CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total Diodes Incorporated Stockholders' Equity	Noncontrolling Interest
BALANCE at Dec. 31, 2015	$ 842,997	$ 32,404	$ (11,009)	$ 344,086	$ 514,280	$ (84,416)	$ 795,345	$ 47,652
Common stock shares beginning at Dec. 31, 2015		48,614,000	(466,000)
Total comprehensive income	(9,773)				15,935	(28,250)	(12,315)	2,542
Dividends to noncontrolling interest	(5,746)							(5,746)
Common stock issued for share-based plans	120	$ 515		(395)			120
Common stock issued for share-based plans, shares		762,000
Net excess tax benefit from share-based compensation	(567)			(567)			(567)
Stock buyback	(18,014)		$ (18,014)				(18,014)
Stock buyback, shares			(691,000)
Share-based compensation	13,978			13,978			13,978
Tax related to net share settlement	(2,528)			(2,528)			(2,528)
BALANCE at Dec. 31, 2016	820,467	$ 32,919	$ (29,023)	354,574	530,215	(112,666)	776,019	44,448
Common stock shares ending at Dec. 31, 2016		49,376,000	(1,157,000)
Total comprehensive income	29,452				(1,805)	29,186	27,381	2,071
Noncontrolling interests	476			(165)			(165)	641
Dividends to noncontrolling interest	(4,746)							(4,746)
Adoption of new accounting standard, ASU 2016-09	5,048			771	4,277		5,048
Common stock issued for share-based plans	13,606	$ 808		12,798			13,606
Common stock issued for share-based plans, shares		1,211,000
Stock buyback	$ (8,745)		$ (8,745)				(8,745)
Stock buyback, shares	(300,000)		(300,000)
Share-based compensation	$ 18,638			18,638			18,638
Tax related to net share settlement	(278)			(278)			(278)
BALANCE at Dec. 31, 2017	$ 873,918	$ 33,727	$ (37,768)	386,338	532,687	(83,480)	831,504	42,414
Common stock shares ending at Dec. 31, 2017	49,130,090	50,587,000	(1,457,000)
Total comprehensive income	$ 87,040				104,021	(18,366)	85,655	1,385
Contributions from noncontrolling interests	4,902							4,902
Dividends to noncontrolling interest	(2,732)							(2,732)
Common stock issued for share-based plans	$ 4,861	$ 727		4,134			4,861
Common stock issued for share-based plans, shares		1,091,000
Stock buyback, shares	0
Share-based compensation	$ 20,736			20,736			20,736
Tax related to net share settlement	(11,293)			(11,293)			(11,293)
BALANCE at Dec. 31, 2018	$ 977,432	$ 34,454	$ (37,768)	$ 399,915	$ 636,708	$ (101,846)	$ 931,463	$ 45,969
Common stock shares ending at Dec. 31, 2018	50,221,035	51,678,000	(1,457,000)