DEBT (Details) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended			6 Months Ended						6 Months Ended			0 Months Ended	6 Months Ended					0 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2012 Refinancing of Debt [Member]	Jun. 30, 2011 Refinancing of Debt [Member]	Jun. 30, 2012 Revolving Credit Facility [Member]	Jun. 30, 2012 Revolving Credit Facility [Member]	Feb. 09, 2012 Revolving Credit Facility [Member]	Jun. 30, 2012 Revolving Credit Facility [Member] Federal Funds Rate [Member]	Jun. 30, 2012 Revolving Credit Facility [Member] London Interbank Offered Rate (LIBOR) [Member]	Jun. 30, 2012 Revolving Credit Facility [Member] London Interbank Offered Rate (LIBOR) [Member] Minimum [Member]	Jun. 30, 2012 Revolving Credit Facility [Member] London Interbank Offered Rate (LIBOR) [Member] Maximum [Member]	Jun. 30, 2012 Revolving Credit Facility [Member] Base Rate [Member] Minimum [Member]	Jun. 30, 2012 Revolving Credit Facility [Member] Base Rate [Member] Maximum [Member]	Jun. 30, 2012 Letter of Credit [Member]	Jun. 30, 2012 United States Department of Housing and Urban Development [Member] note	Jun. 30, 2012 United States Department of Housing and Urban Development [Member] Subsequent Event [Member] Refinancing of Debt [Member] note	Jun. 30, 2012 Amended, Restated and Consolidated Loan Agreement with General Electric Capital Corporation [Member]	Oct. 27, 2010 Senior Notes due 2018 [Member]	Jun. 30, 2012 Senior Notes due 2018 [Member] Prior to November 2014 [Member]	Jun. 30, 2012 Senior Notes due 2018 [Member] Prior to November 2013 [Member]	Jun. 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]	Jul. 26, 2012 Additional Senior Notes [Member] Subsequent Event [Member] Issuance of Debt [Member]	Jun. 30, 2012 Mortgage Indebtedness [Member]		Dec. 31, 2011 Mortgage Indebtedness [Member]
Debt Instrument [Line Items]
Principal Outstaning, Fixed Rate																				$ 31,100,000								$ 98,818,000	[1]	$ 98,739,000	[1]
Weighted Average Interest Rate, Fixed Rate																				6.82%								5.56%
Principal Outstaning, Variable Rate																												58,562,000	[1],[2]	59,159,000	[1],[2]
Weighted Average Interest Rate, Variable Rate																												5.00%	[2]
Total Principal Outstanding																												157,380,000	[1]	157,898,000	[1]
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																				58,600,000
Long-term Debt, Amended, Percentage Bearing Variable Interest, Basis Spread on Variable Rate																				0.50%
Debt Instrument, Refianced, Write-off of Unamortized Financing Costs																		200,000
Debt Instrument, Interest Rate, Stated Percentage																					8.125%				9.125%	8.125%	8.125%
Debt Instrument, Face Amount																					225,000,000					100,000,000	100,000,000
Proceeds from Issuance of Debt																					225,000,000						103,800,000
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, Optional Extension Period									1 year
Line of Credit Facility, Amount Outstanding								42,500,000	42,500,000
Line of Credit Facility, Current Borrowing Capacity								157,500,000	157,500,000
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								3.49%	3.49%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage													0.35%	0.50%
Interest Expense	8,148,000	7,505,000	15,846,000	15,103,000				200,000	200,000
Line of Credit Facility, Commitment Fee Amount								200,000	400,000
Amortization of deferred financing costs	900,000	500,000	1,447,000	995,000		200,000	200,000
Interest Payable	$ 3,700,000		$ 3,700,000		$ 4,000,000

[1] Outstanding principal balance for mortgage indebtedness does not include mortgage premium of $0.5 million as of June 30, 2012 and December 31, 2011.

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