XML 121 R108.htm IDEA: XBRL DOCUMENT v3.21.2
Long-Term Debt - Senior Notes Net Interest Expense (Details) - Senior Notes - 6.125% Senior Notes - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Interest Expense and Amortization of Debt Issue Costs        
Interest expense $ 8,715 $ 8,697 $ 17,426 $ 17,390
Debt issue cost amortization 321 321 642 642
Debt discount amortization 293 275 582 546
Total $ 9,329 $ 9,293 $ 18,650 $ 18,578