In the money value of stock options.

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- Definition

Share based compensation arrangement by share based payment award compensation cost before tax

+ References

No definition available.

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- Definition

Share-based compensation arrangement by share-based payment award compensation cost net of tax.

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No definition available.

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- Definition

Share based compensation reserved for issuance upon conversion of shares.

+ References

No definition available.

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

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- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 (i)
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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

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No definition available.

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- Definition

Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 55
-Paragraph 24
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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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-Paragraph 2
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- Definition

Net number of share options (or share units) granted during the period.

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-Publisher FASB
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-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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-SubTopic 10
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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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Common Stock - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Feb. 29, 2016	Jul. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase programs authorized to purchase, value	$ 800,000,000			$ 400,000,000	$ 400,000,000
Stock repurchased, value	346,890,000	$ 224,260,000	$ 100,749,000
Compensation cost recognized	48,109,000	39,971,000	31,092,000
Excess tax benefit from share based compensation	45,219,000	47,364,000	33,912,000
Total in-the-money value of all stock options exercised during the year	$ 149,400,000	154,100,000	112,500,000
Number of shares granted	2,945,550
Stock issued during period, net of cancellations	1,400,000
Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased, value	$ 30,000	18,000	10,000
Shares reserved	2,800,000
Issuance upon conversion of shares	21,805,773
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost recognized, pre-tax charge	$ 45,800,000	38,000,000	29,200,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost recognized, after-tax	2,300,000	$ 2,000,000	$ 1,900,000
Unrecognized compensation cost	$ 82,100,000
Unrecognized compensation cost vesting period	2 years 8 months 12 days
Unvested Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 82,100,000
Unrecognized compensation cost vesting period	2 years 8 months 12 days
Stock Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased, shares	4,386,991
Stock repurchased, value	$ 514,109,000
Income Tax Withholding Obligations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased, shares	468,228	493,296	480,972
Stock repurchased, value	$ 57,000,000	$ 58,000,000	$ 42,700,000
Forfeited Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased, shares	2,500
Stock Repurchase Programs Twenty Sixteen
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase programs authorized to purchase, value	$ 400,000,000
Stock Repurchase Programs Twenty Sixteen \| Stock Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased, shares	2,512,592
Stock repurchased, value	$ 289,937,000
Stock Repurchase Programs Twenty Fifteen
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased, shares		1,326,207
Stock repurchased, value		$ 166,222,000
Stock Repurchase Programs Twenty Fourteen
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase programs authorized to purchase, value			$ 400,000,000
Stock repurchased, shares			548,192
Stock repurchased, value			$ 57,950,000
Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value of option granted, per share	2,800,000	2,900,000	2,800,000
Weighted-average grant date fair value of option granted	$ 23.80	$ 21.37	$ 17.23
Common Stock remain available for issuance	4,400,000
Stock Incentive Plan \| Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved	29,500,000
2005 Employees' Restricted Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock remain available for issuance	1,400,000
Number of shares granted	75,792	68,213	75,303
2005 Employees' Restricted Stock Purchase Plan \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued under employee stock purchase plan	14,146	17,789	26,189
Special Dividend
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends declared and paid, per share	$ 0.40	$ 0.40	$ 0.30
Dividends declared and paid	$ 38,900,000	$ 39,500,000	$ 29,700,000