Common, Treasury and Preferred Shares (Shareholder Rights Plan) (Details) (Shareholders Rights Plan [Member])	Jan. 31, 1999
Class of Warrant or Right [Line Items]
Purchase price per right	40
Common shares percentage acquired	15.00%
Asset sale percentage	50.00%
Class B Series I Cumulative Preferred Shares [Member]
Class of Warrant or Right [Line Items]
Portion of preferred share per right	0.001
Board Of Directors [Member]
Class of Warrant or Right [Line Items]
Purchase price per right	0.01

Exercise price per share or per unit of warrants or rights outstanding.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(4))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 4

-Article 4

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant