CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Lease revenue	$ 40,422	$ 33,785	$ 80,046	$ 67,450
Operating costs and expenses
General and administrative expense	6,866	4,980	12,847	10,525
Depreciation	12,982	11,410	25,669	22,484
Total operating costs and expenses	19,848	16,390	38,516	33,009
Income from operations	20,574	17,395	41,530	34,441
Other (expense) income
Interest expense, net	(10,141)	(9,055)	(19,839)	(17,897)
Other income, net	17	1,137	20	1,896
Total other expense	(10,124)	(7,918)	(19,819)	(16,001)
Income before income taxes	10,450	9,477	21,711	18,440
Income tax expense	321	293	565	479
Net income	10,129	9,184	21,146	17,961
Less: Net income attributable to noncontrolling interest	2,821	2,576	5,889	5,038
Net income attributable to InfraREIT, Inc.	$ 7,308	$ 6,608	$ 15,257	$ 12,923
Net income attributable to InfraREIT, Inc. common stockholders per share:
Basic	$ 0.17	$ 0.15	$ 0.35	$ 0.30
Diluted	0.17	0.15	0.35	0.30
Cash dividends declared per common share	$ 0.25	$ 0.25	$ 0.50	$ 0.50