Capital Lease Obligations Annual Minimum Payments of Principal and Interest

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- Definition

Capital Leases Future Minimum Payments of Interest Due

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Capital Leases Future Minimum Payments of Interest Due in Five Years

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- Definition

Capital Leases Future Minimum Payments of Interest Due in Four Years

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- Definition

Capital Leases Future Minimum Payments of Interest Due in Three Years

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- Definition

Capital Leases Future Minimum Payments of Interest Due in Two Years

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- Definition

Capital Leases Future Minimum Payments of Interest Due Thereafter

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- Definition

Capital Leases Future Minimum Payments of Interest Next Twelve Months

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Capital Leases Future Minimum Payments of Principal Next Twelve Months

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Capital Leases Future Minimum Payments of Principal Thereafter

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Capital Leases Future Minimum Payments of Principal Year Five

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Capital Leases Future Minimum Payments of Principal Year Four

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Capital Leases Future Minimum Payments of Principal Year Three

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Capital Leases Future Minimum Payments of Principal Year Two

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- Definition

Long Term Revenue Bonds

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Long Term Revenue Bonds Stated Interest Rate

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- Definition

Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

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- Definition

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

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- Definition

Amount of minimum lease payments for capital leases.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

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Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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- Definition

The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 2)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

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Amount of operating expense for products and services of regulated operation.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(b))

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Long-Term Debt Long-Term Debt (Capital Lease Obligations) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 18, 1998
Debt Instrument [Line Items]
Utilities Operating Expense, Products and Services	$ 678,244,000	$ 689,586,000	$ 693,127,000
AIDEA [Member]
Debt Instrument [Line Items]
Long Term Revenue Bonds				100,000,000
Alaska Electric Light & Power [Member]
Debt Instrument [Line Items]
Capital Leased Assets, Gross	71,000,000
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	1,800,000
Alaska Electric Light & Power [Member] \| Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Capital Lease Obligations Principal Year 1	2,230,000
Capital Lease Obligations Principal	69,955,000
Capital Lease Obligations Annual Minimum Payments of Principal and Interest	5,900,000
Capital Leases Obligations Principal Year 2	2,350,000
Capital Leases Obligations Principal Year 3	2,480,000
Capital Leases Obligations Principal Year 4	2,615,000
Capital Leases Obligations Principal Year 5	2,755,000
Capital Leases Obligations Principal Thereafter	57,525,000
Capital Lease Obligations Interest Year 1	3,690,000
Capital Leases Obligations Interest Year 2	3,567,000
Capital Leases Obligations Interest Year 3	3,438,000
Capital Leases Obligations Interest Year 4	3,305,000
Capital Leases Obligations Interest Year 5	3,165,000
Capital Leases Obligations Interest Thereafter	25,364,000
Capital Leases Obligations Interest	42,529,000
Capital Leases, Future Minimum Payments, Remainder of Fiscal Year	5,920,000
Capital Leases, Future Minimum Payments Due in Two Years	5,917,000
Capital Leases, Future Minimum Payments Due in Three Years	5,918,000
Capital Leases, Future Minimum Payments Due in Four Years	5,920,000
Capital Leases, Future Minimum Payments Due in Five Years	5,920,000
Capital Leases, Future Minimum Payments Due Thereafter	82,889,000
Capital Leases, Future Minimum Payments Due	112,484,000
Fair Value, Inputs, Level 3 [Member] \| Carrying Value [Member] \| Alaska Electric Light & Power [Member] \| Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Capital Lease Obligations Principal	69,955,000	0
Alaska Electric Light & Power [Member]
Debt Instrument [Line Items]
Utilities Operating Expense, Products and Services	5,900,000	0	0
Alaska Electric Light & Power [Member] \| Power purchase agreement [Member]
Debt Instrument [Line Items]
Utilities Operating Expense, Products and Services	10,600,000
Alaska Electric Light & Power [Member] \| Capital Lease Amortization [Member]
Debt Instrument [Line Items]
Utilities Operating Expense, Products and Services	1,800,000
Alaska Electric Light & Power [Member] \| Capital Lease Interest [Member]
Debt Instrument [Line Items]
Utilities Operating Expense, Products and Services	$ 1,900,000
Minimum [Member] \| AIDEA [Member]
Debt Instrument [Line Items]
Long Term Revenue Bonds Stated Interest Rate				4.85%
Maximum [Member] \| AIDEA [Member]
Debt Instrument [Line Items]
Long Term Revenue Bonds Stated Interest Rate				6.00%