales		0	0	0	0
Engine Management [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net sales		176,992	184,181	354,063	363,475
Operating Income		21,839	27,112	43,555	51,484
Engine Management [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales		5,030	6,231	10,053	12,184
Temperature Control [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net sales		89,079	85,660	137,807	137,145
Operating Income		3,165	4,991	1,746	5,604
Temperature Control [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales		1,925	2,133	3,369	4,367
All Other [Member]
Segment Reporting Information [Line Items]
Net sales		3,311	2,699	5,101	4,672
Operating Income	[1]	(3,692)	(14,483)	(9,074)	(19,063)
All Other [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales		$ (6,955)	$ (8,364)	$ (13,422)	$ (16,551)

[1] During the second quarter of 2014, we recorded a $10.6 million litigation charge in connection with a settlement agreement in a legal proceeding with a third party (see Note 14 for additional details).