Basis of Presentation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2015	Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Income tax expense decrease resulting from state tax legislation	$ 11.4	$ 11.5
Deferred tax assets, net, increase resulting from state tax legislation	4.2	$ 11.5
Deferred tax asset valuation allowance	$ 7.2

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant