Accounting Policies Accounting Policies (Line of Credit) (Details) (Revolving Credit Facility [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2012
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Deferred debt issuance costs, write off	$ 0.5

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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