18. Redeemable Series A Preferred Units

The Partnership has issued non-cumulative, non-voting, non-convertible Series A Preferred Units via private placements to five financial institutions. The Series A Preferred Units are redeemable in the future and represent limited partnership interests in the Partnership. The balance of Series A Preferred Units on the condensed consolidated balance sheet is presented net of issuance costs. The following table summarizes the outstanding Series A Preferred Units at September 30, 2018 and December 31, 2017:

Month Issued	Units		Purchase Price		Distribution Rate			Redemption Price per Unit		Earliest Redemption Date
March 2016		1,000,000	$	10,000,000		3.00	%	$	10.00	March 2022
May 2016		1,386,900		13,869,000		3.00	%		10.00	May 2022
September 2016		1,000,000		10,000,000		3.00	%		10.00	September 2022
December 2016		700,000		7,000,000		3.00	%		10.00	December 2022
March 2017		1,613,100		16,131,000		3.00	%		10.00	March 2023
August 2017		2,000,000		20,000,000		3.00	%		10.00	August 2023
October 2017		1,750,000		17,500,000		3.00	%		10.00	October 2023
Preferred Units at September 30, 2018 and December 31, 2017		9,450,000	$	94,500,000