CONDENSED 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, 2017	$ 873,918	$ 33,727	$ (37,768)	$ 386,338	$ 532,687	$ (83,480)	$ 831,504	$ 42,414
Common stock shares beginning at Dec. 31, 2017		50,587,000	(1,457,000)
Total comprehensive income	37,159				18,526	18,639	37,165	(6)
Dividends to noncontrolling interest	(1,152)							(1,152)
Common stock issued for share-based plans	868	$ 294		574			868
Common stock issued for share-based plans, shares		441,000
Share-based compensation	6,280			6,280			6,280
Tax related to net share settlement	(7,264)			(7,264)			(7,264)
BALANCE at Mar. 31, 2018	909,809	$ 34,021	$ (37,768)	385,928	551,213	(64,841)	868,553	41,256
Common stock shares ending at Mar. 31, 2018		51,028,000	(1,457,000)
BALANCE at Dec. 31, 2018	$ 977,432	$ 34,454	$ (37,768)	399,915	636,708	(101,846)	931,463	45,969
Common stock shares beginning at Dec. 31, 2018	50,221,035	51,678,000	(1,457,000)
Total comprehensive income	$ 26,734				31,716	(5,002)	26,714	20
Noncontrolling interests	2,755							2,755
Dividends to noncontrolling interest	(121)							(121)
Common stock issued for share-based plans	6,667	$ 250		6,417			6,667
Common stock issued for share-based plans, shares		376,000
Share-based compensation	4,476			4,476			4,476
Tax related to net share settlement	(645)			(645)			(645)
BALANCE at Mar. 31, 2019	$ 1,017,298	$ 34,704	$ (37,768)	$ 410,163	$ 668,424	$ (106,848)	$ 968,675	$ 48,623
Common stock shares ending at Mar. 31, 2019	50,596,756	52,054,000	(1,457,000)