Fair Value Measurements (Narratives) (Details)	9 Months Ended
Sep. 30, 2013
Fair value valuation technique
Fair value measurements valuation techniques	We determined the estimated fair value using a discounted cash flow model with rates that take into account the interest rate risk. We also considered the value of the underlying collateral taking into account the quality of the collateral and the then-current interest rate.

Description of the inputs and valuation technique(s) used to measure fair value.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

Name:	us-gaap_FairValueMeasurementsValuationTechniques
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration