HEADQUARTERS RELOCATION (Details) (USD $)	12 Months Ended			9 Months Ended
	Dec. 31, 2011	Sep. 30, 2012	Dec. 31, 2011 Lease Termination [Member]	Sep. 30, 2012 Cooperative Endeavor Agreement [Member] Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Cost of reimbursement expense				$ 8,100,000
Relocation expenses	3,900,000
Increase in property and equipment facility improvements and replacement equipment in connection with relocation	1,300,000
Reimbursement for lease and other expense per year through 2019			352,000,000
Reimbursements for capital expenditures recorded as deferred costs		$ 1,700,000