Earnings (Loss) Per Share - Additional Information (Details)	3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]
Stock conversion ratio	100.00%

Conversion ratio of operating partnership unit to common stock.

No definition available.

Name:	nxrt_ConversionRatioOfOperatingPartnershipUnitToCommonStock
Namespace Prefix:	nxrt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration