Fair Value of Instruments and Derivatives Fair Value of Derivatives and Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of Interest Rate Derivatives [Table Text Block]

As of March 31, 2018, the Company had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk:

Interest Rate Derivative	Number of Instruments	Notional Amount
Interest Rate Cap	1	$	25,000,000
Interest Rate Swaps(1)	12	$	550,000,000

Derivative Instruments, Gain (Loss) [Table Text Block]

Tabular Disclosure of the Effect of Derivative Instruments on the Condensed Consolidated Statements of Operations

The tables below present the effect of the Company's derivative financial instruments on the Condensed Consolidated Statements of Operations for the three months ended March 31, 2018 and 2017 (dollars in thousands):

Derivatives in Cash Flow Hedging Relationships	Amount of Gain Recognized in OCI on Derivative (Effective Portion)				Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain (Loss) Reclassified from Accumulated OCI into Interest Expense (Effective Portion)
Three months ended March 31,	2018		2017			2018		2017
Interest rate contracts	$	832	$	2,520	Interest Expense	$	193	$	(672	)

Derivatives Not Designated as Hedging Instruments	Location of (Loss) Gain Recognized in Income on Derivative	Amount of (Loss) Gain Recognized in Earnings on Derivative
For the three months ended March 31,		2018			2017
Preferred stock embedded derivative	Non-operating (expense) income	$	(2,644	)	$	2,353

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income

Changes in Accumulated Other Comprehensive Income

The Company's other comprehensive income consists entirely of gains and losses attributable to the effective portion of its cash flow hedges. The table below reflects the change in the balance for the three months ended March 31, 2018 and 2017 (dollars in thousands):

	Affected Line Item in the Condensed Consolidated Statements Of Operations	Three months ended March 31,
		2018			2017
Beginning balance		$	2,157		$	1,144
Other comprehensive income before reclassifications		832			2,520
Amounts reclassified from Accumulated other comprehensive income - interest rate contracts	Interest expense	(193		)	672
Net current period other comprehensive income attributable to noncontrolling interests		(29		)	(113		)
Cumulative adjustment due to adoption of ASU 2017-12		233			—
Change in Accumulated other comprehensive income attributable to MAA		843			3,079
Ending balance		$	3,000		$	4,223