Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended
Feb. 25, 2014 Depositary units [Member]	May 05, 2014 Dividend Declared [Member] Depositary units [Member] Limited partners	Jul. 29, 2014 Energy Segment [Member]
Subsequent Event [Line Items]
Distribution declared per depositary unit	$ 1.50	$ 1.50
Property damage insurance deductible			$ 5.0
Workers compensation accident deductible			$ 0.5

Aggregate dividends declared during the period for each share of common stock outstanding.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration