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Senior Notes (Details) - Senior Notes [Member] - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Feb. 17, 2021
Senior Notes [Line Items]    
Initial borrowing in senior notes $ 450,000 $ 450,000
Unamortized Debt Issuance Expense   $ 15,700
Debt Instrument, Redemption Price, Percentage 106.375%