Other intangible assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of finite-lived intangible assets

Other intangible assets consist of the following as of December 31, 2018 and 2017:

	Favorable lease assets		Internet sites		Trade names		Software		Total
	$'000		$'000		$'000		$'000		$'000
Carrying amount:
Balance at January 1, 2017	8,501		1,658		7,579		—		17,738
Additions	—		—		6,100		—		6,100
Disposals	—		(247	)	—		—		(247	)
Foreign currency translation adjustment	59		168		322		—		549
Balance at December 31, 2017	8,560		1,579		14,001		—		24,140
Additions	—		1,858		2,676		6,230		10,764
Impairment	(468	)	—		—		—		(468	)
Disposals	—		(754	)	—		—		(754	)
Foreign currency translation adjustment	(264	)	(175	)	(1,660	)	(281	)	(2,380	)
Balance at December 31, 2018	7,828		2,508		15,017		5,949		31,302
Accumulated amortization:
Balance at January 1, 2017	2,636		1,225				—		3,861
Charge for the year	434		166				—		600
Disposals	—		(247	)			—		(247	)
Foreign currency translation adjustment	22		126				—		148
Balance at December 31, 2017	3,092		1,270				—		4,362
Charge for the year	347		258				481		1,086
Disposals	—		(754	)			—		(754	)
Impairment	(312	)	—				—		(312	)
Foreign currency translation adjustment	(115	)	(84	)			(22	)	(221	)
Balance at December 31, 2018	3,012		690				459		4,161
Net book value:
December 31, 2016	5,865		433		7,579		—		13,877
December 31, 2017	5,468		309		14,001		—		19,778
December 31, 2018	4,816		1,818		15,017		5,490		27,141