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Significant Accounting Policies (Details) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2013
Accounting Policies [Line Items]
Gain (Loss) on Sale of Notes Receivable	$ 8,400,000
Current Income Tax Expense (Benefit)				0
Significant Accounting Policies (Textual) [Abstract]
Notes receivable		18,318,000		18,318,000			83,033,000
Note maturity public capital threshold				5,000,000
Note receivable interest income		444,000	1,100,000	2,985,000	3,100,000
Net of a valuation allowance		1,433,000		1,433,000
Tax benefit/(expense), net		(2,492,000)	(2,658,000)	(8,011,000)	(7,314,000)
Recognition and evaluation of tax position, whether a tax position is more likely		not (greater than 50 percent probability)
Unrecognized tax benefit, accrued interest or penalties due to examination		0		0
Proceeds from Sale and Collection of Notes Receivable				64,715,000	(2,680,000)
Interest Income, Related Party				184,000		547,000
Note Due March 2014 Related Party [Domain]
Significant Accounting Policies (Textual) [Abstract]
Basis spread on variable rate		35000.00%		35000.00%
Note due October 2014 - related party [Member]
Significant Accounting Policies (Textual) [Abstract]
Notes receivable		0		0			40,800,000
Notes receivable interest rate				0.00%
Note due February 2017 [Member]
Significant Accounting Policies (Textual) [Abstract]
Notes receivable		15,818,000		15,818,000			14,580,000
Notes receivable interest rate				10.00%
Issuance of notes receivable		1,238,000
Note due June 2022 [Member]
Significant Accounting Policies (Textual) [Abstract]
Notes receivable		0		0			26,253,000
Notes receivable interest rate				0.00%
Note receivable, unamortized discount		0		0			247,000
Loan amount		26,500,000		26,500,000
Discount rate on note receivable				7.25%
Proceeds from Sale and Collection of Notes Receivable	36,000,000
Other [Member]
Significant Accounting Policies (Textual) [Abstract]
Notes receivable		2,500,000		2,500,000			1,400,000
Notes receivable interest rate				8.00%
Issuance of notes receivable				1,100,000
Aggregate Commitment on Note Receivable		2,500,000		2,500,000
RedeemableNoncontrollingInterest [Member]
Accounting Policies [Line Items]
Comprehensive (loss)/income attributable to non-controlling interests		57,000	45,000	163,000		196,000
Unconsolidated Joint Venture Two Stoughton Massachusetts [Member]
Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage							95.00%
Significant Accounting Policies (Textual) [Abstract]
Joint Venture Number of Operating Communities Owned		1		1
Bridge Loan		$ 40,800,000		$ 40,800,000
Number of extension options on loan				2
Extension period of option on loan				3 months

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Aggregate Commitment on Note Receivable

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Extension period of option on loan

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Joint Venture Number Of Operating Communities Owned.

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Short-Term financing which is expected to be paid back relatively quickly, such as by a subsequent longer-term loan. Also called swing loan or bridge financing.

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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reflects the net positive or negative amount derived from subtracting from net proceeds of sale the carrying amounts, net of allocated reserves, of notes receivable transferred to a third party in a transaction that qualifies for sales treatment.

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The likelihood that the uncertain tax position will not be sustained as a result of the examination by the taxing authority.

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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of interest income earned from interest-bearing assets owed to the entity by related party.

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The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin.

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Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

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Amount after tax of other comprehensive income (loss) attributable to noncontrolling interests.

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Includes all other interest income, net of discount accretion and premium amortization, and dividend income. It may include dividend income from equity securities that do not have readily determinable fair values that are reportable in Other Assets, and interest income on interest-only strips receivable (not in the form of a security) that are included in Other Assets.

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The cash outflow to acquire an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among myriad other features and characteristics.

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The cash inflow associated with the proceeds from sale of notes receivable, as well as principal collections from a borrowing supported by a written promise to pay an obligation (note receivable).

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Disclosure of the unamortized amount of the discount on the note or receivable which is deducted from the face amount of the receivable or loan. The discount or premium is the difference between the present value and the face amount.

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Yield on the receivable, on which interest has been imputed, as calculated from its issuance value or purchase price. The calculated effective interest rate considers factors such as the issued face value or price paid for the receivable, the time period between payments, and the time until maturity [full receipt] of the receivable.

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The principal amount of the receivable or note before consideration of the discount or premium.

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