CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net sales	$ 209,111	$ 186,903	$ 413,422	$ 349,519
Costs and expenses:
Cost of goods sold	145,697	134,152	288,857	251,607
Selling, general and administrative	35,704	29,247	69,970	55,019
Design and development	12,034	9,878	23,755	20,761
Operating income	15,676	13,626	30,840	22,132
Interest expense, net	1,518	1,840	2,928	3,354
Equity in earnings of investee	(555)	(153)	(735)	(296)
Other expense (income), net	605	(406)	795	(225)
Income before income taxes	14,108	12,345	27,852	19,299
Provision for income taxes	5,189	1,350	9,760	2,195
Net income	8,919	10,995	18,092	17,104
Net loss attributable to noncontrolling interest	(100)	(576)	(130)	(1,706)
Net income attributable to Stoneridge, Inc.	$ 9,019	$ 11,571	$ 18,222	$ 18,810
Earnings per share attributable to Stoneridge, Inc.:
Basic (in dollars per share)	$ 0.32	$ 0.42	$ 0.65	$ 0.68
Diluted (in dollars per share)	$ 0.32	$ 0.41	$ 0.64	$ 0.67
Weighted-average shares outstanding:
Basic (in shares)	28,133,432	27,790,639	28,025,805	27,733,288
Diluted (in shares)	28,517,442	28,262,154	28,530,679	28,207,754

Interest expense incurred and charged against earnings during the reporting period on all debt, including interest on short-term obligations and long-term debt, and amortization of debt issuance costs and debt discounts. Interest expense is net of interest income earned during the reporting period.

No definition available.