SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2014

Summary of Significant Accounting Policies

Schedule of gross operating revenues by segments

Our gross operating revenues in 2014 were derived as follows:

Electric segment sales*	90.8	%
Gas segment sales	8.0
Other segment sales	1.2

* Sales from our electric segment include 0.3% from the sale of water.

Operating revenues

Schedule of asset retirement obligation

(000's)	Liability Balance 12/31/13		Liabilities Recognized		Liabilities Settled			Accretion		Cash Flow Revisions		Liability Balance at 12/31/14
Asset Retirement Obligation	$	4,190	$	—	$	(1,175	)	$	172	$	1,660	$	4,847

(000's)	Liability Balance 12/31/12		Liabilities Recognized		Liabilities Settled			Accretion		Cash Flow Revisions		Liability Balance at 12/31/13
Asset Retirement Obligation	$	4,711	$	—	$	(734	)	$	213	$	—	$	4,190

Schedule of fuel, materials and supplies

These balances are as follows (in thousands):

	2014		2013
Electric fuel inventory	$	26,454	$	17,003
Natural gas inventory		5,040		3,584
Materials and supplies		26,305		28,224
TOTAL	$	57,799	$	48,811

Schedule of weighted average number of shares

	2014		2013		2012
Weighted Average Number Of Shares
Basic		43,291,031		42,781,382		42,256,641
Dilutive Securities:
Performance-based restricted stock awards		8,809		12,142		14,500
Dividend equivalents		—		—		6,329
Employee stock purchase plan		3,422		1,729		1,996
Stock options		—		61		3,160
Time-based restricted stock awards		10,666		7,907		1,820
Total dilutive securities		22,897		21,839		27,805
Diluted weighted average number of shares		43,313,928		42,803,221		42,284,446
Antidilutive Shares		25,259		107,100		128,500

Electric

Operating revenues

Schedule of operating revenues by major customer classes

Our electric operations serve approximately 170,000 customers as of December 31, 2014, and the 2014 electric operating revenues were derived as follows:

Customer	% of revenue
Residential		40.0	%
Commercial		29.2
Industrial		14.4
Wholesale on-system		3.8
Wholesale off-system		7.6
Miscellaneous sources, primarily public authorities		2.6
Other electric revenues		2.4

Schedule of operating revenues, by jurisdiction

Our retail electric revenues for 2014 by jurisdiction were as follows:

Jurisdiction	% of revenue
Missouri		89.7	%
Kansas		4.8
Arkansas		2.7
Oklahoma		2.8

Gas

Operating revenues

Schedule of operating revenues by major customer classes

Our gas operations serve approximately 43,500 customers as of December 31, 2014, and the 2014 gas operating revenues were derived as follows:

Customer	% of revenue
Residential		63.4	%
Commercial		26.3
Industrial		1.0
Other		9.3