DEBT (Details) (USD $) In Millions, unless otherwise specified		12 Months Ended
	Aug. 31, 2011 Line of credit	Dec. 31, 2012 Line of credit Base (prime) rate	Dec. 31, 2012 Line of credit London Interbank Offered Rates	Dec. 31, 2012 Capital lease obligations M	Dec. 31, 2011 Capital lease obligations	Dec. 31, 2010 Capital lease obligations	Dec. 31, 2012 Capital lease obligations Assets acquired under capital leases	Dec. 31, 2011 Capital lease obligations Assets acquired under capital leases
DEBT
Maximum borrowing capacity	$ 10
Effective interest rate on borrowing		Base (prime) rate	London Interbank Offered Rates up to 180 days
Percentage to be subtracted to compute the variable rate on the debt instrument		1.50%
Percentage that needs to be added to compute the variable rate on the debt instrument			1.75%
Company debt consisting of capital leases				0.5	1.1
Period over which monthly installments are payable				12
Assets acquired under capital leases
Net book value							3.2	3.6
Accumulated depreciation							2.5	2.1
Interest expenses for capital lease obligations				$ 0.05	$ 0.05	$ 0.01