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Subsequent Event (Details)
ft² in Thousands, $ in Thousands
Apr. 01, 2020
USD ($)
Mar. 19, 2020
USD ($)
Mar. 24, 2020
GBP (£)
Mar. 19, 2020
GBP (£)
Feb. 10, 2020
ft²
option
Feb. 01, 2020
USD ($)
Feb. 02, 2019
USD ($)
Subsequent Event [Line Items]              
Carrying amount           $ 14,393 $ 65,743
U.S. Credit Facility | Subsequent Event              
Subsequent Event [Line Items]              
Amount borrowed $ 34,300 $ 150,000          
Available liquidity $ 50,000            
Revolving Credit Facility | U.K. A&R Agreement | Subsequent Event              
Subsequent Event [Line Items]              
Aggregate principal amount of credit facility | £       £ 19,000,000.0      
Stated interest rate       2.20%      
Carrying amount | £     £ 19,000,000.0        
UK Credit Facility | U.K. A&R Agreement | Subsequent Event              
Subsequent Event [Line Items]              
Interest coverage covenant minimum level   4.50          
Interest coverage covenant maximum level   1.75          
Nashville, Tennessee | Subsequent Event              
Subsequent Event [Line Items]              
Area of property leased | ft²         199    
Lease term         15 years    
Renewal options | option         2    
Renewal term         5 years