DEBT (Details) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended			9 Months Ended						3 Months Ended	9 Months Ended			0 Months Ended	9 Months Ended				0 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Refinancing of Debt [Member]	Sep. 30, 2011 Refinancing of Debt [Member]	Sep. 30, 2012 Revolving Credit Facility [Member]	Sep. 30, 2012 Revolving Credit Facility [Member]	Feb. 09, 2012 Revolving Credit Facility [Member]	Sep. 30, 2012 Revolving Credit Facility [Member] Federal Funds Rate [Member]	Sep. 30, 2012 Revolving Credit Facility [Member] London Interbank Offered Rate (LIBOR) [Member]	Sep. 30, 2012 Revolving Credit Facility [Member] London Interbank Offered Rate (LIBOR) [Member] Minimum [Member]	Sep. 30, 2012 Revolving Credit Facility [Member] London Interbank Offered Rate (LIBOR) [Member] Maximum [Member]	Sep. 30, 2012 Revolving Credit Facility [Member] Base Rate [Member] Minimum [Member]	Sep. 30, 2012 Revolving Credit Facility [Member] Base Rate [Member] Maximum [Member]	Sep. 30, 2012 Letter of Credit [Member]	Sep. 30, 2012 United States Department of Housing and Urban Development [Member]	Sep. 30, 2012 United States Department of Housing and Urban Development [Member] note	Sep. 30, 2012 United States Department of Housing and Urban Development [Member] Subsequent Event [Member] Refinancing of Debt [Member] note	Sep. 30, 2012 Amended, Restated and Consolidated Loan Agreement with General Electric Capital Corporation [Member]	Oct. 27, 2010 Senior Notes due 2018 [Member]	Sep. 30, 2012 Senior Notes due 2018 [Member] Prior to November 2014 [Member]	Sep. 30, 2012 Senior Notes due 2018 [Member] Prior to November 2013 [Member]	Sep. 30, 2012 Senior Notes due 2018 [Member] Maximum [Member] Prior to November 2013 [Member]	Dec. 06, 2010 Senior Subordinated Notes due 2015 [Member]	Jul. 26, 2012 Additional Senior Notes [Member] Issuance of Debt [Member]	Oct. 15, 2012 Additional Senior Notes [Member] Subsequent Event [Member] Issuance of Debt [Member]	Sep. 30, 2012 Mortgage Indebtedness [Member]		Dec. 31, 2011 Mortgage Indebtedness [Member]
Debt Instrument [Line Items]
Principal Outstaning, Fixed Rate																					$ 30,900,000								$ 99,251,000		$ 99,239,000
Weighted Average Interest Rate, Fixed Rate																					6.82%								5.04%
Principal Outstaning, Variable Rate																													58,262,000	[1]	59,159,000	[1]
Weighted Average Interest Rate, Variable Rate																													5.00%	[1]
Total Principal Outstanding																													157,513,000		158,398,000
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		500,000
Debt Instrument, Refianced, Number of Instruments Refianced																			4	1
Debt Instrument, Refianced, Amount																			20,900,000	13,500,000
Debt Instrument, Interest Rate During Period																			5.75%	5.90%
Debt Instrument, Refianced, Interest Rate																			2.49%	2.49%
Debt Instrument, Refianced, Increase (Decrease) to Outstanding Principal																			1,100,000	400,000
Long-term Debt, Amended, Percentage Bearing Variable Interest, Amount																					58,300,000
Long-term Debt, Amended, Percentage Bearing Variable Interest, Basis Spread on Variable Rate																					0.50%
Debt Instrument, Refianced, Write-off of Unamortized Financing Costs																		500,000	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
Proceeds from Issuance of Debt																						225,000,000					103,000,000
Proceeds from Debt, Net of Issuance Costs																						219,900,000
Debt Instrument, Repurchased Face Amount																										200,000,000
Debt Instrument, Percent to Par Value																											106.00%
Debt Instrument, Interest Rate, Effective Percentage																											6.92%
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								200,000,000	200,000,000	100,000,000							20,000,000
Line of Credit Facility, Accordion Feature, Additional Borrowing Capacity								150,000,000	150,000,000
Line of Credit Facility, Accordion Feature, Increased Borrowing Capacity								230,000,000	230,000,000
Line of Credit Facility, Optional Extension Period									1 year
Line of Credit Facility, Amount Outstanding								0	0
Line of Credit Facility, Current Borrowing Capacity								201,600,000	201,600,000
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								3.46%	3.46%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage													0.35%	0.50%
Interest Expense	9,538,000	7,624,000	25,384,000	22,726,000				100,000	300,000
Line of Credit Facility, Commitment Fee Amount								200,000	700,000
Amortization of deferred financing costs	1,200,000	500,000	2,620,000	1,507,000		500,000	700,000
Interest Payable	$ 11,700,000		$ 11,700,000		$ 4,000,000

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