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Senior Notes (Interest Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Debt Instrument [Line Items]        
Amortization of debt issuance costs     $ 253 $ 345
Senior Note Two        
Debt Instrument [Line Items]        
Accretion of debt discount, net of debt premium on senior notes $ 0 $ 27    
Senior Notes        
Debt Instrument [Line Items]        
Acquisition debt imputed interest expense 4,230 6,642 8,480 13,267
Amortization of debt issuance costs 35 53 69 127
Senior Notes | Senior Note Two        
Debt Instrument [Line Items]        
Accretion of debt discount, net of debt premium on senior notes     0 85
Senior Notes | Senior Note One        
Debt Instrument [Line Items]        
Accretion of debt discount, net of debt premium on senior notes $ 122 $ 128 $ 243 $ 266