Litigation (Narrative) (Details) - USD ($) $ in Millions	Aug. 05, 2015	Nov. 19, 2014	Sep. 14, 2010
Commitments and Contingencies Disclosure [Abstract]
Alleged tax deficiency	$ 2.1	$ 6.1	$ 13.3

Estimated amount of loss resulting from an adverse tax position.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)(3)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

Name:	us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration