Adoption of Accounting Principles and Recently Issued Accounting Pronouncements (Details) (Accounting Standards Update 2014-11 [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Accounting Standards Update 2014-11 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New accounting pronouncement, effect of adoption, increase in assets and liabilities (secured borrowings)	$ 4.4

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

No definition available.

Name:	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration