FAIR VALUE DISCLOSURES (Assets and Liabilities Measured on a Recurring and Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Fair Value, Measurements, Recurring | Total
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Contingent Consideration	$ 1,300
Loans Receivable	12,826
Fair Value, Measurements, Recurring | Level 1
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Contingent Consideration	0
Loans Receivable	0
Fair Value, Measurements, Recurring | Level 2
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Contingent Consideration	0
Loans Receivable	0
Fair Value, Measurements, Recurring | Level 3
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Contingent Consideration	1,300
Loans Receivable	12,826
Fair Value, Measurements, Nonrecurring | Total
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Real estate investment, gross	2,208
Fair Value, Measurements, Nonrecurring | Level 1
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Real estate investment, gross	0
Fair Value, Measurements, Nonrecurring | Level 2
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Real estate investment, gross	2,208
Fair Value, Measurements, Nonrecurring | Level 3
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Real estate investment, gross	0
Senior Notes | Fair Value, Measurements, Recurring | Total
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	345,313
Senior Notes | Fair Value, Measurements, Recurring | Level 1
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	0
Senior Notes | Fair Value, Measurements, Recurring | Level 2
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	345,313
Senior Notes | Fair Value, Measurements, Recurring | Level 3
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	0
Mortgage indebtedness | Fair Value, Measurements, Recurring | Total
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	152,559
Mortgage indebtedness | Fair Value, Measurements, Recurring | Level 1
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	0
Mortgage indebtedness | Fair Value, Measurements, Recurring | Level 2
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	0
Mortgage indebtedness | Fair Value, Measurements, Recurring | Level 3
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	152,559
Revolving Credit Facility | Fair Value, Measurements, Recurring | Total
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	92,500
Revolving Credit Facility | Fair Value, Measurements, Recurring | Level 1
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	0
Revolving Credit Facility | Fair Value, Measurements, Recurring | Level 2
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	0
Revolving Credit Facility | Fair Value, Measurements, Recurring | Level 3
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	92,500	[1]
Carrying Amount
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans Receivable	12,017		0
Carrying Amount | Senior Notes
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	330,666	[1]	225,000	[1]
Carrying Amount | Mortgage indebtedness
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities	152,322	[1]	153,942	[1]
Carrying Amount | Revolving Credit Facility
Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial liabilities			$ 0	[1]

[1] Carrying amounts represent the book value of financial instruments and include unamortized premiums (discounts).