XML 76 R61.htm IDEA: XBRL DOCUMENT v3.6.0.2
Fair Value (Details 3)
$ in Thousands
Dec. 31, 2016
USD ($)
derivative
Dec. 31, 2015
USD ($)
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Financial Instruments Measured/Discussed at Fair Value    
DownREIT units $ (1,329) $ (1,381)
Total (4,219,956) (3,669,798)
Recurring basis | Significant Other Observable Inputs (Level 2)    
Financial Instruments Measured/Discussed at Fair Value    
Total (2,729,606) (2,694,888)
Recurring basis | Significant Unobservable Inputs (Level 3)    
Financial Instruments Measured/Discussed at Fair Value    
Total (6,002) (8,181)
Recurring basis | Significant Unobservable Inputs (Level 3) | Puts    
Financial Instruments Measured/Discussed at Fair Value    
Fair value of remaining outstanding Puts $ (6,002) (8,181)
Cash Flow Hedges Interest Rate Caps    
Financial Instruments Measured/Discussed at Fair Value    
Derivative, Number of Instruments Held | derivative 11  
Cash Flow Hedges Interest Rate Caps | Recurring basis | Significant Other Observable Inputs (Level 2) | Interest Rate Caps    
Financial Instruments Measured/Discussed at Fair Value    
Derivative assets $ 2 5
Total Fair Value | Recurring basis    
Financial Instruments Measured/Discussed at Fair Value    
DownREIT units (1,329) (1,381)
Total (6,955,564) (6,372,867)
Total Fair Value | Recurring basis | Puts    
Financial Instruments Measured/Discussed at Fair Value    
Fair value of remaining outstanding Puts (6,002) (8,181)
Total Fair Value | Cash Flow Hedges Interest Rate Caps | Recurring basis | Interest Rate Caps    
Financial Instruments Measured/Discussed at Fair Value    
Derivative assets 2 5
Total Fair Value | Cash Flow Hedges Interest Rate Caps | Recurring basis | Interest Rate Swap [Member]    
Financial Instruments Measured/Discussed at Fair Value    
Derivative assets $ 14,775 5,422
Non-designated Hedges Interest Rate Caps    
Financial Instruments Measured/Discussed at Fair Value    
Derivative, Number of Instruments Held | derivative 15  
Non-designated Hedges Interest Rate Caps | Recurring basis | Significant Other Observable Inputs (Level 2) | Interest Rate Caps    
Financial Instruments Measured/Discussed at Fair Value    
Derivative assets $ 79 26
Non-designated Hedges Interest Rate Caps | Total Fair Value | Recurring basis | Interest Rate Caps    
Financial Instruments Measured/Discussed at Fair Value    
Derivative assets 79 26
Secured Debt and Variable Rate Unsecured Term Loan [Member] | Recurring basis | Significant Other Observable Inputs (Level 2)    
Financial Instruments Measured/Discussed at Fair Value    
Indebtedness (2,744,462) (2,700,341)
Secured Debt and Variable Rate Unsecured Term Loan [Member] | Total Fair Value | Recurring basis    
Financial Instruments Measured/Discussed at Fair Value    
Indebtedness (2,744,462) (2,700,341)
Unsecured notes | Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Financial Instruments Measured/Discussed at Fair Value    
Indebtedness (4,218,627) (3,668,417)
Unsecured notes | Total Fair Value | Recurring basis    
Financial Instruments Measured/Discussed at Fair Value    
Indebtedness $ (4,218,627) $ (3,668,417)