Property and equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Less: Accumulated depreciation	$ (44,217)	$ (37,638)
Total property and equipment, net	65,494	66,699
Gaming Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	94,545	89,361
Other Property and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 15,166	$ 14,976