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Finance and Operating Leases (Details) - USD ($)
1 Months Ended
Mar. 31, 2020
Feb. 28, 2019
Jan. 27, 2020
Jul. 01, 2019
Jun. 30, 2019
Finance and Operating Leases          
Finance lease liability $ 23,253,000        
Finance lease right-of-use assets 23,900,000       $ 19,800,000
Purchase option $ 1        
Incremental borrowing rate used as discount rate     2.55% 3.86%  
Minimum          
Finance and Operating Leases          
Interest rate on finance lease (as a percent) 1.52%        
Finance lease term 1 year        
Maximum          
Finance and Operating Leases          
Interest rate on finance lease (as a percent) 3.87%        
Finance lease term 3 years        
PNC          
Finance and Operating Leases          
Finance lease term 36 months        
Purchase option $ 1        
BALC          
Finance and Operating Leases          
Available line of credit $ 25,000,000.0 $ 25,000,000.0      
Finance lease term   12 months      
Purchase option   $ 1      
BALC | LIBOR          
Finance and Operating Leases          
Interest rate spread added to base rate (as a percent) 0.75% 1.25%      
BALC | Minimum          
Finance and Operating Leases          
Fixed interest rate (as a percent)   1.52%      
BALC | Maximum          
Finance and Operating Leases          
Fixed interest rate (as a percent)   3.58%