CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 175,764	$ 203,386	$ 458,275	$ 643,924
Costs and expenses:
Cost of goods sold	129,769	151,531	353,629	474,389
Selling, general and administrative	24,414	30,978	81,610	94,088
Gain on disposal of Non-core Products, net				(33,599)
Design and development	11,754	11,554	36,373	38,838
Operating income	9,827	9,323	(13,337)	70,208
Interest expense, net	1,882	1,149	4,322	3,153
Equity in loss (earnings) of investee	(330)	(318)	(556)	(1,230)
Other income , net	(253)	381	(1,879)	(148)
(Loss) income before income taxes	8,528	8,111	(15,224)	68,433
(Benefit) provision for income taxes	1,814	1,450	(3,694)	12,351
Net (loss) income	6,714	6,661	(11,530)	56,082
Net income attributable to Stoneridge, Inc.	$ 6,714	$ 6,661	$ (11,530)	$ 56,082
(Loss) earnings per share:
Basic (in dollars per share)	$ 0.25	$ 0.24	$ (0.43)	$ 2.01
Diluted (in dollars per share)	$ 0.25	$ 0.24	$ (0.43)	$ 1.97
Weighted-average shares outstanding:
Basic (in shares)	26,956,286	27,369,824	27,046,899	27,928,760
Diluted (in shares)	27,222,882	27,795,511	27,046,899	28,425,244