CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Third-party development services	$ 675	$ 2,121	$ 1,131	$ 3,156
Third-party management services	2,288	2,253	4,902	4,663
Resident services	718	713	1,597	1,515
Total revenues	179,008	185,983	371,946	385,978
Operating expenses:
Third-party development and management services	3,827	3,560	7,910	7,298
General and administrative	9,782	6,126	16,516	11,435
Depreciation and amortization	55,943	53,703	108,266	107,419
Ground/facility leases	2,465	2,467	4,822	4,771
Provision for real estate impairment	15,317	0	15,317	0
Total operating expenses	166,398	146,877	310,117	293,837
Operating income	12,610	39,106	61,829	92,141
Nonoperating income and (expenses):
Interest income	1,232	1,475	2,464	2,754
Interest expense	(14,573)	(20,119)	(29,290)	(42,746)
Amortization of deferred financing costs	(1,023)	(1,352)	(2,051)	(3,894)
(Loss) gain from disposition of real estate	(632)	0	(632)	17,409
Total nonoperating expense	(14,996)	(19,996)	(29,509)	(26,477)
(Loss) income before income taxes	(2,386)	19,110	32,320	65,664
Income tax provision	(267)	(345)	(524)	(690)
Net income	(2,653)	18,765	31,796	64,974
Net income attributable to noncontrolling interests	(109)	(327)	(508)	(949)
Net (loss) income attributable to ACC, Inc. and Subsidiaries common stockholders	(2,762)	18,438	31,288	64,025
Other comprehensive income (loss)
Change in fair value of interest rate swaps and other	155	(23)	639	(1,433)
Comprehensive (loss) income	$ (2,607)	$ 18,415	$ 31,927	$ 62,592
Net (loss) income per share attributable to ACC, Inc. and Subsidiaries common stockholders
Basic and Diluted (in dollars per share)	$ (0.02)	$ 0.14
Weighted-average common shares outstanding
Basic (in shares)	134,614,418	130,456,923	133,837,748	126,951,454
Diluted (in shares)	134,614,418	131,240,667	134,745,192	127,753,492
Weighted-average common units outstanding
Distributions declared per common share (in dollars per share)	$ 0.44	$ 0.42	$ 0.86	$ 0.82
Redeemable noncontrolling interests
Nonoperating income and (expenses):
Net income attributable to noncontrolling interests	$ (12)	$ (223)	$ (306)	$ (741)
Wholly-owned properties
Revenues:
Operating lease revenue	169,156	174,682	347,987	360,384
Operating expenses:
Wholly-owned properties and On-campus participating properties	75,172	77,722	150,129	156,573
On-campus participating properties
Revenues:
Operating lease revenue	6,171	6,214	16,329	16,260
Operating expenses:
Wholly-owned properties and On-campus participating properties	3,892	3,299	7,157	6,341
Partially owned properties
Nonoperating income and (expenses):
Net income attributable to noncontrolling interests	(97)	(104)	(202)	(208)
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP, L.P.
Revenues:
Third-party development services	675	2,121	1,131	3,156
Third-party management services	2,288	2,253	4,902	4,663
Resident services	718	713	1,597	1,515
Total revenues	179,008	185,983	371,946	385,978
Operating expenses:
Third-party development and management services	3,827	3,560	7,910	7,298
General and administrative	9,782	6,126	16,516	11,435
Depreciation and amortization	55,943	53,703	108,266	107,419
Ground/facility leases	2,465	2,467	4,822	4,771
Provision for real estate impairment	15,317	0	15,317	0
Total operating expenses	166,398	146,877	310,117	293,837
Operating income	12,610	39,106	61,829	92,141
Nonoperating income and (expenses):
Interest income	1,232	1,475	2,464	2,754
Interest expense	(14,573)	(20,119)	(29,290)	(42,746)
Amortization of deferred financing costs	(1,023)	(1,352)	(2,051)	(3,894)
(Loss) gain from disposition of real estate	(632)	0	(632)	17,409
Total nonoperating expense	(14,996)	(19,996)	(29,509)	(26,477)
(Loss) income before income taxes	(2,386)	19,110	32,320	65,664
Income tax provision	(267)	(345)	(524)	(690)
Net income	(2,653)	18,765	31,796	64,974
Net (loss) income attributable to ACC, Inc. and Subsidiaries common stockholders	(2,750)	18,661	31,594	64,766
Series A preferred unit distributions	(31)	(37)	(62)	(79)
Net (loss) income attributable to common unitholders	(2,781)	18,624	31,532	64,687
Other comprehensive income (loss)
Change in fair value of interest rate swaps and other	155	(23)	639	(1,433)
Comprehensive (loss) income	$ (2,626)	$ 18,601	$ 32,171	$ 63,254
Net (loss) income per share attributable to ACC, Inc. and Subsidiaries common stockholders
Basic and Diluted (in dollars per share)			$ 0.23	$ 0.50
Net (loss) income per unit attributable to common unitholders
Basic and Diluted (in dollars per unit)	$ (0.02)	$ 0.14	$ 0.23	$ 0.50
Weighted-average common units outstanding
Basic (in units)	135,643,549	131,760,705	134,866,879	128,258,368
Diluted (in units)	135,643,549	132,544,449	135,774,323	129,060,406
Distributions declared per common unit (in dollars per unit)	$ 0.44	$ 0.42	$ 0.86	$ 0.82
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP, L.P. | Wholly-owned properties
Revenues:
Operating lease revenue	$ 169,156	$ 174,682	$ 347,987	$ 360,384
Operating expenses:
Wholly-owned properties and On-campus participating properties	75,172	77,722	150,129	156,573
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP, L.P. | On-campus participating properties
Revenues:
Operating lease revenue	6,171	6,214	16,329	16,260
Operating expenses:
Wholly-owned properties and On-campus participating properties	3,892	3,299	7,157	6,341
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP, L.P. | Partially owned properties
Nonoperating income and (expenses):
Net income attributable to noncontrolling interests	$ (97)	$ (104)	$ (202)	$ (208)