SUBSEQUENT EVENTS Share Repurchase Authorization (Details) (Subsequent Event [Member], June 2012 Share Repurchase Program [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
Jun. 30, 2012
Subsequent Event [Member] \| June 2012 Share Repurchase Program [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount	$ 250.0
Stock Repurchase Program, Period in Force	24 months

Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_StockRepurchaseProgramPeriodInForce1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration