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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Unearned Performance-based Awards in Period

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Unearned Performance Based Options in Period

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

Unrecognized cost of unvested share-based compensation awards.

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-Publisher FASB
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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.

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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.

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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
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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Name Accounting Standards Codification
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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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- 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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-Publisher FASB
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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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-Name Accounting Standards Codification
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- Definition

Percentage of vesting of share-based compensation awards.

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-Publisher FASB
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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

Number of options vested.

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No definition available.

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Stock-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2016 shares	Sep. 30, 2016 USD ($) plan	Sep. 26, 2015 USD ($)	Sep. 30, 2016 USD ($) plan $ / shares shares	Sep. 26, 2015 USD ($) $ / shares	Dec. 31, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of compensation plans \| plan		3		3
Allocated Share-based compensation expense \| $		$ 1.4	$ 1.3	$ 4.1	$ 3.8
Unrecognized stock-based compensation expense \| $		8.9		$ 8.9
Weighted average, expected recognition period				2 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, years				3 years
Number of performance based shares granted (in shares)				0
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options unvested (in shares)				23,328
Total intrinsic value of stock options exercised \| $		0.0	0.1	$ 1.7	1.7
Fair value of stock options vested \| $		$ 0.1	$ 0.1	$ 3.5	$ 3.9
Employee Stock Option \| Black-Scholes Option Valuation Model
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option weighted average grant date fair value (in dollars per share) \| $ / shares				$ 12.42	$ 16.33
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, years				3 years
Number of restricted stock units vested (in shares)				13,247
Number of restricted stock units unvested (in shares)				677
Number of performance based shares granted (in shares)				160,228
Restricted Stock Units \| Non-Executive Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, years				3 years
Number of performance based shares granted (in shares)	18,615
Performance Based Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options vested (in shares)						7,225
Number of stock options unvested (in shares)				23,328
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units vested (in shares)						226
Number of restricted stock units unvested (in shares)				677
Year one \| Performance Based Employee Stock Options \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Year one \| Performance Based Restricted Stock Units \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Year two \| Performance Based Employee Stock Options \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Year two \| Performance Based Restricted Stock Units \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Year three \| Performance Based Employee Stock Options \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Year three \| Performance Based Restricted Stock Units \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Prior to fiscal year 2016 \| Year one \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Prior to fiscal year 2016 \| Year one \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Prior to fiscal year 2016 \| Year two \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Prior to fiscal year 2016 \| Year two \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Prior to fiscal year 2016 \| Year three \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Prior to fiscal year 2016 \| Year three \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Fiscal year 2016 \| Year one \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Fiscal year 2016 \| Year two \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%
Fiscal year 2016 \| Year three \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installment percentage				33.33%