Convertible Note Principal Amount

No definition available.

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Period Type:	instant

- Definition

Number of shares issued for each share of convertible senior notes that is converted.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Liability component of the gross proceeds of Convertible Notes prior to their maturity date.

+ References

No definition available.

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Period Type:	instant

- Definition

Amount of amortization expense attributable to debt issuance costs.

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

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- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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Period Type:	duration

- Definition

Latest date before maturity which the issuer can call the outstanding debt instrument for repayment or conversion to equity, in CCYY-MM-DD format.

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- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

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- Definition

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

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- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

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- Definition

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

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- Definition

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

+ References

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- Definition

Date the debt instrument was issued, in CCYY-MM-DD format.

+ References

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- Definition

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.

+ References

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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- Definition

End date of debt instrument redemption period, in CCYY-MM-DD format.

+ References

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

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- Definition

Description of covenants that limit or prohibit certain actions or activities without the lender's prior consent within a specified period of time or until certain specified targets are achieved for example, reduction of the debt or an increase in net worth to a specified amount).

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

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- Definition

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.

+ References

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- Definition

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

+ References

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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Period Type:	instant

- Definition

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.

+ References

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LONG-TERM DEBT ADDITIONAL INFORMATION (Details) - USD ($)											3 Months Ended	12 Months Ended
	Oct. 15, 2022	Sep. 15, 2021	Mar. 15, 2021	May 21, 2020	Sep. 15, 2019	Sep. 12, 2016	May 16, 2016	May 15, 2016	Oct. 03, 2012	Nov. 15, 2010	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2021	Dec. 14, 2016	Sep. 14, 2016
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage												1.25%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage												0.50%
Debt Instrument, Maturity Date		Sep. 15, 2021
3.25% Convertible Note, Conversion Price												$ 85.39
Debt Issuance Costs ($)												$ 15,556,000	$ 974,000	$ 88,000
3.25% Convertible Senior Notes due 2016 [Member]
Debt Instrument [Line Items]
Debt Conversion, Converted Instrument, Shares Issued							792,406
Debt Conversion, Converted Instrument, Amount							$ 47,900,000
Debt Instrument, Issuance Date										Nov. 15, 2010
Debt Instrument, Maturity Date								May 15, 2016
Debt Instrument, Interest Rate, Stated Percentage												3.25%
3.25% Convertible Note, Conversion Price										$ 42.40
6.125% Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date						Sep. 12, 2016
Debt Instrument, Interest Rate, Stated Percentage												6.125%
Debt Instrument, Redemption Period, End Date					Sep. 15, 2019
1.125% Convertible Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date											Sep. 12, 2016
Debt Instrument, Interest Rate, Stated Percentage															1.125%
Convertible Senior Note, Shares Issued Upon Conversion												1171.13%
Convertible Note Principal Amount			$ 1,000
3.25% Convertible Note, Conversion Price			$ 85.39
3.25% Convertible Senior Notes due 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Call Date, Latest			Mar. 15, 2021
7.75% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date									Oct. 03, 2012
Debt Instrument, Maturity Date	Oct. 15, 2022
Debt Instrument, Interest Rate, Stated Percentage												7.75%
Debt Issuance Costs ($)									$ 11,000,000
Debt Instrument, Call Date, Latest									Oct. 15, 2017
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity ($)												$ 1,000,000,000
Line of Credit Facility, Expiration Date				May 21, 2020
Line of Credit Facility, Remaining Borrowing Capacity												$ 688,300,000
Credit Facility - Restrictive Covenants												The revolving credit facility contains restrictions as to when we can directly or indirectly retire, redeem, repurchase, or prepay in cash any part of the principal of the 2021 Convertible Notes, 2022 Senior Notes, or 2024 Senior Notes. Among other things, the restriction on redemption of the 2021 Convertible Notes requires that immediately after giving effect to any such retirement, redemption, defeasance, repurchase, settlement, or prepayment, the aggregate commitment under the revolving credit facility must exceed the aggregate credit exposure under such facility by at least an amount equal to or greater than 20 percent of such aggregate commitment.
Credit Facility - Covenant Description												The revolving credit facility contains covenants customary for agreements of this type, with the most restrictive being certain financial tests on a quarterly basis. The financial tests, as defined per the revolving credit facility, include requirements to: (a) maintain a minimum current ratio of 1.00:1.00 and (b) not exceed a maximum leverage ratio of 4.00:1.00
Amortization of Debt Issuance Costs												$ 8,800,000		$ 3,600,000
RNG Credit Facility [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount ($)												11,700,000
7.75% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Unamortized Debt Issuance Costs												6,443,000	7,563,000
Senior Notes ($)												$ 500,000,000	$ 500,000,000
First Payment [Member] \| 6.125% Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Frequency of Periodic Payment												March 15
First Payment [Member] \| 1.125% Convertible Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Frequency of Periodic Payment												March 15
First Payment [Member] \| 7.75% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Frequency of Periodic Payment												April 15
Second Payment [Member] \| 6.125% Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Frequency of Periodic Payment												September 15
Second Payment [Member] \| 1.125% Convertible Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Frequency of Periodic Payment												September 15
Second Payment [Member] \| 7.75% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Frequency of Periodic Payment												October 15
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate												2.70%	2.60%
Maximum Borrowing Base [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity ($)												$ 700,000,000
1.125% Convertible Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
3.25% convertible senior notes fair value												200,000,000	$ 0
Liability component of gross proceeds of Convertible Notes												160,500,000
Unamortized Debt Issuance Costs												$ 4,584,000	0			$ 4,800,000
Debt Instrument, Interest Rate, Effective Percentage												5.80%
Share Price												$ 72.58
3.25% Convertible Debt, Equity Component ($)												$ 39,500,000
6.125% Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Unamortized Debt Issuance Costs												7,544,000	0				$ 7,800,000
Senior Notes ($)												$ 400,000,000	$ 0
2024 Senior notes redemption price, prior to September 15, 2019 [Member] \| 6.125% Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage					104.594%
2024 Senior notes redemption price, after September 15, 2019. [Member] \| 6.125% Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage					106.125%