CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Current Assets:
Cash and Cash Equivalents	$ 10.9	$ 5.8	$ 4.4
Accounts Receivable, net	45.8	52.9	43.1
Accrued Revenue	39.2	49.5	35.5
Exchange Gas Receivable	9.5	8.3	9.8
Refundable Taxes	1.8	1.7	1.3
Gas Inventory	0.7	0.6	0.6
Materials and Supplies	7.3	6.8	6.9
Prepayments and Other	6.8	6.0	6.0
Total Current Assets	122.0	131.6	107.6
Utility Plant:
Gas	646.7	629.5	597.7
Electric	454.6	437.9	424.0
Common	36.0	35.8	35.7
Construction Work in Progress	113.0	70.2	89.6
Total Utility Plant	1,250.3	1,173.4	1,147.0
Less: Accumulated Depreciation	303.6	290.0	286.0
Net Utility Plant	946.7	883.4	861.0
Other Noncurrent Assets:
Regulatory Assets	102.0	104.1	96.5
Other Assets	9.2	9.1	7.3
Total Other Noncurrent Assets	111.2	113.2	103.8
TOTAL ASSETS	1,179.9	1,128.2	1,072.4
Current Liabilities:
Accounts Payable	24.1	32.4	23.1
Short-Term Debt	111.9	81.9	36.9
Long-Term Debt, Current Portion	29.8	16.8	17.0
Regulatory Liabilities	15.0	10.4	13.2
Energy Supply Obligations	12.9	12.0	13.2
Environmental Obligations	0.5	0.4	0.3
Capital Lease Obligations	3.1	3.0	3.1
Interest Payable	6.0	3.9	6.3
Other Current Liabilities	13.0	16.1	13.2
Total Current Liabilities	216.3	176.9	126.3
Noncurrent Liabilities:
Retirement Benefit Obligations	155.0	149.0	127.8
Deferred Income Taxes, net	109.2	97.9	99.6
Cost of Removal Obligations	84.8	77.0	77.4
Regulatory Liabilities		2.6	3.7
Capital Lease Obligations	6.4	8.3	9.0
Environmental Obligations	1.7	1.5	2.7
Other Noncurrent Liabilities	4.6	5.1	3.8
Total Noncurrent Liabilities	361.7	341.4	324.0
Capitalization:
Long-Term Debt, Less Current Portion	303.6	316.8	335.0
Stockholders' Equity:
Common Equity (Authorized: 25,000,000 and Outstanding: 14,119,893, 14,060,147 and 14,065,230 Shares)	243.4	240.7	239.9
Retained Earnings	54.7	52.2	47.0
Total Common Stock Equity	298.1	292.9	286.9
Preferred Stock	0.2	0.2	0.2
Total Stockholders' Equity	298.3	293.1	287.1
Total Capitalization	601.9	609.9	622.1
Commitments and Contingencies (Notes 6 & 7)
TOTAL LIABILITIES AND CAPITALIZATION	$ 1,179.9	$ 1,128.2	$ 1,072.4

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.