DEBT (Details) (USD $)	1 Months Ended	3 Months Ended			12 Months Ended							12 Months Ended						12 Months Ended				0 Months Ended	12 Months Ended			0 Months Ended			12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Revolving Credit Facility	Sep. 20, 2012 Revolving Credit Facility	Feb. 09, 2012 Revolving Credit Facility	Feb. 10, 2012 Revolving Credit Facility Subsequent Event Refinancing of Debt	Dec. 31, 2012 Revolving Credit Facility Federal Funds Rate	Dec. 31, 2012 Revolving Credit Facility London Interbank Offered Rate (LIBOR)	Dec. 31, 2012 Revolving Credit Facility London Interbank Offered Rate (LIBOR) Minimum	Dec. 31, 2012 Revolving Credit Facility London Interbank Offered Rate (LIBOR) Maximum	Dec. 31, 2012 Revolving Credit Facility Base Rate Minimum	Dec. 31, 2012 Revolving Credit Facility Base Rate Maximum	Feb. 10, 2012 Letter of Credit Subsequent Event Refinancing of Debt	Dec. 31, 2012 United States Department of Housing and Urban Development [Member] note	Dec. 31, 2012 United States Department of Housing and Urban Development [Member] Refinancing of Debt note	Dec. 31, 2012 United States Department of Housing and Urban Development [Member] Refinance of Debt Q4 [Member] note	Dec. 31, 2012 Amended, Restated and Consolidated Loan Agreement with General Electric Capital Corporation [Member]	Oct. 27, 2010 Senior Notes due 2018	Dec. 31, 2012 Senior Notes due 2018 Prior to November 2014	Dec. 31, 2012 Senior Notes due 2018 Prior to November 2013	Dec. 31, 2012 Senior Notes due 2018 Prior to November 2013 Maximum	Jul. 26, 2012 Additional Senior Notes [Member] Issuance of Debt	Nov. 24, 2012 Additional Senior Notes [Member] Subsequent Event Issuance of Debt	Dec. 06, 2010 Senior Subordinated Notes due 2015	Dec. 31, 2012 Mortgage Indebtedness		Dec. 31, 2011 Mortgage Indebtedness		Dec. 31, 2012 Senior Notes		Dec. 31, 2011 Senior Notes
Debt Instrument
Principal Outstanding, Fixed Rate																					$ 30,700,000								$ 94,373,000		$ 94,783,000
Weighted Average Interest Rate, Fixed Rate																					6.82%								4.43%
Principal Outstanding, Variable Rate																													57,949,000	[1]	59,159,000	[1]
Weighted Average Interest Rate, Variable Rate																													5.00%	[1]
Total Principal Outstanding																													152,322,000		153,942,000
Debt Instrument, Description of Variable Rate Basis												one-month LIBOR																	90-day LIBOR
Debt Instrument, Basis Spread on Variable Rate											0.50%	1.00%																	4.00%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum																													1.00%
Debt Instrument, Unamortized Premium																															500,000		5,700,000
Debt Instrument, Interest Rate, Stated Percentage																						8.125%						9.125%
Debt Instrument, Face Amount																						225,000,000				100,000,000	100,000,000						325,000,000	[2]	225,000,000	[2]
Debt Instrument, Percent to Par Value																										106.00%
Proceeds from Issuance of Debt																						225,000,000				103,000,000
Debt Instrument, Interest Rate, Effective Percentage																										6.92%
Proceeds from Debt, Net of Issuance Costs																						219,900,000
Debt Instrument, Repurchased Face Amount																												200,000,000
Debt Instrument, Redeemable, Redemption Price of Principal Amount, Percentage																							100.00%	108.125%
Debt Instrument, Redeemable, Principal Amount Redeemable, Percentage																									35.00%
Line of Credit Facility, Maximum Borrowing Capacity							109,100,000		100,000,000	200,000,000							20,000,000
Line of Credit Facility, Commitment Fee Amount							900,000
Line of Credit Facility, Accordion Feature, Additional Borrowing Capacity										150,000,000
Line of Credit Facility, Accordion Feature, Increased Borrowing Capacity								230,000,000
Line of Credit Facility, Optional Extension Period							1 year
Secured revolving credit facility		92,500,000			92,500,000	0
Line of Credit Facility, Interest Rate During Period													3.00%	4.00%	2.00%	3.00%
Line of Credit Facility, Interest Rate at Period End							3.71%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage													0.35%	0.50%
Interest Expense	3,859,000				37,005,000	30,319,000	500,000
Amortization of deferred financing costs	230,000				3,800,000	1,998,000
Interest Payable		5,400,000			5,400,000	4,000,000
Debt Instrument, Refinanced, Number of Instruments Refinanced																		4	1	1
Debt Instrument, Refianced, Amount																		20,900,000	13,500,000	20,200,000
Debt Instrument, Interest Rate During Period																		5.75%	5.90%	5.20%
Debt Instrument, Refianced, Interest Rate																		2.49%	2.49%	2.43%
Debt Instrument, Refianced, Increase (Decrease) to Outstanding Principal																		1,100,000	400,000	600,000
Debt Instrument, Refianced, Write-off of Unamortized Financing Costs																		900,000
Payments of Debt Extinguishment Costs			100,000	500,000	2,000,000
Debt Extinguishment Out of Perdod Adjustment		600,000
Long-term Debt, Amended, Percentage Bearing Variable Interest, Amount																					$ 57,900,000

[1] Contractual interest rates under variable rate mortgages are equal to the 90-day LIBOR plus 4.0% (subject to a 1.0% floor).

[2] Face value represents amounts contractually due under the terms of the respective agreements.