Summary of Significant Accounting Policies (Details) (Maximum [Member], Interest Rate Swap [Member])	3 Months Ended
Mar. 31, 2015
Maximum [Member] \| Interest Rate Swap [Member]
Derivative [Line Items]
Term of derivative contract	20 years

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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