Share based compensation arrangement by share based payment award options expiration period.

No definition available.

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- Definition

Share based compensation arrangement by share based payment award stock award and option vesting rate per year.

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Level of Performance Attained, Percentage

+ References

No definition available.

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

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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.

+ References

No definition available.

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- Definition

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.

+ 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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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).

+ 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)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ 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 (d)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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.

+ Details

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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).

+ 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 (a)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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

As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest.

+ 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)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

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

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- Definition

As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be 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 (e)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Number of share instruments newly issued under a share-based compensation plan.

+ References

+ Details

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- Definition

Weighted average remaining contractual term for fully vested and expected to vest options 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

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

+ References

No definition available.

+ Details

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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

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- Definition

The remaining 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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Stockholders' Equity - Narrative (Detail) - USD ($)	3 Months Ended		12 Months Ended
Stockholders' Equity - Narrative (Detail) - USD ($)	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Feb. 28, 2008	Oct. 25, 2001
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for stock repurchase program (in shares)						1,500,000
Common stock left remaining to repurchase under the plan (in shares)			942,443
Aggregate stock repurchase amount			$ 2,500,000.0
Pretax total unrecognized compensation cost related to share options- period			5 months 2 days
Share options outstanding at end of year (in shares)			188,213	395,625
Shares options outstanding vested or expected to vest (in shares)			173,457
Shares options outstanding vested or expected to vest -weighted average exercise price (usd per share)			$ 5.76
Shares options outstanding vested or expected to vest ,intrinsic value			$ 1,700,000
Shares options outstanding vested or expected to vest -weighted average contractual life			2 years 6 months 20 days
Pretax total unrecognized compensation cost related to share options, less than			$ 100,000
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			246,020
Pretax of total unrecognized compensation cost related to non-vested restricted stock awards			$ 3,000,000
Pretax total unrecognized compensation cost related to share options- period			1 year 9 months 26 days
Fair value of shares vested			$ 4,300,000	$ 3,900,000	$ 2,300,000
Performance Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			202,442
Pretax of total unrecognized compensation cost related to non-vested restricted stock awards			$ 1,000,000
Pretax total unrecognized compensation cost related to share options- period			1 year 6 months 15 days
Fair value of shares vested			$ 1,200,000
2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of common stock shares authorized for issuance (in shares)			4,100,000
2014 Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price percentage of the fair market value of common stock			100.00%
2014 Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock expiration period			10 years
2014 Plan \| Ten Percent Or More Stockholders \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price percentage of the fair market value of common stock			110.00%
2014 Plan \| Ten Percent Or More Stockholders \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock expiration period			5 years
2014 Plan \| Restricted Stock Awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting period			3 years
2014 Plan \| Restricted Stock Awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting period			4 years
Omnibus Plan \| Performance Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of performance attained		100.00%
Shares issued (in shares)	148,178
2007 Stock Incentive Plan \| Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock expiration period			7 years
Stock vesting period			4 years
Stock vesting percentage per year			25.00%
The 1999 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of common stock shares authorized for issuance (in shares)							4,398,001