TREASURY STOCK (Additional Information) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	0 Months Ended
Mar. 31, 2013	Oct. 23, 2012 Repurchase of Equity
Accelerated Share Repurchases [Line Items]
Stock repurchase program, authorized amount		$ 75.0
Amount available for share repurchase under this latest authorization	$ 75.0

The remaining repurchase amount authorized by an entity's Board of Directors under a stock repurchase plan.

No definition available.

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