Debt Covenant, Amount of Borrowing Available

No definition available.

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- Definition

Debt Instrument, Covenant Ratio, Debt To Capitalization Limit

+ References

No definition available.

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- Definition

Letters of Credit Supported by Credit Facility

+ References

No definition available.

+ Details

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- Definition

Additional borrowing capacity under the credit facility based on an accordion feature.

+ References

No definition available.

+ Details

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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.

+ 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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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

+ 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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Date the debt instrument was issued, 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

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Definition

The amount of cash paid for interest during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586

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

-Publisher FASB

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-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

+ Details

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Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Balance Type:	na
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- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

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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

+ Details

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Period Type:	instant

- Definition

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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

+ Details

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DEBT (Narrative) (Detail) (USD $)	12 Months Ended
DEBT (Narrative) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 08, 2011	Feb. 26, 2013	Sep. 26, 2013	Dec. 01, 2005
DebtInstrumentLineItems
Repayments of Long-term Debt	$ 80,000us-gaap_RepaymentsOfLongTermDebt	$ 125,033,000us-gaap_RepaymentsOfLongTermDebt	$ 0us-gaap_RepaymentsOfLongTermDebt
DebtInstrumentCovenantDescription	0.6
LineOfCreditFacilityInterestRateDescription	Borrowings under the credit agreement will accrue interest based on (i) Libor or (ii) a base rate of the highest of (a) the federal funds rate plus 0.5%, (b) BofA’s announced prime rate, or (c) the Eurocurrency rate plus 1%, plus a margin. The interest rate and level of facility fees are dependent on certain financial ratios, as defined in the Credit Agreement. The Credit Agreement also provides customary fees, including administrative agent and commitment fees. In connection with the Credit Agreement, we paid customary transaction fees that have been deferred and are being amortized over the term of the Credit Agreement.
Debt Instrument, Covenant Ratio, Debt To Capitalization Limit	60.00%
InterestPaid	33,000,000us-gaap_InterestPaid	31,000,000us-gaap_InterestPaid	24,000,000us-gaap_InterestPaid
Revolving Credit Facility [Member]
DebtInstrumentLineItems
DebtWeightedAverageInterestRate	1.70%	1.69%
LineOfCreditFacilityMaximumBorrowingCapacity	500,000,000
Line Of Credit Facility Additional Borrowing Capacity	100,000,000
Letters of Credit Supported by Credit Facility	54,000,000
Debt Covenant, Amount of Borrowing Available	446,000,000
Long-term Debt [Member]
DebtInstrumentLineItems
DebtWeightedAverageInterestRate	3.00%
Debt Covenant, Amount of Borrowing Available	1,200,000,000
Senior Notes Four Twenty Four [Member]
DebtInstrumentLineItems
Debt Instrument, Maturity Date	Dec. 01, 2026
Debt Instrument, Face Amount				200,000,000
Debt Instrument, Interest Rate, Stated Percentage				4.24%
Senior Notes Four Zero Five [Member]
DebtInstrumentLineItems
Debt Instrument, Maturity Date	Feb. 26, 2028
Debt Instrument, Face Amount					75,000,000
Debt Instrument, Interest Rate, Stated Percentage					4.05%
Senior Notes Four Eleven [Member]
DebtInstrumentLineItems
DebtInstrumentIssuanceDate	Sep. 26, 2013
Debt Instrument, Maturity Date	Sep. 26, 2028
Debt Instrument, Face Amount						100,000,000
Debt Instrument, Interest Rate, Stated Percentage						4.11%
Senior Notes Three Eighty Four [Member]
DebtInstrumentLineItems
Debt Instrument, Maturity Date	Dec. 01, 2021
Debt Instrument, Face Amount				100,000,000
Debt Instrument, Interest Rate, Stated Percentage				3.84%
Senior Notes Three Seventy [Member]
DebtInstrumentLineItems
Debt Instrument, Maturity Date	Feb. 26, 2023
Debt Instrument, Face Amount					225,000,000
Debt Instrument, Interest Rate, Stated Percentage					3.70%
Senior Notes Three Eighty Five [Member]
DebtInstrumentLineItems
Debt Instrument, Maturity Date	Feb. 26, 2025
Debt Instrument, Face Amount					100,000,000
Debt Instrument, Interest Rate, Stated Percentage					3.85%
Two Thousand Thirteen Senior Notes [Member]
DebtInstrumentLineItems
DebtInstrumentIssuanceDate	Feb. 26, 2013
Debt Instrument, Face Amount					500,000,000
Two Thousand Eleven Notes [Member]
DebtInstrumentLineItems
DebtInstrumentIssuanceDate	Dec. 08, 2011
Debt Instrument, Face Amount				300,000,000
Two Thousand Five [Member]
DebtInstrumentLineItems
DebtInstrumentIssuanceDate	Dec. 01, 2005
Debt Instrument, Maturity Date	Dec. 01, 2017
Debt Instrument, Face Amount							150,000,000
Debt Instrument, Interest Rate, Stated Percentage							5.51%
Revolving Credit Facility [Member]
DebtInstrumentLineItems
Line of Credit Facility, Initiation Date	Aug. 31, 2012
Discontinued Operations [Member] \| Revolving Credit Facility [Member]
DebtInstrumentLineItems
Letters of Credit Outstanding, Amount	$ 9,000,000