MAA Equity (Tables)

9 Months Ended

Sep. 30, 2018

MAA Equity [Abstract]

Shareholders' Equity [Table Text Block]

	Mid-America Apartment Communities, Inc. Shareholders' Equity
	Preferred Stock		Common Stock		Additional Paid-In Capital			Accumulated Distributions in Excess of Net Income			Accumulated Other Comprehensive Income			Noncontrolling Interests - Operating Partnership			Noncontrolling Interest - Consolidated Real Estate Entity		Total Equity
EQUITY BALANCE DECEMBER 31, 2016	$	9	$	1,133	$	7,109,012		$	(707,479	)	$	1,144		$	235,976		$	2,306	$	6,642,101
Net income attributable to controlling interests	—		—		—			204,929			—			7,600			—		212,529
Other comprehensive loss - derivative instruments	—		—		—			—			(354		)	(14		)	—		(368		)
Issuance and registration of common shares	—		1		153			—			—			—			—		154
Issuance and registration of preferred shares	—		—		2,007			—			—			—			—		2,007
Shares repurchased and retired	—		—		(4,782		)	—			—			—			—		(4,782		)
Exercise of stock options	—		—		218						—			—					218
Shares issued in exchange for common units	—		—		1,133			—			—			(1,133		)	—		—
Shares issued in exchange for redeemable stock	—		—		1,482			—			—			—			—		1,482
Redeemable stock fair market value adjustment	—		—		—			(870		)	—			—			—		(870		)
Adjustment for noncontrolling interests in Operating Partnership	—		—		54			—			—			(54		)	—		—
Amortization of unearned compensation	—		—		8,552			(114		)	—			—			—		8,438
Dividends on preferred stock	—		—		—			(2,766		)	—			—			—		(2,766		)
Dividends on common stock	—		—		—			(296,535		)	—			—			—		(296,535		)
Dividends on noncontrolling interests units	—		—		—			—			—			(10,982		)	—		(10,982		)
EQUITY BALANCE SEPTEMBER 30, 2017	$	9	$	1,134	$	7,117,829		$	(802,835	)	$	790		$	231,393		$	2,306	$	6,550,626

Changes in total equity and its components for the nine months endedSeptember 30, 2018 and 2017 were as follows (dollars in thousands):

	Mid-America Apartment Communities, Inc. Shareholders' Equity
	Preferred Stock		Common Stock		Additional Paid-In Capital			Accumulated Distributions in Excess of Net Income			Accumulated Other Comprehensive Income		Noncontrolling Interests - Operating Partnership			Noncontrolling Interest - Consolidated Real Estate Entity		Total Equity
EQUITY BALANCE DECEMBER 31, 2017	$	9	$	1,134	$	7,121,112		$	(784,500	)	$	2,157	$	231,676		$	2,306	$	6,573,894
Net income attributable to controlling interests	—		—		—			161,617			—		5,888			—		167,505
Other comprehensive income - derivative instruments	—		—		—			—			9,166		335			—		9,501
Issuance and registration of common shares	—		1		(272		)	—			—		—			—		(271		)
Shares repurchased and retired	—		—		(2,912		)	—			—		—			—		(2,912		)
Exercise of stock options	—		—		916			—			—		—			—		916
Shares issued in exchange for common units	—		1		4,282			—			—		(4,283		)	—		—
Shares issued in exchange for redeemable stock	—		—		1,915			—			—		—			—		1,915
Redeemable stock fair market value adjustment	—		—		—			121			—		—			—		121
Adjustment for noncontrolling interests in Operating Partnership	—		—		561			—			—		(561		)	—		—
Cumulative adjustment due to adoption of ASU 2017-12	—		—		—			(233		)	233		—			—		—
Amortization of unearned compensation	—		—		9,877			—			—		—			—		9,877
Dividends on preferred stock	—		—		—			(2,766		)	—		—			—		(2,766		)
Dividends on common stock	—		—		—			(315,012		)	—		—			—		(315,012		)
Dividends on noncontrolling interests units	—		—		—			—			—		(11,214		)	—		(11,214		)
EQUITY BALANCE SEPTEMBER 30, 2018	$	9	$	1,136	$	7,135,479		$	(940,773	)	$	11,556	$	221,841		$	2,306	$	6,431,554