Income Taxes (Details) (USD $)	3 Months Ended
Jun. 30, 2011	Mar. 31, 2011
Income Taxes [Abstract]
Income tax benefit from continuing operations		$ 4,200,000
Reversal of unrecognized tax benefits previously established for 2004 through 2006 tax years		2,800,000
Interest related to reversal of unrecognized tax benefits previously established for 2004 through 2006 tax years		600,000
Unrecognized Tax Positions, Increase (Decrease)	$ 3,600,000

The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph a(3)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

Name:	us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration