Options vest description.

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- Definition

Restricted share award employee benefit expiry of option.

+ 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 options awarded to employees as compensation.

+ References

No definition available.

+ Details

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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

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 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.

+ 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

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to 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)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

+ References

No definition available.

+ Details

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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.

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

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.28,29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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Stock-Based Compensation - Equity-Classified Stock Compensation (Non-Qualified Stock Option Awards) - Additional Information (Detail) - USD ($)						3 Months Ended	12 Months Ended
	Feb. 26, 2016	Jun. 29, 2015	May. 20, 2015	Feb. 09, 2015	Jan. 23, 2013	Mar. 31, 2016	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2011
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted exercise price	$ 55.62
Non-Qualified Stock Option Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiry of option						(a) the tenth anniversary of the grant date; (b) twelve months after the employee’s death or termination for disability; or (c) thirty days after the termination of employment for any reason other than death or disability.
Stock based compensation, Shares, Granted						40,000
Options granted exercise price						$ 55.62
Stock based compensation, Shares, surrendered						40,000
Weighted-average grant-date fair value of options granted						$ 13.97
Stock based compensation, Shares, Exercised						0
Unrecognized compensation cost						$ 564,000
Weighted average period of compensation cost to be recognized						2 years 1 month 6 days
Non-Qualified Stock Option Award [Member] \| Mr Albright [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiry of option						(a) January 28, 2025; (b) twelve months after the employee’s death or termination for disability; or (c) thirty days after the termination of employment for any reason other than death or disability.
Percent of options vested in each anniversaries, description						The option vested on January 28, 2016.
Non-Qualified Stock Option Award [Member] \| Mr Patten [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiry of option						(a) the fifth anniversary of the grant date; (b) twelve months after the employee’s death or termination for disability; or (c) thirty days after the termination of employment for any reason other than death or disability.
Percent of options vested in each anniversaries, description						One-third of these options vested on each of the first, second, and third anniversaries of the grant date, provided the recipient was an employee of the Company on those dates.
Non-Qualified Stock Option Award [Member] \| Certain Employee [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiry of option						(a) June 29, 2025; (b) twelve months after the employee’s death or termination for disability; or (c) thirty days after the termination of employment for any reason other than death or disability.
Percent of options vested in each anniversaries, description						One-third of the option will vest on each of the first, second, and third anniversaries of the grant date, provided the recipient is an employee of the Company on such dates.
Non-Qualified Stock Option Award [Member] \| 2010 Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation, Shares, Granted					51,000
Stock based compensation, Shares, Granted		10,000
Options granted exercise price		$ 57.54
Non-Qualified Stock Option Award [Member] \| 2010 Plan [Member] \| Mr Albright [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation, Shares, Granted									50,000
Stock based compensation, Shares, Granted	40,000		40,000	20,000
Options granted exercise price			$ 55.62	$ 57.50
Stock based compensation, Shares, surrendered	40,000
Non-Qualified Stock Option Award [Member] \| 2010 Plan [Member] \| Mr Patten [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation, Shares, Granted								10,000
Stock based compensation, Shares, Granted					10,000
Non-Qualified Stock Option Award [Member] \| 2010 Plan [Member] \| Mr Smith [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation, Shares, Granted							10,000