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Industry Segment and Geographic Data (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2014 USD ($) | Jun. 30, 2014 USD ($) | Mar. 31, 2014 USD ($) | Dec. 31, 2015 USD ($) Customer Segment | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reportable operating segments | Segment |  |  |  |  |  |  |  |  | 2 |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 971,975 | $ 980,392 | $ 983,704
Depreciation and amortization |  |  |  |  |  |  |  |  | 17,637 | 17,295 | 17,595
Operating income (loss) |  |  |  |  |  |  |  |  | 75,860 | 85,338 | 86,863
Investment in equity affiliates | $ 20,622 |  |  |  | $ 20,004 |  |  |  | 20,622 | 20,004 | 6,308
Capital expenditures |  |  |  |  |  |  |  |  | 18,047 | 13,904 | 11,410
Total assets | 681,064 |  |  |  | 673,551 |  |  |  | 681,064 | 673,551 | 615,523
Reconciliation of segment operating income to net earnings [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 75,860 | 85,338 | 86,863
Other non-operating income (expense) |  |  |  |  |  |  |  |  | (220) | (1,969) | 1
Interest expense |  |  |  |  |  |  |  |  | 1,537 | 1,616 | 1,902
Earnings from continuing operations before taxes |  |  |  |  |  |  |  |  | 74,103 | 81,753 | 84,962
Income tax expense |  |  |  |  |  |  |  |  | 25,983 | 28,854 | 31,919
Earnings from continuing operations | 5,779 | $ 19,194 | $ 13,808 | $ 9,339 | 11,517 | $ 17,806 | $ 11,169 | $ 12,407 | 48,120 | 52,899 | 53,043
Discontinued operations, net of tax | (553) | (728) | (430) | (391) | (419) | (8,240) | (529) | (682) | (2,102) | (9,870) | (1,593)
Net earnings | 5,226 | 18,466 | 13,378 | 8,948 | 11,098 | 9,566 | 10,640 | 11,725 | 46,018 | 43,029 | 51,450
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues | 204,967 | $ 270,037 | $ 269,382 | $ 227,589 | 218,054 | $ 257,046 | 272,540 | $ 232,752 | 971,975 | 980,392 | 983,704
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 190,586 |  |  |  | 192,578 |  |  |  | $ 190,586 | $ 192,578 | $ 159,167
Number of largest individual customers | Customer |  |  |  |  |  |  |  |  | 5 |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 68.00% | 69.00% | 66.00%
Litigation charge |  |  |  |  |  |  | $ (10,600) |  | $ 0 | $ 10,650 | $ 0
Five Largest Individual Customers [Member] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 68.00% | 69.00% | 66.00%
NAPA Auto Parts [Member] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 19.00% |  |
Advance Auto Parts, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 17.00% |  |
O' Reilly Automotive, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 19.00% |  |
AutoZone, Inc [Member] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 11.00% |  |
United States [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 881,206 | $ 884,701 | $ 895,648
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 155,438 |  |  |  | 158,350 |  |  |  | 155,438 | 158,350 | 135,834
Canada [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 48,072 | 51,526 | 46,133
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 1,190 |  |  |  | 1,546 |  |  |  | 1,190 | 1,546 | 1,526
Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 16,305 | 18,061 | 15,413
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 12,324 |  |  |  | 11,725 |  |  |  | 12,324 | 11,725 | 11,310
Other Foreign [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 26,392 | 26,104 | 26,510
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 21,634 |  |  |  | 20,957 |  |  |  | 21,634 | 20,957 | 10,497
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 0 | 0
Engine Management [Member] | Reportable Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 698,021 | 709,263 | 711,245
Depreciation and amortization |  |  |  |  |  |  |  |  | 12,256 | 12,425 | 13,235
Operating income (loss) |  |  |  |  |  |  |  |  | 88,007 | 103,861 | 96,335
Investment in equity affiliates | 6,430 |  |  |  | 6,368 |  |  |  | 6,430 | 6,368 | 6,308
Capital expenditures |  |  |  |  |  |  |  |  | 14,574 | 11,182 | 8,628
Total assets | 413,102 |  |  |  | 409,275 |  |  |  | 413,102 | 409,275 | 384,712
Reconciliation of segment operating income to net earnings [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 88,007 | 103,861 | 96,335
Engine Management [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 20,178 | 23,633 | 25,720
Temperature Control [Member] | Reportable Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 264,478 | 259,065 | 262,537
Depreciation and amortization |  |  |  |  |  |  |  |  | 4,329 | 4,171 | 3,763
Operating income (loss) |  |  |  |  |  |  |  |  | 6,382 | 6,445 | 9,147
Investment in equity affiliates | 14,192 |  |  |  | 13,636 |  |  |  | 14,192 | 13,636 | 0
Capital expenditures |  |  |  |  |  |  |  |  | 3,418 | 2,650 | 2,682
Total assets | 177,201 |  |  |  | 173,070 |  |  |  | 177,201 | 173,070 | 150,280
Reconciliation of segment operating income to net earnings [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 6,382 | 6,445 | 9,147
Temperature Control [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 6,542 | 6,966 | 6,329
Other [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 9,476 | 12,064 | 9,922
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,052 | 699 | 597
Operating income (loss) |  |  |  |  |  |  |  |  | (18,529) | (24,968) | (18,619)
Investment in equity affiliates | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Capital expenditures |  |  |  |  |  |  |  |  | 55 | 72 | 100
Total assets | $ 90,761 |  |  |  | $ 91,206 |  |  |  | 90,761 | 91,206 | 80,531
Reconciliation of segment operating income to net earnings [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | (18,529) | (24,968) | (18,619)
Other [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ (26,720) | $ (30,599) | $ (32,049)

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