Represents the term used for risk-free rate and historical volatility.

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- Definition

Represents the number of shares vesting during the period as a percentage of target.

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No definition available.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

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

+ References

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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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

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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

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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- Definition

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

+ References

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- References

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ 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
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-Name Accounting Standards Codification
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-Section S99
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-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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Share-Based Compensation - Restricted Stock Awards (Details) - USD ($)		6 Months Ended
	Mar. 12, 2020	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Restricted Stock
Restricted Stock Awards
Unvested at beginning of period (in shares)		20,249	16,424
Granted (in shares)		13,444	10,366
Vested (in shares)		9,998	6,541
Unvested at end of period (in shares)		23,695	20,249
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)		$ 28.78	$ 30.26
Granted (in dollars per share)		21.05	27.30
Vested (in dollars per share)		29.16	30.14
Unvested at end of period (in dollars per share)		$ 24.24	$ 28.78
Unrecognized compensation
Vesting period		3 years
Unrecognized compensation costs		$ 483,000
Restricted Stock Units Based on a Performance Condition
Restricted Stock Awards
Unvested at beginning of period (in shares)		35,976	23,538
Granted (in shares)		16,129	12,438
Vested (in shares)		7,680
Forfeited (in shares)		3,840
Unvested at end of period (in shares)		40,585	35,976
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)		$ 29.16	$ 30.14
Granted (in dollars per share)		21.05	27.30
Vested (in dollars per share)		29.53
Forfeited (in dollars per share)		29.53
Unvested at end of period (in dollars per share)		$ 25.83	$ 29.16
Unrecognized compensation
Unrecognized compensation costs		$ 531,000
Unrecognized compensation costs, period of recognition		3 years
Restricted Stock Units Based on a Performance Condition \| Minimum
Unrecognized compensation
Shares vesting as a percentage of target		0.00%
Restricted Stock Units Based on a Performance Condition \| Maximum
Unrecognized compensation
Shares vesting as a percentage of target		150.00%
Restricted Stock Units Based on a Market Condition
Restricted Stock Awards
Unvested at beginning of period (in shares)		8,994	5,884
Granted (in shares)		4,032	3,110
Vested (in shares)		1,197
Forfeited (in shares)		1,682
Unvested at end of period (in shares)		10,147	8,994
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)		$ 25.74	$ 26.42
Granted (in dollars per share)		22.16	24.45
Vested (in dollars per share)		24.44
Forfeited (in dollars per share)		24.44
Unvested at end of period (in dollars per share)		$ 24.69	$ 25.74
Unrecognized compensation
Unrecognized compensation costs		$ 104,000
Unrecognized compensation costs, period of recognition		3 years
Assumptions used in the Monte Carlo valuation of PRSUs
Term used for risk-free rate	2 years 9 months 18 days
Term used for risk-free rate and historical volatility	2 years 9 months 25 days
Risk-free interest rate (as a percent)	0.56%
Closing stock price (in dollars per share)	$ 21.05			$ 30.94
Annualized volatility (as a percent)	18.02%