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Summary Of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2014
Accounting Policies [Abstract]  
Appropriated Retained Earnings [Table Text Block]
The appropriated retained earnings amounts included in retained earnings were as follows as of March 31, 2014 and December 31, 2013 (dollars in thousands):
 
March 31,
 
December 31,
 
2014
 
2013
Appropriated retained earnings
$
9,714

 
$
9,714
Schedule of Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive loss, net of tax, consisted of the following as of March 31, 2014 and December 31, 2013 (dollars in thousands):
 
March 31,
 
December 31,
 
2014
 
2013
Unfunded benefit obligation for pensions and other postretirement benefit plans - net of taxes of $(2,220) and $(2,280), respectively
$
(4,122
)
 
$
(4,233
)
Unrealized loss on securities available for sale - net of taxes of $(474) and $(936), respectively
(803
)
 
(1,586
)
Total accumulated other comprehensive loss
$
(4,925
)
 
$
(5,819
)
Reclassifications Out of Accumulated Other Comprehensive Loss by Component
The following table details the reclassifications out of accumulated other comprehensive loss by component for the three months ended March 31 (dollars in thousands):
 
 
Amounts Reclassified from Accumulated Other Comprehensive Loss
 
 
Details about Accumulated Other Comprehensive Loss Components
 
2014
 
2013
 
Affected Line Item in Statement of Income
Realized gains on investment securities
 
$
3

 
$
2

 
Other income-net
 
 
3

 
2

 
Total before tax
 
 
(1
)
 
(1
)
 
Tax expense
 
 
$
2

 
$
1

 
Net of tax
Amortization of defined benefit pension items
 
 
 
 
 
 
Amortization of net loss
 
$
(1,952
)
 
$
(4,891
)
 
(a)
Adjustment due to effects of regulation
 
1,782

 
4,608

 
(a)
 
 
(170
)
 
(283
)
 
Total before tax
 
 
59

 
99

 
Tax benefit
 
 
$
(111
)
 
$
(184
)
 
Net of tax
(a)
These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (see Note 6 for additional details).
Utility Taxes
Utility related taxes collected from customers (primarily state excise taxes and city utility taxes) are recorded as operating revenue and expense and totaled the following amounts for the three months ended March 31 (dollars in thousands):
 
2014
 
2013
Utility taxes
$
19,738

 
$
17,906
Other Income - Net
Other Income-net consisted of the following items for the three months ended March 31 (dollars in thousands):
 
2014
 
2013
Interest income
$
(274
)
 
$
(258
)
Interest income on regulatory deferrals
(44
)
 
(13
)
Equity-related AFUDC
(2,034
)
 
(1,391
)
Net loss on investments
40

 
398

Other income
(239
)
 
(881
)
Total
$
(2,551
)
 
$
(2,145
)
Materials And Supplies Fuel Stock And Natural Gas Stored
Inventories of materials and supplies, fuel stock and natural gas stored are recorded at average cost for our regulated operations and the lower of cost or market for our non-regulated operations and consisted of the following as of March 31, 2014 and December 31, 2013 (dollars in thousands):
 
March 31,
 
December 31,
 
2014
 
2013
Materials and supplies
$
29,158

 
$
28,747

Fuel stock
3,639

 
3,170

Natural gas stored
7

 
13,029

Total
$
32,804

 
$
44,946
Investments And Funds Held For Clients
Investments and funds held for clients as of March 31, 2014 are as follows (dollars in thousands):
 
Amortized
Cost (1)
 
Unrealized
Gain (Loss)
 
Fair Value
Cash and cash equivalents
$
13,618

 
$
—

 
$
13,618

Money market funds
23,034

 
—

 
23,034

Securities available for sale:
 
 
 
 
 
U.S. government agency
55,638

 
(1,311
)
 
54,327

Municipal
3,086

 
23

 
3,109

Corporate fixed income – industrial
752

 
11

 
763

Certificates of deposit
1,000

 
—

 
1,000

Total securities available for sale
60,476

 
(1,277
)
 
59,199

Total investments and funds held for clients
$
97,128

 
$
(1,277
)
 
$
95,851


Investments and funds held for clients as of December 31, 2013 are as follows (dollars in thousands):
 
Amortized
Cost (1)
 
Unrealized
Gain (Loss)
 
Fair Value
Cash and cash equivalents
$
16,147

 
$
—

 
$
16,147

Money market funds
11,180

 
—

 
11,180

Securities available for sale:
 
 
 
 
 
U.S. government agency
63,633

 
(2,555
)
 
61,078

Municipal
3,497

 
21

 
3,518

Corporate fixed income – financial
3,000

 
—

 
3,000

Corporate fixed income – industrial
753

 
12

 
765

Certificates of deposit
1,000

 
—

 
1,000

Total securities available for sale
71,883

 
(2,522
)
 
69,361

Total investments and funds held for clients
$
99,210

 
$
(2,522
)
 
$
96,688

(1)
Amortized cost represents the original purchase price of the investments, plus or minus any amortized purchase premiums or accreted purchase discounts.
Contractual Maturities Of Securities Available For Sale
Contractual maturities of securities available for sale as of March 31, 2014 and December 31, 2013 are as follows (dollars in thousands): 
 
Due within 1 year
 
After 1 but within 5 years
 
After 5 but within 10 years
 
After 10 years
 
Total
March 31, 2014
$
2,235

 
$
10,508

 
$
43,460

 
$
2,996

 
$
59,199

December 31, 2013
5,382

 
12,745

 
48,310

 
2,924

 
69,361
Goodwill
The carrying amount of goodwill as of March 31, 2014 and December 31, 2013 are as follows (dollars in thousands):
 
Ecova
 
Other
 
Accumulated
Impairment
Losses
 
Total
March 31, 2014
$
71,011

 
$
12,979

 
$
(7,733
)
 
$
76,257

December 31, 2013
$
71,011

 
$
12,979

 
$
(7,733
)
 
$
76,257
Other Intangible Amortization
Amortization expense related to Intangible Assets was as follows for the three months ended March 31 (dollars in thousands):
 
2014
 
2013
Intangible asset amortization
$
2,776

 
$
2,579
Future Estimated Amortization Expense
The following table details the estimated amortization expense related to Intangible Assets for each of the next five years ending December 31 (dollars in thousands):
 
Remaining
 
 
 
 
 
 
 
 
 
2014
 
2015
 
2016
 
2017
 
2018
Estimated amortization expense
$
7,863

 
$
8,818

 
$
7,697

 
$
6,887

 
$
4,100
Accumulated Amortization Of Other Intangibles
The gross carrying amount and accumulated amortization of Intangible Assets as of March 31, 2014 and December 31, 2013 are as follows (dollars in thousands):
 
Estimated
 
March 31,
 
December 31,
 
Useful Lives
 
2014
 
2013
Client relationships
2 - 12 years
 
$
33,562

 
$
33,562

Software development costs
3 - 7 years
 
41,146

 
39,327

Other
1 - 10 years
 
3,312

 
3,321

Total intangible assets
 
 
78,020

 
76,210

Client relationships accumulated amortization
 
 
(13,347
)
 
(12,336
)
Software development costs accumulated amortization
 
 
(23,437
)
 
(21,861
)
Other accumulated amortization
 
 
(2,626
)
 
(2,437
)
Total accumulated amortization
 
 
(39,410
)
 
(36,634
)
Total intangible assets - net
 
 
$
38,610

 
$
39,576
Disposition of Available-for-Sale Securities
The following is a summary of the disposition of available-for-sale securities for the three months ended March 31 (dollars in thousands):
 
2014
 
2013
Proceeds from sales, maturities and calls
$
11,403

 
$
7,000

Gross realized gains
3

 
2

Gross realized losses
—

 
—