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Long-Term Incentive Plan Units (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 07, 2021
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Capital shares reserved for future issuance (in shares)   1,565,004     1,624,352
Share-based long term incentive plan unit expense   $ 0.3   $ 0.2  
Long-Term Incentive Plan Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grants in Period (in shares)   120,140      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   40,254 17,231    
Director [Member] | Long-Term Incentive Plan Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grants in Period (in shares)   16,264      
Manager [Member] | Long-Term Incentive Plan Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   0 0    
Non Manager [Member] | Long-Term Incentive Plan Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 40,254 40,254 17,231