Held for Sale (Assets and Liabilities of Properties Held for Sale) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets Held for Sale:
Assets held for sale	$ 106,548	$ 0
Liabilities Held for Sale:
Liabilities held for sale	751	$ 0
Radisson Hotel
Assets Held for Sale:
Prepaid expenses	150
Goodwill and other intangible assets	10
Assets held for sale	106,548
Liabilities Held for Sale:
Other accrued expenses	74
Other liabilities	677
Liabilities held for sale	751
Radisson Hotel | Real Estate
Assets Held for Sale:
Real estate, net of accumulated depreciation of $32,945	105,987
Oil and gas properties and equipment, net of accumulated depletion of $1,162	105,987
Liabilities Held for Sale:
Accumulated depletion, held-for-sale properties	32,945
Radisson Hotel | Oil and Gas Properties
Assets Held for Sale:
Real estate, net of accumulated depreciation of $32,945	401
Oil and gas properties and equipment, net of accumulated depletion of $1,162	401
Liabilities Held for Sale:
Accumulated depletion, held-for-sale properties	$ 1,162