COMMITMENTS, CONTINGENCIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Future minimum annual fixed rentals
2013	$ 23,938,000
2014	22,985,000
2015	21,564,000
2016	18,432,000
2017	15,652,000
Thereafter	121,939,000
Total	224,510,000
Rent expense charged to costs and expenses	23,500,000	23,600,000	23,200,000
Third Party
Future minimum annual fixed rentals
2013	16,922,000
2014	16,428,000
2015	15,570,000
2016	14,497,000
2017	13,785,000
Thereafter	104,757,000
Total	181,959,000
Related Party
Future minimum annual fixed rentals
2013	7,016,000
2014	6,557,000
2015	5,994,000
2016	3,935,000
2017	1,867,000
Thereafter	17,182,000
Total	$ 42,551,000