CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Lease revenue	$ 49,419	$ 41,452	$ 116,869	$ 100,282
Operating costs and expenses
General and administrative expense	5,336	5,504	15,861	58,965
Depreciation	11,828	10,259	34,312	29,438
Total operating costs and expenses	17,164	15,763	50,173	88,403
Income from operations	32,255	25,689	66,696	11,879
Other (expense) income
Interest expense, net	(9,379)	(6,723)	(27,276)	(21,084)
Other income, net	1,024	707	2,920	2,180
Total other expense	(8,355)	(6,016)	(24,356)	(18,904)
Income (loss) before income taxes	23,900	19,673	42,340	(7,025)
Income tax expense	299	243	778	575
Net income (loss)	23,601	19,430	41,562	(7,600)
Less: Net income (loss) attributable to noncontrolling interest	6,560	5,458	11,598	(1,061)
Net income (loss) attributable to InfraREIT, Inc.	$ 17,041	$ 13,972	$ 29,964	$ (6,539)
Net income (loss) attributable to InfraREIT, Inc. common stockholders per share:
Basic	$ 0.39	$ 0.32	$ 0.69	$ (0.15)
Diluted	0.39	0.32	0.69	(0.15)
Cash dividends declared per common share	$ 0.250	$ 0.225	$ 0.750	$ 0.850