Cash Interest Payments, Expected Payments in Year Five

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Cash Interest Payments, Expected Payments in Year Four

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Cash Interest Payments, Expected Payments in Year One

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- Definition

Cash Interest Payments, Expected Payments in Year Six and Thereafter

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No definition available.

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Cash Interest Payments, Expected Payments in Year Three

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Cash Interest Payments, Expected Payments in Year Two

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- Definition

The current portion of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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No definition available.

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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 equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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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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The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Weighted average interest rate of debt outstanding.

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Gross amount of debt extinguished.

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No definition available.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The amount of cash paid for interest during the period.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of increase (decrease) of the credit facility.

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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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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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Amount of long-term debt, after unamortized discount or premium, scheduled 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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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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The total amount due within more than 12 month, or the operating cycle if longer, on all notes payable to banks paid on an installment. This can include the amount of any loans from the applicant firm. This does not, however, include any mortgage balances.

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Including the current and noncurrent portions, the carrying value of notes payable which were initially due after one year or beyond the normal operating cycle, if longer, and which are not otherwise defined in the taxonomy.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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No definition available.

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The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The cash outflow for the payment of other borrowing not otherwise defined in the taxonomy.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

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Debt Level 4 (Details) (USD $)	3 Months Ended	12 Months Ended
Debt Level 4 (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Line of Credit Facility, Increase (Decrease), Net	$ 110,000,000	$ 95,000,000
Repayments of Long-term Capital Lease Obligations		29,380,000	26,280,000	25,760,000
Repayments of Debt		993,400,000us-gaap_RepaymentsOfDebt	31,800,000us-gaap_RepaymentsOfDebt	206,600,000us-gaap_RepaymentsOfDebt
Repayments of Long-term Debt		230,561,000us-gaap_RepaymentsOfLongTermDebt	90,466,000us-gaap_RepaymentsOfLongTermDebt	607,000us-gaap_RepaymentsOfLongTermDebt
Repayments of Other Debt		500,000us-gaap_RepaymentsOfOtherDebt	600,000us-gaap_RepaymentsOfOtherDebt
(Losses) gains on early extinguishment of debt, net		(29,158,000)	468,000	(22,706,000)
Write off of Deferred Debt Issuance Cost				1,300,000
Notes Payable to Bank, Noncurrent		370,000,000us-gaap_NotesPayableToBankNoncurrent	600,000,000us-gaap_NotesPayableToBankNoncurrent
Bank credit facility due March 2016			86,600,000us-gaap_LineOfCredit
Total debt		3,054,725,000us-gaap_LongTermDebt	3,301,910,000us-gaap_LongTermDebt
Current maturities of long-term debt		91,584,000	153,738,000
Debt instrument, unamortized discount (premium), net, current portion		653,000	(22,624,000)
Less current maturities		90,931,000us-gaap_LongTermDebtCurrent	176,362,000us-gaap_LongTermDebtCurrent
Total long-term debt		2,963,794,000us-gaap_LongTermDebtNoncurrent	3,125,548,000us-gaap_LongTermDebtNoncurrent
Debt, Weighted Average Interest Rate		5.21%us-gaap_DebtWeightedAverageInterestRate	5.25%us-gaap_DebtWeightedAverageInterestRate
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		75.00%	76.00%
2012		90,931,000
2013		223,449,000
2014		315,414,000
2015		858,277,000
2016		9,003,000
2017 and thereafter		1,557,651,000
Line of Credit Facility, Maximum Borrowing Capacity		500,000,000
Letters of Credit, Maximum Borrowing Capacity		31,600,000		175,000,000
Interest Paid		175,327,000us-gaap_InterestPaid	125,022,000us-gaap_InterestPaid	131,723,000us-gaap_InterestPaid
Payments in 2012		154,408,000
Payments in 2013		144,134,000
Payments in 2014		128,986,000
Payments in 2015		114,305,000
Payments in 2016		96,830,000
Payments in 2017 and thereafter		324,075,000
Debt Instrument, Unamortized Premium				21,400,000
July 2014 [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount			107,900,000
Repayments of Debt		86,400,000
Repayments of Long-term Debt		21,700,000
October 2014 [Member]
Debt Instrument [Line Items]
Repayments of Debt				180,700,000
April 2015 [Member]
Debt Instrument [Line Items]
Repayments of Debt		136,500,000
July 2016 [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount			59,100,000
Repayments of Debt		45,000,000
Repayments of Long-term Debt		14,200,000
Convertible Debt			46,279,000
April 2019 [Member]
Debt Instrument [Line Items]
Repayments of Debt		200,000,000
Repayments of Long-term Debt		9,100,000
May 2019 [Member]
Debt Instrument [Line Items]
Repayments of Debt		250,000,000
July 2018 [Member]
Debt Instrument [Line Items]
Repayments of Debt		230,000,000
Discount (premium) [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount			167,000,000
Unsecured Debt [Member]
Debt Instrument [Line Items]
Unamortized pricing discounts and other		(2,905,000)	42,084,000
Unsecured Debt [Member] \| February 2013 [Member]
Debt Instrument [Line Items]
Senior Notes			4,800,000
Unsecured Debt [Member] \| July 2014 [Member]
Debt Instrument [Line Items]
Convertible Debt		0	86,416,000
Unsecured Debt [Member] \| April 2015 [Member]
Debt Instrument [Line Items]
Senior Notes		0	136,465,000
Unsecured Debt [Member] \| April 2016 [Member]
Debt Instrument [Line Items]
Senior Notes		197,377,000	197,377,000
Unsecured Debt [Member] \| July 2016 [Member]
Debt Instrument [Line Items]
Convertible Debt		134,000	45,119,000
Unsecured Debt [Member] \| June 2017 [Member]
Debt Instrument [Line Items]
Senior Notes		295,000,000	295,000,000
Unsecured Debt [Member] \| October 2018 [Member]
Debt Instrument [Line Items]
Senior Notes		250,000,000	250,000,000
Unsecured Debt [Member] \| April 2019 [Member]
Debt Instrument [Line Items]
Senior Notes		0	200,000,000
Unsecured Debt [Member] \| May 2019 [Member]
Debt Instrument [Line Items]
Senior Notes		0	250,000,000
Unsecured Debt [Member] \| November 2020 [Member]
Debt Instrument [Line Items]
Senior Notes		200,000,000	200,000,000	200,000,000
Unsecured Debt [Member] \| November 2021 [Member]
Debt Instrument [Line Items]
Senior Notes		150,000,000	150,000,000
Unsecured Debt [Member] \| January 2022 [Member]
Debt Instrument [Line Items]
Senior Notes		425,000,000	425,000,000
Unsecured Debt [Member] \| April 2027 [Member]
Debt Instrument [Line Items]
Senior Notes		200,000,000	200,000,000
Unsecured Debt [Member] \| May 2024 [Member]
Debt Instrument [Line Items]
Senior Notes		550,000,000	0
Unsecured Debt [Member] \| July 2018 [Member]
Debt Instrument [Line Items]
Bank credit facility due March 2016		235,000,000	30,000,000
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Obligations under capital leases		181,002,000	189,697,000
Mortgages [Member]
Debt Instrument [Line Items]
Mortgage notes and other debt, maturities through 2047		$ 4,117,000	$ 4,752,000