Annual Awards of Deferred Stock Units to be Issued to each Non-Employee Director

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- Definition

Annual Awards of Deferred Stock Units to be Issued to each Non-Employee Director, Aggregate Fair Value

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- Definition

Number of Additional Shares To Be Granted If Maximum Perfornance Level Is Met or Exceeded

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- Definition

Reduction in Share Authorization if Maximum Performance Level is Met or Exceeded

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award, Automatic Annual Grant, Non-Employee Directors, Options

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award, Automatic Annual Grant, Non-Employee Directors, Options, Expiration Date

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- Definition

Share-based Compensation,Initial Grant For Non-Employee Director, Options

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
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- Definition

Unrecognized cost of unvested share-based compensation awards.

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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

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

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-Publisher FASB
-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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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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-Publisher FASB
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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.

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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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Long-term Equity-based Compensation (Details) - USD ($)		12 Months Ended
Long-term Equity-based Compensation (Details) - USD ($)	Feb. 04, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 2,000,000	$ 4,600,000	$ 400,000
Shares authorized		10,000,000
Shares available for grant		6,762,714
Share-based compensation expense		$ 4,700,000	$ 6,500,000	$ 6,400,000
Total compensation cost not yet recognized		$ 8,100,000
Total compensation cost not yet recognized, period for recognition		1 year 9 months
Annual Awards of Deferred Stock Units to be Issued to each Non-Employee Director, Aggregate Fair Value		$ 75,000
Initial grant for non-employee director, shares			4,000	4,000
Automatic annual grant, non-employee directors, options			4,000	4,000
Automatic annual grant, non-employee directors, options, expiration date			10 years	10 years
Annual Awards of Deferred Stock Units to be Issued to each Non-Employee Director			500	500
Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction in share authorization if maximum performance level is met or exceeded (shares)		682,752
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period		51,400
Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period		47,304
Performance Period, 2016 to 2018 [Member] \| Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Additional Shares To Be Granted If Maximum Perfornance Level Is Met or Exceeded		137,615
Performance Period, 2014 to 2016 [Member] \| Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction in share authorization if maximum performance level is met or exceeded (shares)		140,286
Subsequent Event [Member] \| Performance Period, 2014 to 2016 [Member] \| Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	43,207