Employee Stock Purchase Plan (ESPP), Payroll Deductions

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Other than Options, Nonvested and Expected to Vest, Exercisable, Number

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans

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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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- Definition

Aggregate number of common shares reserved for future issuance.

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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- Definition

Amount of tax benefit from exercise of stock options granted under share-based compensation arrangement.

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- Definition

Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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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

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

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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).

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- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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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No definition available.

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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).

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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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- Definition

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

+ References

No definition available.

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- Definition

Intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options.

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No definition available.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-Based Compensation - Textual (Details)		12 Months Ended
Share-Based Compensation - Textual (Details)	Jun. 02, 2017 shares	Dec. 31, 2018 USD ($) plan $ / shares shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of plans \| plan		5
Share-based compensation expense \| $		$ 482,000	$ 384,000	$ 284,000
Intrinsic value of options exercised \| $		767,000	2,807,000	235,000
Proceeds from exercise of stock options \| $		738,000	2,835,000	231,000
Excess tax benefit realized for option exercises \| $		142,000	805,000	30,000
Unrecognized compensation cost related to non-vested share-based compensation arrangements \| $		$ 0
Total fair value of options vested in period \| $			170,000
Number of options nonvested and expected to vest (shares) \| shares		63,529
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payroll deductions	1.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payroll deductions	15.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit of stock option compensation expense \| $		$ 142,000	805,000	44,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense \| $		459,000	$ 349,000	$ 235,000
Options granted (in shares) \| shares			0	54,650
Unrecognized compensation cost related to non-vested share-based compensation arrangements \| $		$ 677,000
Granted (in dollars per share) \| $ / shares		$ 20.76		$ 14.10
Equity instruments other than options weighted average remaining period		2 years 15 days
Aggregate intrinsic value \| $		$ 1,308,000
Restricted Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		1 year
Restricted Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		5 years
2005 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares) \| shares		0	0	0
2005 Plan \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under plan \| shares		0
Award expiration period		10 years
Award vesting period		5 years
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under plan \| shares		875,000
Number of shares reserved for issuance \| shares		809,996
2015 Plan \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period		10 years
Award vesting period		5 years
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance \| shares		485,978
Discount from market price	10.00%
Reserved for future issuance (in shares) \| shares	500,000
2007 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under plan \| shares		313,360
Award expiration period		10 years
Award vesting period		5 years
2007 Plan \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under plan \| shares		0