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Long-Term Debt (Tables)
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Summary of Long-Term Debt
Long-term debt consisted of the following:

As of December 31,
(in thousands)20212020
Fixed-rate debt and finance lease obligations due through 2032$827,382 $525,240 
Variable-rate debt due through 2029915,157 1,133,771 
Total long-term debt and finance lease obligations, net of related costs1,742,539 1,659,011 
Less current maturities, net of related costs130,053 217,234 
Long-term debt and finance lease obligations, net of current maturities and related costs$1,612,486 $1,441,777 
Weighted average fixed-interest rate on debt5.8 %5.7 %
Weighted average variable-interest rate on debt2.5 %2.4 %
Schedule of Maturities of Long-term Debt [Table Text Block]
Maturities of long-term debt as of December 31, 2021, for the next five years and thereafter, in the aggregate, are:

(in thousands)As of December 31, 2021
2022$130,053 
2023130,723 
2024800,849 
2025107,434 
2026100,776 
Thereafter472,704 
Total debt and finance lease obligations, net of related costs$1,742,539