CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Current Assets:
Cash and Cash Equivalents	$ 8.8	$ 5.8	$ 8.1
Accounts Receivable, net	57.6	52.9	58.0
Accrued Revenue	41.3	49.5	42.1
Exchange Gas Receivable	2.1	8.3	6.8
Gas Inventory	0.3	0.6	0.4
Prepayments and Other	16.0	14.5	12.7
Total Current Assets	126.1	131.6	128.1
Utility Plant:
Gas	642.0	629.5	586.8
Electric	440.9	437.9	409.9
Common	35.9	35.8	35.8
Construction Work in Progress	68.6	70.2	56.9
Total Utility Plant	1,187.4	1,173.4	1,089.4
Less: Accumulated Depreciation	296.5	290.0	276.3
Net Utility Plant	890.9	883.4	813.1
Other Noncurrent Assets:
Regulatory Assets	103.5	104.1	98.2
Other Assets	13.9	9.1	13.5
Total Other Noncurrent Assets	117.4	113.2	111.7
TOTAL ASSETS	1,134.4	1,128.2	1,052.9
Current Liabilities:
Accounts Payable	28.1	32.4	27.0
Short-Term Debt	76.6	81.9	47.9
Long-Term Debt, Current Portion	30.0	16.8	17.1
Regulatory Liabilities	12.8	10.4	18.8
Energy Supply Obligations	9.0	12.0	13.9
Environmental Obligations	0.5	0.4	0.7
Capital Lease Obligations	3.0	3.0	3.1
Interest Payable	6.0	3.9	6.1
Other Current Liabilities	11.0	16.1	11.4
Total Current Liabilities	177.0	176.9	146.0
Noncurrent Liabilities:
Retirement Benefit Obligations	151.5	149.0	126.8
Deferred Income Taxes, net	106.0	97.9	93.1
Cost of Removal Obligations	79.7	77.0	72.3
Regulatory Liabilities	0.7	2.6	3.3
Capital Lease Obligations	7.5	8.3	10.4
Environmental Obligations	1.8	1.5	2.0
Other Noncurrent Liabilities	4.9	5.1	3.5
Total Noncurrent Liabilities	352.1	341.4	311.4
Capitalization:
Long-Term Debt, Less Current Portion	303.5	316.8	305.4
Stockholders' Equity:
Common Equity (Authorized: 25,000,000 and Outstanding:14,107,741, 14,043,280 and 14,065,230 Shares)	242.1	240.7	238.9
Retained Earnings	59.5	52.2	51.0
Total Common Stock Equity	301.6	292.9	289.9
Preferred Stock	0.2	0.2	0.2
Total Stockholders' Equity	301.8	293.1	290.1
Total Capitalization	605.3	609.9	595.5
Commitments and Contingencies (Notes 6 & 7)
TOTAL LIABILITIES AND CAPITALIZATION	$ 1,134.4	$ 1,128.2	$ 1,052.9

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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Namespace Prefix:	us-gaap_
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.