FAIR VALUE MEASUREMENTS - Summary of fair value hierarchy for financial assets (cash equivalents and investments in marketable securities) measured at fair value on recurring basis - (Parentheticals) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Fair Value Disclosures [Abstract]
Cash and cash equivalents	$ 23.6	$ 20.6
Settlement amount of accrued contingent consideration	$ 5.0