Basis of Presentation and Significant Accounting Policies Cash Equivalents Original Maturities (Details)	Sep. 30, 2015
Maximum
Restricted Cash and Cash Equivalents Items [Line Items]
Contractual Maturities of Time Deposits, $100,000 or More, Description	3 months

Period of time between issuance and maturity of customer deposits, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Name:	us-gaap_MaturityOfTimeDeposits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration