Commitment Fee Under Credit Facility Standard

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- Definition

Current ratio of credit facility.

+ References

No definition available.

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- Definition

Debt Instrument, Issued at Discount, Percent of Par

+ References

No definition available.

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- Definition

Debt Instrument, Variable Interest Rate, Payable Assessment Period

+ References

No definition available.

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- Definition

Equal redemption price percentage of principal amount of debt.

+ References

No definition available.

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- Definition

Estimated annual payments, long term debt and other liabilities, due in the next twelve months.

+ References

No definition available.

+ Details

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- Definition

Estimated annual payments, long term debt and other liabilities, due in year five.

+ References

No definition available.

+ Details

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- Definition

Estimated annual payments, long term debt and other liabilities, due in year four.

+ References

No definition available.

+ Details

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- Definition

Estimated annual payments, long term debt and other liabilities, due in year three.

+ References

No definition available.

+ Details

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- Definition

Estimated annual payments, long term debt and other liabilities, due in year two.

+ References

No definition available.

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- Definition

Interest rate in addition to LIBOR.

+ References

No definition available.

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- Definition

Leverage ratio of long term debt to consolidated EBITDA.

+ References

No definition available.

+ Details

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- Definition

Loan origination fees paid to date. These fees are being amortized over the life of the agreement.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Minimum redemption percentage of debt outstanding.

+ References

No definition available.

+ Details

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- Definition

Credit facility prohibits the payment of dividends over 0.25 of cni for preceding fiscal year.

+ References

No definition available.

+ Details

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- Definition

Percentage of maximum aggregate principal equity amount of the original principal amount that can be redeemed.

+ References

No definition available.

+ Details

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- Definition

Proceed from equity offerings redemption price percentage.

+ References

No definition available.

+ Details

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- Definition

Senior notes repurchase price in percentage for change of control.

+ References

No definition available.

+ Details

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- Definition

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

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- Definition

Interest rate stated in the contractual debt agreement.

+ References

+ Details

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- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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-Publisher FASB

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-Number 129

-Paragraph 2, 4

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- Definition

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

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Article 5

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-Publisher FASB

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-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.22(a)(2))

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-Paragraph 2, 4

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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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.

+ Details

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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

-Publisher FASB

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-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

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-Number 210

-Section 02

-Paragraph 19, 22

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- Definition

Disclosure of timing of required repayments, sinking fund requirements, and other redeemable securities at fixed or determinable prices and dates in the five years immediately following the date of the latest balance sheet presented in the financial statements, and the amount thereafter to fully repay the principal of long-term debt. These disclosures may be made either on an individual debt or security basis, by type of debt or security basis, or on a combined basis.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

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- Definition

The total of the cash outflow during the period which has been paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt and the cost incurred directly for the issuance of equity securities.

+ References

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- Definition

The cash inflow from a borrowing supported by a written promise to pay an obligation.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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-Publisher FASB

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- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

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-Subparagraph (b)

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-Paragraph 20

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Long-Term Debt And Other Long-Term Liabilities (Narrative) (Details) (USD $)	0 Months Ended			6 Months Ended
	Nov. 13, 2012	Jul. 24, 2012	May 18, 2011	Jun. 30, 2013	Dec. 31, 2012	Sep. 05, 2012
Debt Instrument [Line Items]
Credit facility maturity date				9/13/2016
Credit facility maximum credit amount				$ 900,000,000
Commitment fee under credit facility standard				1.00%
Origination, agency and syndication and other related fees						1,500,000
Payable assessment term for LIBOR				90 days
LIBOR interest rate plus one percent				LIBOR plus 1.00%
Line of credit facility, amount outstanding				70,000,000	71,100,000
Current ratio of credit facility				1 to 1
Leverage ratio of long-term debt				4 to 1
Aggregate principal amount	650,000,000
Interest percentage of senior subordinated notes	6.625%	6.625%	6.625%	6.625%
Debt instrument issued at discount, percent of par		98.75%
Debt instrument maturity date	May 15, 2021	May 15, 2021	May 15, 2021	May 15, 2021
Deducting fees for debt issuance		8,700,000
Repayment of outstanding borrowings under unsecured credit facility			220,300,000
Percentage of maximum, aggregate principal equity amount				35.00%
Proceed from equity offerings redemption price percentage				106.625%
Minimum redemption percentage of debt outstanding				65.00%
Equal redemption price percentage of principal amount of debt				100.00%
Senior notes repurchase price in percentage				101.00%
2013				12,100,000
2014				40,600,000
2015				5,600,000
2016				74,000,000
2017				3,700,000
Minimum [Member]
Debt Instrument [Line Items]
Commitment fee percentage under credit facility				0.375%
LIBOR plus interest rate				1.75%
Maximum [Member]
Debt Instrument [Line Items]
Commitment fee percentage under credit facility				0.50%
LIBOR plus interest rate				2.50%
Maximum payment of dividends as a percentage of consolidated net income, prohibited under credit agreement				30.00%
6.625% Senior Subordinated Notes Due 2021 [Member]
Debt Instrument [Line Items]
Aggregate principal amount		400,000,000	250,000,000
Proceeds from sale of notes			244,000,000
Deducting fees for debt issuance			6,000,000
Line Of Credit Facility Lender Determined Amount [Member]
Debt Instrument [Line Items]
Credit facility current credit amount				800,000,000
Line Of Credit Facility Commitment Amount [Member]
Debt Instrument [Line Items]
Credit facility current credit amount				$ 500,000,000