Related Party Transactions

3 Months Ended

Mar. 31, 2013

Related Party Transactions [Abstract]

Related Party Transactions Disclosure [Text Block]

RELATED-PARTY TRANSACTIONS

Receivables and Payables

We have accounts receivable and accounts payable balances related to transactions with other BHC subsidiaries. The balances were as follows (in thousands) as of:

	March 31, 2013		December 31, 2012
Receivables - affiliates	$	4,896	$	5,027
Accounts payable - affiliates	$	18,030	$	21,896

Money Pool Notes Receivable and Notes Payable

We have entered into a Utility Money Pool Agreement (the “Agreement”) with BHC, Cheyenne Light and Black Hills Energy. Under the Agreement, we may borrow from BHC however the Agreement restricts us from loaning funds to BHC or to any of BHC’s non-utility subsidiaries. The Agreement does not restrict us from making dividends to BHC. Borrowings under the Agreement bear interest at the weighted average daily cost of external funds as defined under the Agreement, or if there are no external funds outstanding on that date, then the rate will be the daily one-month LIBOR plus 1.0%. Advances under the Utility Money Pool notes bear interest at a weighted average daily rate (1.78% at March 31, 2013).

We had the following balances with the Utility Money Pool (in thousands) as of:

	March 31, 2013		December 31, 2012
Money pool notes receivable, net	$	35,063	$	31,645

Net interest income (expense) relating to balances for the Utility Money Pool was as follows (in thousands):

	Three Months Ended March 31,
	2013			2012
Net interest income (expense)	$	(440	)	$	283

Other Balances and Transactions

Sales and purchases with related parties were as follows (in thousands):

	Three Months Ended March 31,
	2013		2012
Revenues:
Energy sold to Cheyenne Light	$	140	$	526
Rent from electric properties	$	988	$	1,259
Purchases:
Purchase of coal from WRDC	$	4,524	$	5,995
Purchase of excess energy from Cheyenne Light	$	946	$	742
Purchase of renewable wind energy from Cheyenne Light - Happy Jack	$	650	$	671
Purchase of renewable wind energy from Cheyenne Light - Silver Sage	$	1,085	$	1,077
Purchase of natural gas - other	$	—	$	7
Corporate support services from Parent, Black Hills Service Company and Black Hills Utilities Holdings Inc.	$	7,276	$	4,805