Commitments and Contingencies (Details) (USD $)	0 Months Ended	6 Months Ended
	Mar. 29, 2011	Jun. 30, 2013 item	Dec. 31, 2012
Commitments and Contingencies
Debt issued	$ 2,500,000
Real property assessed value exceeding threshold limit		1,000,000
Real property value at which debt obligation is terminated		225,000,000
Number of parking spaces required to be constructed		720
Minimum number of garages required to be constructed		2
Book value of real estate land		238,743,000	251,551,000
Percentage of net sales proceeds to be deposited into escrow account		33.00%
Limit up to which sales proceeds will be transferred to escrow accounts		7,000,000
Escrow		0
BHFS I, LLC (Land)
Commitments and Contingencies
Book value of real estate land		28,200,000
Chase Park Plaza Hotel LLC
Commitments and Contingencies
Ownership interest (as a percent)		95.00%
Bonds
Commitments and Contingencies
Real property assessed value threshold		125,000,000
Percentage of reduction in bond obligation for an amount exceeding threshold limit		0.50%
Real property value at which debt obligation is terminated		225,000,000
Outstanding debt obligation		5,700,000
Assessed value of annual debt service		491,000
Amount expensed		100,000
Bonds | City of Frisco
Commitments and Contingencies
Debt issued		$ 12,500,000