Equity Plan (Details Textual 2)	6 Months Ended
Jun. 30, 2019 $ / shares
Share-based compensation arrangement by share-based payment award [Line Items]
Grant date fair value per share	$ 13.12
2019 Performance-based Awards [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Grant date fair value per share	$ 9.49
Expected volatility rate	23.52%
Risk free interest rate	2.57%
Performance period	3 years
No payout as a percentage maximum	0.00%
Threshold payout as a percentage of maximum	25.00%
Target payout as a percentage of maximum	50.00%
Maximum payout	100.00%
No payout if relative TSR less than	67.00%
Threshold payout if relative TSR equal to	67.00%
Target payout if relative TSR equal to	100.00%
Maximum payout if relative TRS greater than or equal to	133.00%

The period used to measure performance for share-based payment awards.

No definition available.

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- Definition

The maximum payout of the performance-based awards as a percentage of the shares awarded.

+ References

No definition available.

+ Details

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- Definition

The specified percentage that the relative TSR is equal to or greater than for maximum payout of the performance-based award.

+ References

No definition available.

+ Details

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- Definition

The payout of performance-based awards as a percentage of the maximum payout if no payout.

+ References

No definition available.

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- Definition

The specified percentage that the relative TSR is less than for no payout of the performance-based award.

+ References

No definition available.

+ Details

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- Definition

The target payout of performance-based awards as a percentage of the maximum payout.

+ References

No definition available.

+ Details

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- Definition

The specified percentage that the relative TSR is equal to for target payout of the performance-base award.

+ References

No definition available.

+ Details

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- Definition

The threshold payout of performance-based awards as a percentage of the maximum payout.

+ References

No definition available.

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- Definition

The specified percentage that the relative TSR is equal to for threshold payout of the performance-based award.

+ References

No definition available.

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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).

+ 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 (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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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.

+ 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 (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

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

+ 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 (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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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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