Other intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Finite Lived Intangible Assets
Intangible asset additions			$ 706	$ 0
Amortization expense	$ 128	$ 124	222	$ 192
Estimated amortization expense, remainder of 2015	222		222
Estimated amortization expense, year ending December 31, 2016	444		444
Estimated amortization expense, year ending December 31, 2017	444		444
Estimated amortization expense, year ending December 31, 2018	444		444
Estimated amortization expense, year ending December 31, 2019	444		444
Estimated amortization expense, year ending December 31, 2020	$ 444		444
Favorable lease assets
Finite Lived Intangible Assets
Intangible asset additions			706
Amortization expense			$ 157
Favorable lease assets | Minimum
Finite Lived Intangible Assets
Amortization period (in years)			19 years
Favorable lease assets | Maximum
Finite Lived Intangible Assets
Amortization period (in years)			60 years
Internet sites
Finite Lived Intangible Assets
Intangible asset additions			$ 0
Amortization expense			$ 65
Internet sites | Minimum
Finite Lived Intangible Assets
Amortization period (in years)			5 years
Internet sites | Maximum
Finite Lived Intangible Assets
Amortization period (in years)			10 years
Grand Hotel Timeo and Villa Sant'Andrea | Favorable lease assets
Finite Lived Intangible Assets
Intangible asset additions			$ 706