CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Current Assets:
Cash and Cash Equivalents	$ 9.5	$ 8.9	$ 8.8
Accounts Receivable, net	74.4	67.4	57.6
Accrued Revenue	45.1	53.3	41.3
Exchange Gas Receivable	0.2	5.8	2.1
Gas Inventory	0.4	0.6	0.3
Materials and Supplies	7.8	6.9	7.1
Prepayments and Other	7.1	8.4	8.9
Total Current Assets	144.5	151.3	126.1
Utility Plant:
Gas	706.7	699.6	642.0
Electric	478.8	476.7	440.9
Common	69.1	67.4	35.9
Construction Work in Progress	32.1	35.5	68.6
Total Utility Plant	1,286.7	1,279.2	1,187.4
Less: Accumulated Depreciation	314.3	307.7	296.5
Net Utility Plant	972.4	971.5	890.9
Other Noncurrent Assets:
Regulatory Assets	111.2	109.6	103.5
Other Assets	16.2	9.5	13.9
Total Other Noncurrent Assets	127.4	119.1	117.4
TOTAL ASSETS	1,244.3	1,241.9	1,134.4
Current Liabilities:
Accounts Payable	30.1	41.5	28.1
Short-Term Debt	45.3	38.3	76.6
Long-Term Debt, Current Portion	29.8	29.8	30.0
Regulatory Liabilities	10.9	9.2	12.8
Energy Supply Obligations	7.8	9.7	9.0
Environmental Obligations	0.6	0.5	0.5
Capital Lease Obligations	3.1	3.1	3.0
Interest Payable	6.9	4.4	6.0
Other Current Liabilities	11.8	14.5	11.0
Total Current Liabilities	146.3	151.0	177.0
Noncurrent Liabilities:
Retirement Benefit Obligations	151.6	150.1	151.5
Deferred Income Taxes, net	87.0	82.9	106.0
Cost of Removal Obligations	86.6	84.3	79.7
Regulatory Liabilities	49.1	48.9	0.7
Capital Lease Obligations	4.9	5.7	7.5
Environmental Obligations	1.5	1.6	1.8
Other Noncurrent Liabilities	5.7	4.3	4.9
Total Noncurrent Liabilities	386.4	377.8	352.1
Capitalization:
Long-Term Debt, Less Current Portion	363.0	376.3	303.5
Stockholders' Equity:
Common Equity (Authorized: 25,000,000 and Outstanding:14,860,123, 14,107,741 and 14,815,585 Shares)	277.4	275.8	242.1
Retained Earnings	71.0	60.8	59.5
Total Common Stock Equity	348.4	336.6	301.6
Preferred Stock	0.2	0.2	0.2
Total Stockholders' Equity	348.6	336.8	301.8
Total Capitalization	711.6	713.1	605.3
Commitments and Contingencies (Notes 6 & 7)
TOTAL LIABILITIES AND CAPITALIZATION	$ 1,244.3	$ 1,241.9	$ 1,134.4

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.