CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Number of Common Shares outstanding	Treasury Shares	Additional Paid-In Capital	Retained earnings	Accumulated other comprehensive loss	Noncontrolling interest	Total
Balance at Dec. 31, 2016		$ (5,632)	$ 206,504	$ 45,356	$ (67,913)	$ 13,762	$ 192,077
Net income				45,179		(130)	45,049
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2016	27,850
Treasury Stock, Shares, Beginning Balance at Dec. 31, 2016		1,116
Net income attributable to Stoneridge, Inc.							45,179
Unrealized gain(loss) on derivatives, net					(125)		(125)
Currency translation adjustments					15,473	826	16,299
Acquisition of noncontrolling interest, net			15,820		(16,995)	$ (14,458)	(15,633)
Issuance of restricted Common Shares ( in shares)	462	(462)
Repurchased Common Shares for treasury		$ (1,486)					(1,486)
Repurchased Common Shares for treasury (in shares)	(132)	132
Share-based compensation			6,162				6,162
Balance at Dec. 31, 2017		$ (7,118)	228,486	92,264	(69,560)		244,072
Common Stock, Shares, Outstanding, Ending Balance at Dec. 31, 2017	28,180
Treasury Stock, Shares, Ending Balance at Dec. 31, 2017		786
Cumulative effect of a accounting change | ASU 2016-09				1,729			1,729
Net income				53,848			53,848
Net income attributable to Stoneridge, Inc.							53,848
Unrealized gain(loss) on derivatives, net					435		435
Currency translation adjustments					(16,627)		(16,627)
Issuance of Common Shares ( in shares)	461
Issuance of restricted Common Shares ( in treasury shares)		(461)
Repurchased Common Shares for treasury		$ (1,762)					(1,762)
Repurchased Common Shares for treasury (in shares)	(153)
Repurchased Common Shares for treasury (in treasury shares)		153
Share-based compensation			3,161				3,161
Balance at Dec. 31, 2018		$ (8,880)	231,647	146,251	(85,752)		$ 283,266
Common Stock, Shares, Outstanding, Ending Balance at Dec. 31, 2018	28,488						28,488
Treasury Stock, Shares, Ending Balance at Dec. 31, 2018		478					478
Cumulative effect of a accounting change				139			$ 139
Net income				60,291			60,291
Net income attributable to Stoneridge, Inc.							60,291
Unrealized gain(loss) on derivatives, net					(292)		(292)
Currency translation adjustments					(5,428)		(5,428)
Issuance of Common Shares ( in shares)	407
Issuance of restricted Common Shares ( in treasury shares)		(407)
Repurchased Common Shares for treasury		$ (1,893)					(1,893)
Repurchased Common Shares for treasury (in shares)	(137)
Repurchased Common Shares for treasury (in treasury shares)		137
Common Share repurchase program		$ (40,000)	(10,000)				(50,000)
Common Share repurchase program (in shares)	(1,350)
Common Share repurchase program (in treasury shares)		1,350
Share-based compensation			3,960				3,960
Balance at Dec. 31, 2019		$ (50,773)	$ 225,607	$ 206,542	$ (91,472)		$ 289,904
Common Stock, Shares, Outstanding, Ending Balance at Dec. 31, 2019	27,408						27,408
Treasury Stock, Shares, Ending Balance at Dec. 31, 2019		1,558					1,558