PARTNERS' CAPITAL (Tables)

3 Months Ended

Mar. 31, 2019

A rollforward of the number of common limited partner, preferred limited partner and General Partner units follows.

	Limited partners
	Series A Preferred Units		Common		General Partner
Units, January 1, 2019		300,000		73,390,853		1,490,999
Conversion of General Partner economic interests		—		8,750,000		(1,490,999	)
Net units issued under the SMLP LTIP		—		554,458		—
Units, March 31, 2019		300,000		82,695,311		—

Details of cash distributions

We paid the following per-unit distributions during the three months ended March 31:

	Three months ended March 31,
	2019		2018
Per-unit distributions to unitholders	$	0.575	$	0.575

Our payment of IDRs as reported in distributions to unitholders – general partner in the statement of partners' capital during the three months ended March 31 follow.

	Three months ended March 31,
	2019		2018
	(In thousands)
IDR payments	$	2,139	$	2,128