v3.19.3.a.u2

Earnings per Share - Summary of Components used in Calculation of Basic and Diluted Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic earnings:
Net earnings attributable to Broadstone Net Lease, Inc.	$ 25,934	$ 23,388	$ 16,134	$ 13,938	$ 13,561	$ 21,267	$ 16,974	$ 17,573	$ 79,394	$ 69,375	$ 54,799
Diluted earnings:
Net earnings attributable to Broadstone Net Lease, Inc.	25,934	23,388	16,134	13,938	13,561	21,267	16,974	17,573	79,394	69,375	54,799
Net earnings attributable to non-controlling interests	$ 1,778	$ 1,650	$ 1,208	$ 1,084	$ 1,099	$ 1,797	$ 1,412	$ 1,422	5,720	5,730	4,756
Net income (loss) attributable to parent, Diluted									$ 85,114	$ 75,105	$ 59,555
Basic and diluted weighted average shares outstanding:
Weighted average number of common shares outstanding used in basic earnings per share	25,735	24,642	23,204	22,335	21,416	20,554	19,829	19,167	23,979	20,242	17,084
Effects of convertible OP Units									1,737	1,668	1,483
Weighted average number of common shares outstanding used in diluted earnings per share	27,472	26,379	24,941	24,072	23,154	22,291	21,478	20,719	25,716	21,910	18,567
Basic and diluted net earnings per common share	$ 1.01	$ 0.95	$ 0.70	$ 0.62	$ 0.63	$ 1.03	$ 0.86	$ 0.92	$ 3.31	$ 3.43	$ 3.21

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