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- Definition

Convertible note hedge shares

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Debt Instrument, Covenant Limitation on Common Stock Repurchase Amount

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line of credit, increase in maximum borrowing capacity

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- Definition

Note conversion obligation fair value

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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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Dividend or interest rate associated with the financial instrument issued in exchange for the original debt being converted in a noncash or part noncash transaction. Noncash are transactions that affect recognized assets or liabilities but that do not result in cash receipts or cash payments. Part noncash refers to that portion of the transaction not resulting in cash receipts or cash payments.

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The average effective interest rate during the reporting period.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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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 cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

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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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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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Debt Obligations (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Apr. 13, 2021	Jan. 28, 2020	May 10, 2018	Sep. 25, 2017
Debt Instrument [Line Items]
Long term obligations	$ 1,299,363	$ 1,479,077
Unsecured Debt	697,162	493,376
Proceeds from Issuance of Unsecured Debt	207,400	500,000	$ 0
Convertible Debt	231,646	222,391
Aircraft loans [Member]
Debt Instrument [Line Items]
Debt Issuance Costs, Line of Credit Arrangements, Net		7,000
Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Issuance Costs, Line of Credit Arrangements, Net	7,800	6,600
Unsubordinated term loan and Revolving credit facility [Member]
Debt Instrument [Line Items]
Maximum amount of common stock authorized for repurchase	100,000
Unsubordinated term loan [Member]
Debt Instrument [Line Items]
Long term obligations	0	612,169
Revolving credit facility [Member]
Debt Instrument [Line Items]
Long term obligations	360,000	140,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 250,000
Variable interest rate	1.11%
Credit facility, revolving credit loan, remaining borrowing capacity	$ 424,700
line of credit, increase in maximum borrowing capacity	800,000	600,000
Bonds [Member]
Debt Instrument [Line Items]
Unsecured Debt				$ 200,000	$ 500,000
Debt Instrument, Interest Rate, Stated Percentage					4.75%
Proceeds from Issuance of Unsecured Debt	205,500	495,000
Convertible Debt [Member]
Debt Instrument [Line Items]
Convertible Debt	$ 258,750	258,750					$ 258,800
Debt Conversion, Converted Instrument, Rate	1.125%
Debt Instrument, Interest Rate, Effective Percentage	5.15%
Proceeds from Convertible Debt			$ 252,300
Convertible note hedge shares							8,100
Warrants and Rights Outstanding	$ 38,500
Unamortized Debt Issuance Expense	(2,889)	(3,894)
Debt Instrument, Unamortized Discount	$ (24,215)	$ (32,465)
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Debt Instrument [Line Items]
Note conversion obligation fair value						$ (51,300)	$ (57,400)
Convertible note hedge fair value						$ 50,600	$ 56,100