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Industry Segment and Geographic Data (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) Customer Segment | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reportable operating segments | Segment |  |  |  |  |  |  |  |  | 2 |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 229,799 | $ 300,795 | $ 288,977 | $ 238,911 | $ 204,967 | $ 270,037 | $ 269,382 | $ 227,589 | $ 1,058,482 | $ 971,975 | $ 980,392
Depreciation and amortization |  |  |  |  |  |  |  |  | 20,457 | 17,637 | 17,295
Operating income (loss) |  |  |  |  |  |  |  |  | 98,067 | 75,860 | 85,338
Investment in equity affiliates | 19,924 |  |  |  | 20,622 |  |  |  | 19,924 | 20,622 | 20,004
Capital expenditures |  |  |  |  |  |  |  |  | 20,921 | 18,047 | 13,904
Total assets | 768,697 |  |  |  | 681,064 |  |  |  | 768,697 | 681,064 | 673,551
Reconciliation of segment operating income to net earnings [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 98,067 | 75,860 | 85,338
Other non-operating income (expense) |  |  |  |  |  |  |  |  | 2,059 | (220) | (1,969)
Interest expense |  |  |  |  |  |  |  |  | 1,556 | 1,537 | 1,616
Earnings from continuing operations before taxes |  |  |  |  |  |  |  |  | 98,570 | 74,103 | 81,753
Income tax expense |  |  |  |  |  |  |  |  | 36,158 | 25,983 | 28,854
Earnings from continuing operations | 8,839 | 21,055 | 19,862 | 12,656 | 5,779 | 19,194 | 13,808 | 9,339 | 62,412 | 48,120 | 52,899
Discontinued operations, net of tax | (487) | (425) | (618) | (452) | (553) | (728) | (430) | (391) | (1,982) | (2,102) | (9,870)
Net earnings | 8,352 | 20,630 | 19,244 | 12,204 | 5,226 | 18,466 | 13,378 | 8,948 | 60,430 | 46,018 | 43,029
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues | 229,799 | $ 300,795 | $ 288,977 | $ 238,911 | 204,967 | $ 270,037 | $ 269,382 | $ 227,589 | 1,058,482 | 971,975 | 980,392
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 243,349 |  |  |  | 190,586 |  |  |  | $ 243,349 | $ 190,586 | $ 192,578
Number of largest individual customers | Customer |  |  |  |  |  |  |  |  | 5 |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 70.00% | 68.00% | 69.00%
Litigation charge |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 10,650
Five Largest Individual Customers [Member] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 70.00% | 68.00% | 69.00%
O' Reilly Automotive, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 20.00% |  |
NAPA Auto Parts [Member] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 18.00% |  |
Advance Auto Parts, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 17.00% |  |
AutoZone, Inc [Member] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales by major customer |  |  |  |  |  |  |  |  | 11.00% |  |
United States [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 952,019 | $ 881,206 | $ 884,701
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 952,019 | 881,206 | 884,701
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 204,592 |  |  |  | 155,438 |  |  |  | 204,592 | 155,438 | 158,350
Canada [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 53,324 | 48,072 | 51,526
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 53,324 | 48,072 | 51,526
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 1,344 |  |  |  | 1,190 |  |  |  | 1,344 | 1,190 | 1,546
Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 14,703 | 16,305 | 18,061
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 14,703 | 16,305 | 18,061
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 13,612 |  |  |  | 12,324 |  |  |  | 13,612 | 12,324 | 11,725
Other Foreign [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 38,436 | 26,392 | 26,104
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 38,436 | 26,392 | 26,104
Long-lived assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 23,801 |  |  |  | 21,634 |  |  |  | 23,801 | 21,634 | 20,957
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 0 | 0
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Engine Management [Member] | Reportable Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 765,539 | 698,021 | 709,263
Depreciation and amortization |  |  |  |  |  |  |  |  | 15,008 | 12,256 | 12,425
Operating income (loss) |  |  |  |  |  |  |  |  | 101,529 | 88,007 | 103,861
Investment in equity affiliates | 6,221 |  |  |  | 6,430 |  |  |  | 6,221 | 6,430 | 6,368
Capital expenditures |  |  |  |  |  |  |  |  | 14,202 | 13,038 | 10,748
Total assets | 506,625 |  |  |  | 413,102 |  |  |  | 506,625 | 413,102 | 409,275
Reconciliation of segment operating income to net earnings [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 101,529 | 88,007 | 103,861
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 765,539 | 698,021 | 709,263
Engine Management [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 22,268 | 20,178 | 23,633
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 22,268 | 20,178 | 23,633
Temperature Control [Member] | Reportable Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 283,740 | 264,478 | 259,065
Depreciation and amortization |  |  |  |  |  |  |  |  | 4,287 | 4,329 | 4,171
Operating income (loss) |  |  |  |  |  |  |  |  | 17,563 | 6,382 | 6,445
Investment in equity affiliates | 13,703 |  |  |  | 14,192 |  |  |  | 13,703 | 14,192 | 13,636
Capital expenditures |  |  |  |  |  |  |  |  | 3,652 | 3,027 | 2,624
Total assets | 171,136 |  |  |  | 177,201 |  |  |  | 171,136 | 177,201 | 173,070
Reconciliation of segment operating income to net earnings [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 17,563 | 6,382 | 6,445
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 283,740 | 264,478 | 259,065
Temperature Control [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 7,293 | 6,542 | 6,966
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 7,293 | 6,542 | 6,966
Other [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 9,203 | 9,476 | 12,064
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,162 | 1,052 | 699
Operating income (loss) |  |  |  |  |  |  |  |  | (21,025) | (18,529) | (24,968)
Investment in equity affiliates | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Capital expenditures |  |  |  |  |  |  |  |  | 3,067 | 1,982 | 532
Total assets | $ 90,936 |  |  |  | $ 90,761 |  |  |  | 90,936 | 90,761 | 91,206
Reconciliation of segment operating income to net earnings [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | (21,025) | (18,529) | (24,968)
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 9,203 | 9,476 | 12,064
Other [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Financial information for reportable segment [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (29,561) | (26,720) | (30,599)
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ (29,561) | $ (26,720) | $ (30,599)

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