Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure Of Fair Value Measurement Of Assets Liabilities [Abstract]

Fair Value of Assets (Liabilities)

Fair value information:
As of December 31, 2018	Fair value measurement using
	Total			Quoted  prices in active markets (Level 1)		Significant observable inputs (Level 2)			Significant unobservable inputs (Level 3)
	US$’000			US$’000		US$’000			US$’000
Financial assets (liabilities) - derivatives (Note 11.(a))
Foreign exchange forward contract		(142	)		—		(142	)		—
Financial assets at fair value through other comprehensive income (Note 11.(a))
Unquoted equity instrument
Thai Metal Processing Co., Ltd.		2,332			—		—			2,332
Assets for which fair values are disclosed:
Investment properties (Note 17)
Land		10,656			—		—			10,656
Office buildings		1,397			—		—			1,397

Fair value information:
As of December 31, 2017	Fair value measurement using
	Total			Quoted  prices in active markets (Level 1)		Significant observable inputs (Level 2)			Significant unobservable inputs (Level 3)
	US$’000			US$’000		US$’000			US$’000
Financial assets (liabilities) - derivatives (Note 11.(a))
Foreign exchange forward contract		(139	)		—		(139	)		—
Available-for-sale financial assets (Note 11.(a))
Unquoted equity instrument
Thai Metal Processing Co., Ltd.		2,747			—		—			2,747
Assets for which fair values are disclosed:
Investment properties (Note 17)
Land		9,548			—		—			9,548
Office buildings		1,303			—		—			1,303