(1)	On July 26, 2021, we declared this quarterly distribution payable on August 13, 2021 to all unitholders of record as of August 6, 2021.

Unit Repurchase Program

In May 2018, the MGP board of directors approved the establishment of a unit repurchase program authorizing us to repurchase and retire up to $100 million of ARLP common units. The program has no time limit and we may repurchase units from time to time in the open market or in other privately negotiated transactions. The unit repurchase program authorization does not obligate us to repurchase any dollar amount or number of units. No unit repurchases were made during the six months ended June 30, 2021. Since inception of the unit repurchase program, we have repurchased and retired 5,460,639 units at an average unit price of $17.12 for an aggregate purchase price of $93.5 million. The remaining authorized amount for unit repurchases under this program is $6.5 million.

Change in Partners' Capital

The following tables present the quarterly change in Partners' Capital for the six months ended June 30, 2021 and 2020:


				Accumulated
	Number of	Limited		Other
	Limited Partner	Partners'		Comprehensive		Noncontrolling		Total Partners'
	Units	Capital		Income (Loss)		Interest		Capital

	(in thousands, except unit data)
Balance at January 1, 2021	127,195,219	$	1,148,565	$	(87,674)	$	11,376	$	1,072,267
Comprehensive income:
Net income	—		24,748		—		78		24,826
Actuarially determined long-term liability adjustments	—		—		2,231		—		2,231
Total comprehensive income									27,057
Common unit-based compensation	—		723		—		—		723
Distributions from consolidated company to noncontrolling interest	—		—		—		(141)		(141)
Balance at March 31, 2021	127,195,219		1,174,036		(85,443)		11,313		1,099,906
Comprehensive income:
Net income	—		44,035		—		130		44,165
Actuarially determined long-term liability adjustments	—		—		2,231		—		2,231
Total comprehensive income									46,396
Common unit-based compensation	—		1,485		—		—		1,485
Distributions on deferred common unit-based compensation	—		(324)		—		—		(324)
Distributions from consolidated company to noncontrolling interest	—		—		—		(222)		(222)
Distributions to Partners	—		(12,721)		—		—		(12,721)
Balance at June 30, 2021	127,195,219	$	1,206,511	$	(83,212)	$	11,221	$	1,134,520


				Accumulated
	Number of	Limited		Other
	Limited Partner	Partners'		Comprehensive		Noncontrolling		Total Partners'
	Units	Capital		Income (Loss)		Interest		Capital

	(in thousands, except unit data)
Balance at January 1, 2020	126,915,597	$	1,331,482	$	(77,993)	$	11,935	$	1,265,424
Comprehensive income (loss):
Net income (loss)	—		(144,783)		—		76		(144,707)
Actuarially determined long-term liability adjustments	—		—		938		—		938
Total comprehensive loss									(143,769)
Settlement of deferred compensation plans	279,622		(1,310)		—		—		(1,310)
Common unit-based compensation	—		(527)		—		—		(527)
Distributions on deferred common unit-based compensation	—		(986)		—		—		(986)
Distributions from consolidated company to noncontrolling interest	—		—		—		(288)		(288)
Distributions to Partners	—		(50,767)		—		—		(50,767)
Other	—		(273)		—		—		(273)
Balance at March 31, 2020	127,195,219		1,132,836		(77,055)		11,723		1,067,504
Comprehensive income (loss):
Net loss	—		(46,664)		—		(15)		(46,679)
Actuarially determined long-term liability adjustments	—		—		939		—		939
Total comprehensive loss									(45,740)
Common unit-based compensation	—		1,610		—		—		1,610
Distributions from consolidated company to noncontrolling interest	—		—		—		(222)		(222)
Balance at June 30, 2020	127,195,219	$	1,087,782	$	(76,116)	$	11,486	$	1,023,152