CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Total revenues	$ 185,547	$ 217,371	$ 434,951	$ 459,502
Operating expenses (income):
Third-party development and management services	4,977	4,513	11,184	8,699
General and administrative	9,767	8,115	19,925	15,430
Depreciation and amortization	66,441	68,815	132,610	137,570
Ground/facility leases	2,893	3,236	6,962	6,785
Loss (gain) from disposition of real estate	0	282	(48,525)	282
Provision for impairment	0	0	0	3,201
Total operating expenses	173,035	179,530	306,953	362,662
Operating income	12,512	37,841	127,998	96,840
Nonoperating income (expenses):
Interest income	870	969	1,721	1,895
Interest expense	(27,168)	(27,068)	(54,951)	(54,129)
Amortization of deferred financing costs	(1,255)	(1,218)	(2,542)	(2,350)
Loss from early extinguishment of debt	0	0	(4,827)	0
Total nonoperating expenses	(27,553)	(27,317)	(60,599)	(54,584)
(Loss) income before income taxes	(15,041)	10,524	67,399	42,256
Income tax provision	(381)	(314)	(760)	(678)
Net (loss) income	(15,422)	10,210	66,639	41,578
Net loss (income) attributable to noncontrolling interests	2,078	176	872	(1,552)
Net (loss) income attributable to ACC, Inc. and Subsidiaries common stockholders	(13,344)	10,386	67,511	40,026
Other comprehensive income (loss)
Change in fair value of interest rate swaps and other	282	(8,593)	(9,519)	(14,387)
Comprehensive (loss) income	$ (13,062)	$ 1,793	$ 57,992	$ 25,639
Net (loss) income per share attributable to ACC, Inc. and Subsidiaries common shareholders
Basic and diluted (in dollars per share)	$ (0.10)	$ 0.07	$ 0.48	$ 0.28
Weighted-average common shares outstanding:
Basic (in shares)	137,613,560	137,268,696	137,545,365	137,185,576
Diluted (in shares)	137,613,560	138,243,388	138,652,106	138,198,134
Owned properties
Revenues:
Revenues	$ 177,186	$ 203,156	$ 409,277	$ 427,575
Operating expenses (income):
Operating expenses	85,749	90,763	178,223	182,932
On-campus participating properties
Revenues:
Revenues	4,101	6,396	14,810	17,844
Operating expenses (income):
Operating expenses	3,208	3,806	6,574	7,763
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP
Revenues:
Total revenues	185,547	217,371	434,951	459,502
Operating expenses (income):
Third-party development and management services	4,977	4,513	11,184	8,699
General and administrative	9,767	8,115	19,925	15,430
Depreciation and amortization	66,441	68,815	132,610	137,570
Ground/facility leases	2,893	3,236	6,962	6,785
Loss (gain) from disposition of real estate	0	282	(48,525)	282
Provision for impairment	0	0	0	3,201
Total operating expenses	173,035	179,530	306,953	362,662
Operating income	12,512	37,841	127,998	96,840
Nonoperating income (expenses):
Interest income	870	969	1,721	1,895
Interest expense	(27,168)	(27,068)	(54,951)	(54,129)
Amortization of deferred financing costs	(1,255)	(1,218)	(2,542)	(2,350)
Loss from early extinguishment of debt	0	0	(4,827)	0
Total nonoperating expenses	(27,553)	(27,317)	(60,599)	(54,584)
(Loss) income before income taxes	(15,041)	10,524	67,399	42,256
Income tax provision	(381)	(314)	(760)	(678)
Net (loss) income	(15,422)	10,210	66,639	41,578
Net (loss) income attributable to ACC, Inc. and Subsidiaries common stockholders	(13,376)	10,440	67,769	40,240
Series A preferred unit distributions	(14)	(9)	(28)	(40)
Net (loss) income attributable to common unitholders	(13,390)	10,431	67,741	40,200
Other comprehensive income (loss)
Change in fair value of interest rate swaps and other	282	(8,593)	(9,519)	(14,387)
Comprehensive (loss) income	$ (13,108)	$ 1,838	$ 58,222	$ 25,813
Net (loss) income per share attributable to ACC, Inc. and Subsidiaries common shareholders
Basic and diluted (in dollars per share)			$ 0.48	$ 0.28
Net (loss) income per unit attributable to common unitholders
Basic and diluted (in dollars per share)	$ (0.10)	$ 0.07	$ 0.48	$ 0.28
Weighted-average common units outstanding
Basic (in units)	138,082,035	137,863,484	138,013,840	137,780,364
Diluted (in units)	138,082,035	138,838,176	139,120,581	138,792,922
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP | Owned properties
Revenues:
Revenues	$ 177,186	$ 203,156	$ 409,277	$ 427,575
Operating expenses (income):
Operating expenses	85,749	90,763	178,223	182,932
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP | On-campus participating properties
Revenues:
Revenues	4,101	6,396	14,810	17,844
Operating expenses (income):
Operating expenses	3,208	3,806	6,574	7,763
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP | Noncontrolling interests – partially owned properties
Nonoperating income (expenses):
Net loss (income) attributable to noncontrolling interests	2,046	230	1,130	(1,338)
Third-party development services
Revenues:
Contract with customer, revenue	1,290	3,607	3,345	6,778
Third-party development services | AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP
Revenues:
Contract with customer, revenue	1,290	3,607	3,345	6,778
Third-party management services
Revenues:
Contract with customer, revenue	2,668	3,465	6,497	5,776
Third-party management services | AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP
Revenues:
Contract with customer, revenue	2,668	3,465	6,497	5,776
Resident services
Revenues:
Contract with customer, revenue	302	747	1,022	1,529
Resident services | AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP
Revenues:
Contract with customer, revenue	$ 302	$ 747	$ 1,022	$ 1,529