OTHER ASSETS (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
OTHER ASSETS
Security deposits, net	$ 7,291,000	$ 5,019,000
Debt issuance costs, net	6,687,000	4,260,000
Maintenance agreements, non-current portion	1,465,000	1,614,000
Restricted cash	1,620,000	158,000
Other	517,000	623,000
Total	17,580,000	11,674,000
Debt issuance costs	3,200,000	4,300,000
Standby letter of credit	$ 1,500,000