CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and Cash Equivalents	$ 8,700	$ 8,400
Accounts Receivable, net	49,800	60,700
Accrued Revenue	38,400	48,500
Exchange Gas Receivable	11,100	15,000
Gas Inventory	800	1,100
Deferred Income Taxes	4,700
Prepayments and Other	12,400	11,500
Total Current Assets	125,900	145,200
Utility Plant:
Gas	576,800	522,900
Electric	408,400	390,600
Common	35,500	32,700
Construction Work in Progress	59,900	42,600
Utility Plant	1,080,600	988,800
Less: Accumulated Depreciation	271,700	255,100
Net Utility Plant	808,900	733,700
Other Noncurrent Assets:
Regulatory Assets	99,600	107,600
Other Assets	12,000	13,700
Total Other Noncurrent Assets	111,600	121,300
TOTAL ASSETS	1,046,400	1,000,200
Current Liabilities:
Accounts Payable	33,300	44,200
Short-Term Debt	42,000	29,300
Long-Term Debt, Current Portion	17,400	4,000
Regulatory Liabilities	15,600	8,700
Energy Supply Obligations	14,600	22,100
Environmental Obligations	1,300	3,500
Capital Lease Obligations	3,100	500
Deferred Income Taxes		3,100
Taxes Payable	2,400	100
Other Current Liabilities	14,900	13,900
Total Current Liabilities	144,600	129,400
Noncurrent Liabilities:
Deferred Income Taxes	92,208	72,870
Cost of Removal Obligations	70,100	63,800
Retirement Benefit Obligations	124,400	118,600
Regulatory Liabilities	8,100	100
Capital Lease Obligations	11,000	7,500
Environmental Obligations	1,500	2,000
Other Noncurrent Liabilities	3,600	3,700
Total Noncurrent Liabilities	310,900	268,600
Capitalization:
Long-Term Debt, Less Current Portion	308,100	328,900
Stockholders' Equity:
Common Equity (Outstanding 13,991,430 and 13,916,026 Shares)	237,500	234,700
Retained earnings	45,100	38,400
Total Common Stock Equity	282,600	273,100
Preferred Stock	200	200
Total Stockholders' Equity	282,800	273,300
Total Capitalization	$ 590,900	$ 602,200
Commitments and Contingencies (Note 8)
TOTAL LIABILITIES AND CAPITALIZATION	$ 1,046,400	$ 1,000,200

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.