Balance Sheet Components Balance Sheet Components (Policies)

6 Months Ended

Jun. 30, 2019

Balance Sheet Related Disclosures [Abstract]

Inventory, Policy [Policy Text Block]

Inventories of materials and supplies, fuel stock and stored natural gas are recorded at average cost for our regulated operations and the lower of cost or market for our non-regulated operations and consisted of the following as of June 30, 2019 and December 31, 2018 (dollars in thousands):

	June 30,		December 31,
	2019		2018
Materials and supplies	$	46,886	$	47,403
Fuel stock	6,332		4,869
Stored natural gas	14,441		11,609
Total	$	67,659	$	63,881