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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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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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No definition available.

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Amount, after accumulated amortization, of debt discount.

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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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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. 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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Debt (Summary Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 30, 2016	Dec. 31, 2015	Dec. 17, 2012	Jun. 30, 2011
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 2,858,000		$ 2,706,000
Debt Instrument, Unamortized Discount	(23,675)		(17,911)
Unamortized Debt Issuance Expense	(15,062)		(20,281)
Long-term Debt, Net	2,819,263		2,667,808
Current portion of long-term debt	222,000		148,000
Long-term debt, net	2,597,263		2,519,808
Term-A Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Net	$ 1,245,175		1,386,869
5.00% Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.00%
Debt Instrument, Unamortized Discount		$ (17,500)
Long-term Debt, Net	$ 981,949
7.75% Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.75%				7.75%
Debt Instrument, Unamortized Discount					$ (14,000)
Long-term Debt, Net			689,910
4.75% Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.75%
Debt Instrument, Unamortized Discount				$ (10,500)
Long-term Debt, Net	$ 592,139		591,029
Senior Notes [Member] \| 5.00% Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	1,000,000		0
Senior Notes [Member] \| 7.75% Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	0		700,000
Senior Notes [Member] \| 4.75% Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	600,000		600,000
Secured Debt [Member] \| Term-A Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 1,258,000		$ 1,406,000