Other Current Liabilities and Other Liabilities (Details) (USD $)	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2014	Jan. 31, 2013
Other Current Liabilities
Property, sales and use taxes payable	$ 14,490,000	$ 14,482,000
Income tax payable	295,000
Accrued interest	3,289,000	3,078,000
Advance deposits	10,742,000	8,259,000
Management fees payable	3,467,000	1,077,000
Other	4,183,000	3,392,000
Other Current Liabilities	36,466,000	30,288,000
Other Liabilities
Deferred gain on sale of asset	7,000,000	14,000,000
Interest rate swap derivative agreement		1,066,000
Accrued income tax	1,541,000	1,491,000
Deferred revenue	6,790,000	6,918,000
Deferred rent	15,075,000	12,270,000
Deferred incentive management fees	534,000	1,714,000
Other	2,667,000	2,499,000
Other Liabilities	33,607,000	39,958,000
Other Current Liabilities and Other Liabilities
Gain (loss) on sale	5,199,000	51,620,000	38,292,000
Unrecognized tax benefits		1,500,000
Interest expense incurred on unrecognized tax benefit	50,000	600,000
Rochester Portfolio
Other Liabilities
Deferred gain on sale of asset					3,700,000
Other Current Liabilities and Other Liabilities
Portfolio's pension plan liability					14,000,000
Gain (loss) on sale				7,000,000	51,600,000
Retirement plans | Rochester Portfolio
Other Liabilities
Deferred gain on sale of asset	7,000,000				14,000,000
Other Current Liabilities and Other Liabilities
Portfolio's pension plan liability	7,000,000	14,000,000			14,000,000
Reduction in pension plan liability				$ 7,000,000