Subsequent Event (Details) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
Feb. 28, 2015
Subsequent Event [Member]
Subsequent Event [Line Items]
Acquisition of operating assets	$ 1.5

Amount of cash paid to purchase other assets as part of operating activities.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 17

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3367-108585

Name:	us-gaap_PaymentsForPurchaseOfOtherAssets1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration