Accounts Receivable

6 Months Ended

Jun. 30, 2013

Receivables [Abstract]

Accounts Receivable [Text Block]

ACCOUNTS RECEIVABLE

Following is a summary of Accounts receivable, net included in the accompanying Condensed Consolidated Balance Sheets (in thousands) as of:

	Accounts		Unbilled		Less Allowance for			Accounts
June 30, 2013	Receivable, Trade		Revenue		Doubtful Accounts			Receivable, net
Electric Utilities	$	45,250	$	24,290	$	(630	)	$	68,910
Gas Utilities	38,749		13,192		(1,074		)	50,867
Power Generation	157		—		—			157
Coal Mining	2,503		—		—			2,503
Oil and Gas	8,373		—		(19		)	8,354
Corporate	1,935		—		—			1,935
Total	$	96,967	$	37,482	$	(1,723	)	$	132,726

	Accounts		Unbilled		Less Allowance for			Accounts
Dec. 31, 2012	Receivable, Trade		Revenue		Doubtful Accounts			Receivable, net
Electric Utilities	$	54,482	$	23,843	$	(527	)	$	77,798
Gas Utilities	31,495		39,962		(222		)	71,235
Power Generation	16		—		—			16
Coal Mining	2,247		—		—			2,247
Oil and Gas	11,622		—		(19		)	11,603
Corporate	799		—		—			799
Total	$	100,661	$	63,805	$	(768	)	$	163,698

	Accounts		Unbilled		Less Allowance for			Accounts
June 30, 2012	Receivable, Trade		Revenue		Doubtful Accounts			Receivable, net
Electric Utilities	$	36,336	$	25,726	$	(620	)	$	61,442
Gas Utilities	20,627		11,085		(950		)	30,762
Power Generation	197		—		—			197
Coal Mining	1,982		—		—			1,982
Oil and Gas	13,749		—		(105		)	13,644
Corporate	1,130		—		—			1,130
Total	$	74,021	$	36,811	$	(1,675	)	$	109,157