FAIR VALUE MEASUREMENTS - Fair value on a nonrecurring basis (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Other Fair Value Measurement Disclosures
Current Maturities of Corporate Borrowings	$ 10,195,000	$ 15,873,000
Corporate borrowings	1,924,366,000	1,775,132,000
Nonrecurring basis
Other Fair Value Measurement Disclosures
Property owned, net	863,000	3,149,000
Favorable lease	839,000
Total losses	2,480,000	2,342,000
Significant other observable inputs (Level 2)
Other Fair Value Measurement Disclosures
Current Maturities of Corporate Borrowings	8,811,000	14,390,000
Corporate Borrowings	1,924,837,000	1,765,678,000
Significant unobservable inputs (Level 3)
Other Fair Value Measurement Disclosures
Current Maturities of Corporate Borrowings	1,389,000	1,389,000
Corporate Borrowings	4,166,000	5,555,000
Significant unobservable inputs (Level 3) | Nonrecurring basis
Other Fair Value Measurement Disclosures
Property owned, net	2,480,000	2,342,000
Total Carrying Value | Nonrecurring basis
Other Fair Value Measurement Disclosures
Property owned, net	$ 2,480,000	$ 2,342,000