Commitments and Contingencies (Details)	3 Months Ended
Mar. 31, 2015
Minimum [Member]
Property Subject to or Available for Operating Lease [Line Items]
Lease terms	7 years
Maximum [Member]
Property Subject to or Available for Operating Lease [Line Items]
Lease terms	75 years

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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