REGULATORY ASSETS & REGULATORY LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2015

Regulatory Assets and Liabilities Disclosure [Abstract]

Schedule of Regulatory Assets

Regulatory Assets consisted of the following items (in thousands):

	March 31, 2015		December 31, 2014
Environmental Remediation Costs:
Expended - Net	$	28,057	$	29,540
Liability for Future Expenditures	124,761		124,308
Deferred Asset Retirement Obligation Costs	31,604		31,584
Deferred Pension and Other Postretirement Benefit Costs	99,040		99,040
Deferred Gas Costs - Net	20,291		32,202
Societal Benefit Costs Receivable	—		385
Deferred Interest Rate Contracts	8,330		7,325
Energy Efficiency Tracker	1,782		11,247
Pipeline Supplier Service Charges	5,025		5,441
Pipeline Integrity Cost	3,439		3,431
AFUDC - Equity Related Deferrals	10,987		10,781
Other Regulatory Assets	1,693		1,876
Total Regulatory Assets	$	335,009	$	357,160

Schedule of Regulatory Liabilities

Regulatory Liabilities consisted of the following items (in thousands):

	March 31, 2015		December 31, 2014
Excess Plant Removal Costs	$	35,762	$	35,940
Conservation Incentive Program Payable	21,825		4,700
Societal Benefit Costs	8,939		—
Other Regulatory Liabilities	—		1,259
Total Regulatory Liabilities	$	66,526	$	41,899