Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2015

Related Party Transactions [Abstract]

Schedule of Related Party Accounts Receivable and Payable

We have accounts receivable and accounts payable balances related to transactions with other BHC subsidiaries. These balances as of December 31 were as follows (in thousands):

	2015		2014
Receivable - affiliates	$	5,747	$	5,350
Accounts payable - affiliates	$	30,032	$	19,242

Schedule of Related Party Notes and Associated Interest Income Expense

We had the following balances with the Utility Money Pool as of December 31 (in thousands):

	2015		2014
Notes receivable (payable), net	$	76,813	$	68,626

Schedule of Related Party Interest Income Expense

Net interest income (expense) relating to the Utility Money Pool for the years ended December 31, was as follows (in thousands):

	2015		2014		2013
Net interest income (expense)	$	1,153	$	304	$	505

Schedule of Revenues and Purchases from Related Parties

We had the following related party transactions for the years ended December 31 included in the corresponding captions in the accompanying Statements of Income:

	2015		2014		2013
	(in thousands)
Revenues:
Energy sold to Cheyenne Light	$	1,857	$	1,894	$	1,338
Rent from electric properties	$	4,772	$	4,102	$	3,627
Purchases:
Purchase of coal from WRDC	$	16,401	$	16,861	$	18,542
Purchase of excess energy from Cheyenne Light	$	898	$	3,033	$	3,640
Purchase of renewable wind energy from Cheyenne Light - Happy Jack	$	1,578	$	1,959	$	1,886
Purchase of renewable wind energy from Cheyenne Light - Silver Sage	$	2,739	$	3,200	$	3,207
Corporate support services from Parent, Black Hills Service Company and Black Hills Utility Holdings	$	26,655	$	32,332	$	30,738