CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Lease revenue	$ 45,656	$ 39,624
Operating costs and expenses
General and administrative expense	6,088	5,981
Depreciation	11,577	12,687
Total operating costs and expenses	17,665	18,668
Income from operations	27,991	20,956
Other (expense) income
Interest expense, net	(10,674)	(9,698)
Other income, net	733	3
Total other expense	(9,941)	(9,695)
Income before income taxes	18,050	11,261
Income tax expense	286	244
Net income	17,764	11,017
Less: Net income attributable to noncontrolling interest	4,900	3,068
Net income attributable to InfraREIT, Inc.	$ 12,864	$ 7,949
Net income attributable to InfraREIT, Inc. common stockholders per share:
Basic	$ 0.29	$ 0.18
Diluted	0.29	0.18
Cash dividends declared per common share	$ 0.25	$ 0.25