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Share-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended 24 Months Ended 33 Months Ended
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Sep. 30, 2020
Jan. 04, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation charges $ 4.6   $ 3.4   $ 13.3 $ 12.2      
Accelerated equity award vesting   $ 3.1       3.1      
Unrecognized stock-based compensation expense $ 25.3       $ 25.3     $ 25.3  
Unrecognized stock-based compensation expense, period for recognition         1 year 10 months 24 days        
Accelerated equity award vesting (in shares)       100,000          
Compensation from modification of awards       $ 2.9          
Accelerated compensation from executive termination       $ 0.2          
Fair value at grant date of stock option award         $ 0.6 0.4      
Intrinsic value of options exercised         $ 8.2 $ 27.5      
Time-Based Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares)         194,981        
Market-Based Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares)         108,810        
Restricted stock units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Weighted average grant date fair value, awards granted (in USD per share)         $ 31.06        
Weighted average grant date fair value, awards vested (in USD per share)         20.93        
Weighted average grant date fair value, awards forfeited (in USD per share)         26.13        
Weighted average grant date fair value, non-vested awards (in USD per share) $ 24.32       $ 24.32   $ 22.50 $ 24.32  
OP units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Aggregate fair value of awards granted         $ 8.3        
2010 Equity Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares authorized (in shares) 3,849,976       3,849,976     3,849,976  
Americold Realty Trust 2017 Equity Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares authorized (in shares)                 9,000,000
Dividends accrued on dividend equivalents on unvested units payable             $ 1.1 $ 1.8  
Trustees | Time-Based Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares)         8,517        
Vesting period         1 year        
Trustees | Time-Based Restricted Stock Units, Awarded for Initial Public Offering                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares)           12,285      
Vesting period           1 year      
Trustees | Time-based Restricted Stock Units, Awarded As Part of Annual Compensation                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares)           5,982      
Vesting period           1 year      
Trustees | Restricted stock units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares)     5,982   8,517 18,267      
Vesting period     1 year   1 year 1 year      
Trustees | OP units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares)     20,190   16,325 20,190      
Vesting period     1 year   1 year 1 year      
Employees | Time-Based Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares)         186,464 257,867      
Employees | Market-Based Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares)         108,810 243,168      
Vesting period         3 years 3 years      
Employees | Restricted stock units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares) 10,608   10,489   295,274 501,035      
Employees | OP units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of awards granted (in shares)         255,720        
Employees | Minimum | Time-Based Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period         1 year 1 year      
Employees | Minimum | Restricted stock units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period 1 year   1 year   1 year 1 year      
Employees | Minimum | OP units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period         1 year        
Employees | Maximum | Time-Based Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period         3 years 3 years      
Employees | Maximum | Restricted stock units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period 3 years   3 years   3 years 3 years      
Employees | Maximum | OP units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period         3 years