Assets held for sale and discontinued operations - Summarized operating results for discontinued operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2013
Operating results
Revenue	$ 0	$ 0	$ 0	$ 0
Losses before tax, gain on sale and impairment	(53)	(467)	(243)	(1,202)
Impairment	0
Gain on sale	0
Losses before tax	(53)	(467)	(243)	(1,202)
Tax benefit	0	0	0	0
Net earnings/(losses) from discontinued operations	(53)	(467)	(243)	(1,202)
Ubud Hanging Gardens
Operating results
Revenue	0	0	0	0
Losses before tax, gain on sale and impairment	(42)	(241)	(192)	(918)
Impairment	0				$ (7,031)
Gain on sale	0
Losses before tax	(42)	(241)	(192)	(918)
Tax benefit	0
Net earnings/(losses) from discontinued operations	(42)	(241)	(192)	(918)
Porto Cupecoy
Operating results
Revenue	0	0	0	0
Losses before tax, gain on sale and impairment	(11)	(226)	(51)	(284)
Impairment	0
Gain on sale	0
Losses before tax	(11)	(226)	(51)	(284)
Tax benefit	0
Net earnings/(losses) from discontinued operations	$ (11)	$ (226)	$ (51)	$ (284)