Share Based Compensation Arrangement by Share Based Payment Award, Employee Stock Purchase Plan, Number of Offerings

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award, Employee Stock Purchase Plan, Offering Period

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options, Target Award, Percentage

+ References

No definition available.

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Expiry Period From Date Of Grant

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Performance 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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- Definition

The cash inflow from the additional capital contribution to the entity.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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- Definition

Discount rate from fair value on purchase date that participants pay for shares.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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-Publisher FASB
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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

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

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

+ References

No definition available.

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Equity Compensation (Additional Information) (Details)	3 Months Ended		6 Months Ended		12 Months Ended	63 Months Ended
Equity Compensation (Additional Information) (Details)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) offering_periods shares	Jun. 30, 2017 USD ($)	Dec. 31, 2017	Jun. 30, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from the exercise of stock options, net			$ 698,000	$ 1,905,000
Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense (income)	$ 900,000.0	$ 900,000.0	$ 900,000	900,000.0
Stock vested (shares) \| shares			8,400
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, contractual term (years)			10 years
Stock options, grants in period, gross \| shares						0
Options exercised, total intrinsic value			$ 700,000
Proceeds from the exercise of stock options, net			$ 2,000,000
Performance-Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock award program, measurement period (years)			3 years
Expected dividend yield (percent)			0.00%
Compensation expense (income)	800,000	1,600,000	$ 1,800,000	1,500,000
Stock vested (shares) \| shares			81,230
Performance-Based Restricted Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock award program, awarded shares as a percentage of the original award amount (percent)			0.00%
Performance-Based Restricted Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock award program, awarded shares as a percentage of the original award amount (percent)			200.00%
Time Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense (income)	1,300,000	1,700,000	$ 2,900,000	2,700,000
Stock vested (shares) \| shares			77,513
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense (income)	$ 200,000	$ 100,000	$ 100,000	$ 0
Employee stock purchase plan, number of offering (offering period) \| offering_periods			2
Employee stock purchase plan, offering period (months)			6 months
Employee stock purchase plan, purchase price discount (percent)					15.00%