XML 36 R21.htm IDEA: XBRL DOCUMENT v3.3.1.900

Rate and Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2015

Rate and Regulatory Matters [Abstract]

Schedule of regulatory assets

		(Thousands of Dollars)
		December 31,								Remaining
Regulatory Assets		2015				2014				Recovery Periods
Retirement Benefits		$	39,378			$	47,868				Various
Income Taxes			15,541				17,195				Various
Rate Cases, Tank Painting, and Other			3,633				1,153				2-9 years
Total		$	58,552			$	66,216

X

- References

No definition available.

+ Details

Name:	us-gaap_RegulatedOperationsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44264-110382

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 715
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6501251&loc=d3e52485-110419

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382

+ Details

Name:	us-gaap_ScheduleOfRegulatoryAssetsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration