SUBSEQUENT EVENT (Details) (Subsequent event, Sale-leaseback agreement for North Bergen, New Jersey office, USD $) In Millions, unless otherwise specified	0 Months Ended
	Apr. 24, 2013 item
Subsequent event | Sale-leaseback agreement for North Bergen, New Jersey office
SUBSEQUENT EVENTS
Sale price of facility	$ 9.3
Lease term	12 years
Number of renewal options under sale-leaseback transaction	2
Term of options under sale-leaseback transaction	5 years