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

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

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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

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.

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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

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.

+ 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

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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Stock-Based Compensation - Equity-Classified Stock Compensation (Non-Qualified Stock Option Awards) - Additional Information (Detail) - Non-Qualified Stock Option Award [Member] - USD ($)					12 Months Ended
	Jun. 29, 2015	May. 20, 2015	Feb. 09, 2015	Jan. 23, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
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					70,000	10,000	51,000
Weighted-average grant-date fair value of options granted					$ 14.12
Total intrinsic value of options exercised					$ 823,000
Unrecognized compensation cost related to market condition non-vested restricted shares					$ 659,000
Weighted average period of compensation cost to be recognized					1 year 6 months
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 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 those dates.
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
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	20,000
Options granted exercise price		$ 55.62	$ 57.50
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
Options granted exercise price				$ 34.95
2010 Plan [Member] \| Mr Smith [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation, Shares, Granted						10,000