XML 67 R47.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Commitments and Contingencies (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
community
property
multiplier
Lease
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Commitments and Contingencies Disclosure [Line Items]      
Finance Lease, Right-of-Use Asset $ 21,898    
Employment Agreements and Arrangements [Abstract]      
Proceeds from legal recoveries $ 6,292 $ 946 $ 6,118
Lease Obligations [Abstract]      
Number of office leases | Lease 17    
Cost related to operating lease $ 14,371 21,788 23,431
Finance Lease, Liability 20,207    
Right of use lease assets 103,063    
Payments to acquire other real estate 420,517 338,620 462,317
Gain (loss) on other real estate transactions, net 439 345 (10,907)
Operating Lease, Liability $ 120,261    
Properties on Land Subject to Land Leases      
Lease Obligations [Abstract]      
Number of apartment communities | community 11    
Number of operating apartment communities under construction | community 1    
Number of commercial properties owned | property 2    
Number of leased properties with purchase options | property 5    
Assets Held under Operating Leases [Member]      
Lease Obligations [Abstract]      
Number of apartment communities | community 10    
Assets Held under Finance Leases [Member]      
Commitments and Contingencies Disclosure [Line Items]      
Number Of Finance Leases For Parking Garage Adjacent To Development Community | Lease 1    
Lease Obligations [Abstract]      
Number of apartment communities | community 1    
Number Of Finance Leases For Parking Garages Adjacent To Communities | Lease 2    
Number Of Finance Leases For Parking Garage Adjacent To Operating Community | Lease 1    
Restricted stock and stock options      
Employment Agreements and Arrangements [Abstract]      
Retirement age (in years) 50 years    
Period of the non-compete agreement (in years) 1 year    
Restricted stock and stock options | Minimum      
Employment Agreements and Arrangements [Abstract]      
Service period (in years) 10 years    
Employee's age at retirement plus years of employment (in years) 70 years    
Share Based Compensation Arrangement by Share Based Payment Award Requisite Period of Written Notice for Retirement 6 months    
Restricted stock and stock options | Maximum      
Employment Agreements and Arrangements [Abstract]      
Options exercise period upon termination without cause or retirement (in months) 12 months    
Officer Severance Program | Vice President and Senior Vice President      
Employment Agreements and Arrangements [Abstract]      
Compensation multiplier | multiplier 1    
Officer Severance Program | Executive Vice Presidents      
Employment Agreements and Arrangements [Abstract]      
Compensation multiplier | multiplier 2    
Officer Severance Program | Chief Executive Officer      
Employment Agreements and Arrangements [Abstract]      
Compensation multiplier | multiplier 3    
Officer Severance Program | Maximum      
Employment Agreements and Arrangements [Abstract]      
Termination period following a sale event (in years) 18 months    
Former Development Right [Member]      
Employment Agreements and Arrangements [Abstract]      
Proceeds from legal recoveries $ 3,126    
Avalon Towers [Member]      
Employment Agreements and Arrangements [Abstract]      
Proceeds from legal recoveries 2,237    
Archstone Toscano      
Employment Agreements and Arrangements [Abstract]      
Proceeds from legal recoveries   $ 554  
Memorial Heights Villages      
Employment Agreements and Arrangements [Abstract]      
Proceeds from legal recoveries     $ 5,438
Avalon Morningside Park      
Lease Obligations [Abstract]      
Payments to acquire other real estate 95,000    
Gain (loss) on other real estate transactions, net 11,153    
Avalon at Assembly Row and AVA Somerville      
Lease Obligations [Abstract]      
Repayments of long-term capital lease obligations $ 17,285