Represents the number of shares counted by each award against the aggregate share limit.

No definition available.

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- Definition

The amount of adjustment to stockholders' equity associated with an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

+ References

No definition available.

+ Details

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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

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

+ Details

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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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Stock-Based Compensation - Stock Incentive Plan - Narratives (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 21, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Apr. 30, 2013
Stock-Based Compensation
Treasury stock purchased		$ 1,759	$ 2,788	$ 1,515
Treasury Stock
Stock-Based Compensation
Treasury stock purchased, shares		167,382	225,237	184,368
Treasury stock purchased		$ 1,759	$ 2,788	$ 1,515
2013 Plan
Stock-Based Compensation
Maximum number of shares available under the Plan					10,100,000
Additional shares authorized (shares)	2,832,994
2013 Plan \| On the settlement of employee stock purchase plan shares
Stock-Based Compensation
Number of shares counted by each award					1
2013 Plan \| Stock-settled award other than an option, stock appreciation right or award for which the recipient pays intrinsic value
Stock-Based Compensation
Number of shares counted by each award					1.75