Number of shares of common stock issued and outstanding over which shares can be repurchased under a repurchase plan.

No definition available.

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Total fair market value of annual grant of restricted stock awards per participant, under a restricted stock plan.

+ References

No definition available.

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- Definition

The maximum number of options that can be granted per participant under an employee share-based plan.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ 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

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

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- Definition

Amount of obligations incurred for employer-related costs classified as other, payable within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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

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No definition available.

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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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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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

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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
-Topic 505
-SubTopic 10
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-Paragraph 2
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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended			48 Months Ended	175 Months Ended
	May 07, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Apr. 30, 2016	Dec. 31, 2016	May 03, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of shares under stock purchase plan						10,214
Total intrinsic value of options exercised		$ 29,000	$ 31,000	$ 18,000
Total unrecognized share-based compensation cost		$ 81,000				$ 81,000
Unrecognized share-based compensation cost, weighted average period		2 years 6 months
Stock Option Plan 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for grant							3,000
Grants, maximum number of shares per person		100
Shares available for granting of awards		76				76
Stock Option Plan 2016 \| Upper end
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Employee Stock Option Plan \| Upper end
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					5 years
Maximum contractual term		10 years
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for grant		12,305				12,305
Number of additional shares authorized	3,000
Purchase price percentage of fair market value		85.00%
Amount withheld employee stock purchase plan		$ 14,000				$ 14,000
Weighted average fair value of award granted during the period		$ 10.99	$ 10.45	$ 9.60
Directors' Restricted Stock Plan 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for grant		250				250
Shares available for granting of awards		144				144
Fair value of annual grant per participant of restricted stock awards		$ 200
Unvested restricted shares		0				0
Restricted shares granted		41
Weighted average fair value of award granted during the period		$ 48.43
Non-Discretionary Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for repurchase		40,000				40,000
Discretionary Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected common stock shares issued and outstanding		170,000				170,000