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Long-term debt: Long-term debt maturities (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Long-term debt:
2022	$ 791
2024	397,005
2026	500,000
Total	$ 897,796

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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