Information About Non-Qualified Stock Options Outstanding (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding Weighted Average Remaining Contractual Life (in years)	5 years 7 months
Nonqualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding at Year-End	8,295	9,906
Outstanding Weighted Average Remaining Contractual Life (in years)	5 years 7 months
Outstanding Weighted Price Average Exercise at Year-End	$ 35.04	$ 33.18
Number Exercisable at Year-End	6,225	7,599
Exercisable Weighted Average Exercise Price at Year-End	$ 33.67	$ 31.79
Nonqualified Stock Options \| Range 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental Changes in Stock Price Lower Range Limit	$ 20.01
Incremental Changes in Stock Price Upper Range Limit	$ 30.00
Number Outstanding at Year-End	1,938
Outstanding Weighted Average Remaining Contractual Life (in years)	3 years 7 months
Outstanding Weighted Price Average Exercise at Year-End	$ 26.83
Number Exercisable at Year-End	1,938
Exercisable Weighted Average Exercise Price at Year-End	$ 26.83
Nonqualified Stock Options \| Range 3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental Changes in Stock Price Lower Range Limit	$ 30.01
Incremental Changes in Stock Price Upper Range Limit	$ 40.00
Number Outstanding at Year-End	4,622
Outstanding Weighted Average Remaining Contractual Life (in years)	6 years 2 months
Outstanding Weighted Price Average Exercise at Year-End	$ 35.51
Number Exercisable at Year-End	3,408
Exercisable Weighted Average Exercise Price at Year-End	$ 34.64
Nonqualified Stock Options \| Range 4
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental Changes in Stock Price Lower Range Limit	$ 40.01
Incremental Changes in Stock Price Upper Range Limit	$ 50.00
Number Outstanding at Year-End	1,735
Outstanding Weighted Average Remaining Contractual Life (in years)	6 years 6 months
Outstanding Weighted Price Average Exercise at Year-End	$ 42.98
Number Exercisable at Year-End	879
Exercisable Weighted Average Exercise Price at Year-End	$ 44.97

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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