FINANCIAL INSTRUMENTS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified			3 Months Ended	9 Months Ended
Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Auction rate securities	Sep. 30, 2014 Auction rate securities
Schedule of Available-for-sale Securities [Line Items]
Accumulated other comprehensive income, net unrealized gains (losses) on investments, before tax	$ (0.5)	$ 1.6
Securities redeemed, par value			8.0
Unrealized gains related to the recovery of unrealized losses recorded in previous quarter				$ 0.6

Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration