CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Distributions in Excess of Net Income [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2019	$ 373	$ 512,324	$ (6,026)	$ (348,509)	$ 158,162	$ 55,726	$ 213,888
Balance (in shares) at Dec. 31, 2019	37,701,042
Increase (Decrease) in Stockholders' Equity
Redemption and reallocation of noncontrolling interests		11			11	(11)
Redemption and reallocation of noncontrolling interests (in shares)	2,140
Issuance of stock awards, net of forfeitures (in shares)	199,541
Exercise of stock options		73			73		73
Exercise of stock options (in shares)	3,210
Share-based compensation	$ 1	3,725			3,726		3,726
Dividends and distributions				(46,174)	(46,174)	(13,139)	(59,313)
Net income				17,848	17,848	5,140	22,988
Other comprehensive income			(13,132)		(13,132)	(3,782)	(16,914)
Balance at Mar. 31, 2020	$ 374	516,133	(19,158)	(376,835)	120,514	43,934	164,448
Balance (in shares) at Mar. 31, 2020	37,905,933
Balance at Dec. 31, 2019	$ 373	512,324	(6,026)	(348,509)	158,162	55,726	213,888
Balance (in shares) at Dec. 31, 2019	37,701,042
Increase (Decrease) in Stockholders' Equity
Net income							72,208
Balance at Sep. 30, 2020	$ 422	551,227	(22,355)	(439,028)	90,266	12,518	102,784
Balance (in shares) at Sep. 30, 2020	42,766,487
Balance at Mar. 31, 2020	$ 374	516,133	(19,158)	(376,835)	120,514	43,934	164,448
Balance (in shares) at Mar. 31, 2020	37,905,933
Increase (Decrease) in Stockholders' Equity
Redemption and reallocation of noncontrolling interests	$ 46	25,105	(2,594)		22,557	(22,557)
Redemption and reallocation of noncontrolling interests (in shares)	4,620,000
Issuance of stock awards, net of forfeitures (in shares)	(1,185)
Exercise of stock options		99			99		99
Exercise of stock options (in shares)	8,672
Share-based compensation		4,477			4,477		4,477
Dividends and distributions				(51,857)	(51,857)	(7,502)	(59,359)
Net income				20,671	20,671	4,417	25,088
Other comprehensive income			(2,088)		(2,088)	(1,083)	(3,171)
Balance at Jun. 30, 2020	$ 420	545,814	(23,840)	(408,021)	114,373	17,209	131,582
Balance (in shares) at Jun. 30, 2020	42,533,420
Increase (Decrease) in Stockholders' Equity
Redemption and reallocation of noncontrolling interests	$ 2	822	(131)		693	(693)
Redemption and reallocation of noncontrolling interests (in shares)	230,172
Issuance of stock awards, net of forfeitures (in shares)	(5,037)
Exercise of stock options		126			126		126
Exercise of stock options (in shares)	7,932
Share-based compensation		4,465			4,465		4,465
Dividends and distributions				(52,139)	(52,139)	(7,222)	(59,361)
Net income				21,132	21,132	3,000	24,132
Other comprehensive income			1,616		1,616	224	1,840
Balance at Sep. 30, 2020	$ 422	551,227	(22,355)	(439,028)	90,266	12,518	102,784
Balance (in shares) at Sep. 30, 2020	42,766,487
Balance at Dec. 31, 2020	$ 422	555,595	(20,526)	(471,910)	63,581	8,897	72,478
Balance (in shares) at Dec. 31, 2020	42,768,153
Increase (Decrease) in Stockholders' Equity
Redemption and reallocation of noncontrolling interests	$ 1	(447)	(12)		(458)	458
Redemption and reallocation of noncontrolling interests (in shares)	1,300
Issuance of stock awards, net of forfeitures (in shares)	212,419
Exercise of stock options		41			41		41
Exercise of stock options (in shares)	2,694
Share-based compensation	$ 1	4,588			4,589		4,589
Dividends and distributions				(52,852)	(52,852)	(7,276)	(60,128)
Net income				21,868	21,868	3,047	24,915
Other comprehensive income			6,075		6,075	847	6,922
Balance at Mar. 31, 2021	$ 424	559,777	(14,463)	(502,894)	42,844	5,973	48,817
Balance (in shares) at Mar. 31, 2021	42,984,566
Balance at Dec. 31, 2020	$ 422	555,595	(20,526)	(471,910)	63,581	8,897	72,478
Balance (in shares) at Dec. 31, 2020	42,768,153
Increase (Decrease) in Stockholders' Equity
Net income							77,508
Balance at Sep. 30, 2021	$ 436	570,746	(12,261)	(567,771)	(8,850)	(955)	(9,805)
Balance (in shares) at Sep. 30, 2021	44,201,031
Balance at Mar. 31, 2021	$ 424	559,777	(14,463)	(502,894)	42,844	5,973	48,817
Balance (in shares) at Mar. 31, 2021	42,984,566
Increase (Decrease) in Stockholders' Equity
Redemption and reallocation of noncontrolling interests	$ 12	1,612	(409)		1,215	(1,215)
Redemption and reallocation of noncontrolling interests (in shares)	1,200,000
Issuance of stock awards, net of forfeitures (in shares)	18,066
Exercise of stock options		69			69		69
Exercise of stock options (in shares)	2,888
Share-based compensation		4,912			4,912		4,912
Dividends and distributions				(55,806)	(55,806)	(5,989)	(61,795)
Net income				25,249	25,249	3,226	28,475
Other comprehensive income			1,044		1,044	113	1,157
Balance at Jun. 30, 2021	$ 436	566,370	(13,828)	(533,451)	19,527	2,108	21,635
Balance (in shares) at Jun. 30, 2021	44,205,520
Increase (Decrease) in Stockholders' Equity
Redemption and reallocation of noncontrolling interests		(417)	(1)		(418)	418
Issuance of stock awards, net of forfeitures (in shares)	(4,489)
Share-based compensation		4,793			4,793		4,793
Dividends and distributions				(56,099)	(56,099)	(5,989)	(62,088)
Net income				21,779	21,779	2,339	24,118
Other comprehensive income			1,568		1,568	169	1,737
Balance at Sep. 30, 2021	$ 436	$ 570,746	$ (12,261)	$ (567,771)	$ (8,850)	$ (955)	$ (9,805)
Balance (in shares) at Sep. 30, 2021	44,201,031

CoreSite Realty Corp 10-Q