Long Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term Debt and Lease Obligation, Including Current Maturities	$ 982,699	$ 684,656
Finance Lease, Liability	380	564
Current portion of long-term debt	272	12,249
Long-term debt	982,427	672,407
Line of Credit [Member]
Debt Instrument [Line Items]
Long-term Debt	0	140,000
Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	133,865	226,196
Unamortized Debt Issuance Expense	723	1,373
2.625 Percent Convertible Notes Due 2024 \| Convertible Notes Payable [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount		23,404
Unamortized Debt Issuance Expense	631	3,700
Convertible Debt	69,369	317,896
2.250 Percent Convertible Notes Due 2027 \| Convertible Notes Payable [Member]
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense	20,915
Convertible Debt	$ 779,085	$ 0

Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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Amount, after accumulated amortization, of debt discount.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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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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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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