Transactions with Affiliates (Tables)

12 Months Ended

Dec. 31, 2017

Related Party Transactions [Abstract]

Schedule of activities with affiliates

Activities with affiliates were as follows for the periods indicated (in thousands):

	Year Ended December 31,
	2017		2016		2015
Overhead recoveries (1)	$	—	$	32	$	97
Affiliate billings to us	81		65		68
Billings to affiliates	4		5		35
Rentals paid to affiliate	583		628		618
Fee paid to Bencap (2)	108		583		—

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(1) In connection with the operation of certain crude oil and natural gas properties, we charged related parties for administrative overhead. In late 2016, these charges ended as properties were either plugged and abandoned or operating responsibilities for these properties were transferred to another entity.

(2) Amount represents fees paid to Bencap through the forfeiture of our investment during the first quarter of 2017. As a result of the investment forfeiture, Bencap is no longer an affiliate.