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Senior Debt (Details) (USD $) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2014 | Mar. 31, 2014 | Dec. 31, 2013
Covenants [Abstract] |  |  |
Outstanding indebtedness less cash in excess of | $ 25,000,000 | $ 25,000,000 |
Consolidated funded debt outstanding | 819,000,000 | 819,000,000 |
Consolidated EBITDA |  | 315,700,000 |
Consolidated senior secured debt outstanding | 269,000,000 | 269,000,000 |
Adjusted consolidated EBITDA |  | 558,800,000 |
Consolidated fixed charges |  | 285,400,000 |
Financial Covenants Ratios (Table Details) [Abstract] |  |  |
Required consolidated total leverage ratio, maximum | 4.50 | 4.50 |
Actual consolidated total leverage ratio | 2.59 | 2.59 |
Required consolidated senior secured leverage ratio, maximum | 2.75 | 2.75 |
Actual consolidated senior secured leverage ratio | 0.85 | 0.85 |
Required consolidated fixed charge coverage ratio, minimum | 1.5 | 1.5 |
Actual consolidated fixed charge coverage ratio | 1.96 | 1.96 |
Interest Rate [Abstract] |  |  |
Interest rate terms | Borrowings under the Revolving Facility bear interest at varying rates equal to either the Eurodollar rate plus 1.50% to 2.75%, or the ABR rate plus 0.50% to 1.75%, at our election. |  |
Commitment fee percentage, minimum | 0.30% |  |
Commitment fee percentage, maximum | 0.50% |  |
Commitment fee percentage, actual | 0.45% |  |
Senior Debt (Details) [Abstract] |  |  |
Event of default-3rd party ownership % of our voting stock | 35.00% | 35.00% |
Event of default-not satisfied or bonded judgment in excess of | 50,000,000 | 50,000,000 |
Maximum period allowed for pending judgment to satisfy or bond (in days) | 30 | 30 |
Debt Instrument [Line Items] |  |  |
Senior credit facilities, maximum amount | 900,000,000 | 900,000,000 |
Senior credit facilities, additional amount allowed | 250,000,000 | 250,000,000 |
Term loan, maximum facility | 225,000,000 | 225,000,000 |
Term loan, amount outstanding | 225,000,000 | 225,000,000 | 187,500,000
Term loans, periodic payment, principal | 562,500 |  |
Line of credit, maximum facility | 675,000,000 | 675,000,000 |
Line of credit, amount outstanding | 100,000,000 | 100,000,000 | 160,500,000
Letters of credit outstanding, amount | 104,700,000 | 104,700,000 |
Letters of credit, amount available | 470,300,000 | 470,300,000 |
Unsecured line of credit, maximum facility | 20,000,000 | 20,000,000 |
Unsecured line of credit, amount outstanding | $ 0 | $ 0 | $ 18,300,000
Eurodollar [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Description of variable rate basis | Eurodollar rate |  |
Alternate Base Rate [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Description of variable rate basis | ABR rate |  |
Revolving Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Maturity date | Mar. 19, 2019 |  |
Margin on Eurodollar rate, actual | 2.25% | 2.25% |
Margin on ABR rate, actual | 1.25% | 1.25% |
Revolving Facility [Member] | Eurodollar [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Basis margin on variable rate | 2.75% |  |
Revolving Facility [Member] | Eurodollar [Member] | Minimum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Basis margin on variable rate | 1.50% |  |
Revolving Facility [Member] | Alternate Base Rate [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Basis margin on variable rate | 1.75% |  |
Revolving Facility [Member] | Alternate Base Rate [Member] | Minimum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Basis margin on variable rate | 0.50% |  |
Term Loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Maturity date | Mar. 19, 2021 |  |
Margin on Eurodollar rate, actual | 3.00% | 3.00% |
Margin on ABR rate, actual | 2.00% | 2.00% |

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