Commitments and Contingencies (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other expenses
Rent expense	$ 5,082,000	$ 4,689,000	$ 14,631,000	$ 13,957,000
Operating leases
Remainder of 2013	4,644,000		4,644,000
2014	18,902,000		18,902,000
2015	19,258,000		19,258,000
2016	18,942,000		18,942,000
2017	17,503,000		17,503,000
Thereafter	80,893,000		80,893,000
Total	160,142,000		160,142,000
Construction Contracts
Remainder of 2013	75,808,000		75,808,000
2014	429,000		429,000
Total	76,237,000		76,237,000
Other
Remainder of 2013	1,441,000		1,441,000
2014	1,536,000		1,536,000
2015	1,071,000		1,071,000
2016	564,000		564,000
2017	176,000		176,000
Thereafter	1,484,000		1,484,000
Total	6,272,000		6,272,000
Total
Remainder of 2013	83,394,000		83,394,000
2014	83,063,000		83,063,000
2015	22,682,000		22,682,000
2016	21,859,000		21,859,000
2017	125,679,000		125,679,000
Thereafter	82,377,000		82,377,000
Total	419,054,000		419,054,000
Contractual obligations
Remainder of 2013	375,000		375,000
2014	58,250,000		58,250,000
2017	108,000,000		108,000,000
Total	166,625,000		166,625,000
Credit Facility
Contractual obligations
Remainder of 2013	588,000		588,000
2014	2,353,000		2,353,000
2015	2,353,000		2,353,000
2016	2,353,000		2,353,000
2017	108,000,000		108,000,000
Total	115,647,000		115,647,000
Mortgages payable
Contractual obligations
Remainder of 2013	913,000		913,000
2014	59,843,000		59,843,000
Total	60,756,000		60,756,000
Principal payments	58,600,000		58,600,000
Estimated interest payments in 2013			500,000
Estimated interest payments in 2014			$ 1,600,000