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	46,033				43,593	1,847	45,440	593
Dividends to noncontrolling interest	(2,607)							(2,607)
Common stock issued for share-based plans	3,009	$ 477		2,532			3,009
Common stock issued for share-based plans, shares		716,000
Share-based compensation	11,079			11,079			11,079
Tax related to net share settlement	(8,617)			(8,617)			(8,617)
BALANCE at Jun. 30, 2018	922,815	$ 34,204	$ (37,768)	391,332	576,280	(81,633)	882,415	40,400
Common stock shares ending at Jun. 30, 2018		51,303,000	(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	$ 58,060				68,000	(10,379)	57,621	439
Noncontrolling interests	3,343							3,343
Dividends to noncontrolling interest	(2,568)							(2,568)
Common stock issued for share-based plans	6,705	$ 349		6,356			6,705
Common stock issued for share-based plans, shares		524,000
Share-based compensation	9,775			9,775			9,775
Tax related to net share settlement	(1,595)			(1,595)			(1,595)
BALANCE at Jun. 30, 2019	$ 1,051,152	$ 34,803	$ (37,768)	$ 414,451	$ 704,708	$ (112,225)	$ 1,003,969	$ 47,183
Common stock shares ending at Jun. 30, 2019	50,744,888	52,202,000	(1,457,000)