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Employee Benefit Plans (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Number
Shares, Capstone options assumed in business combination	130,469
Weighted Average Exercisable Price
Weighted Average Exercisable Price, Capstone options assumed in business combination (in dollars per share)	$ 11.76
Officer and Employee Plans [Member]
Number
Shares, Outstanding	717,524	817,414
Shares, Granted	0	0
Shares, Exercised	(506,923)	(89,556)
Shares, Forfeited	(24,496)	(10,334)
Shares, Outstanding	316,574	717,524
Weighted Average Exercisable Price
Weighted Average Exercisable Price, Outstanding (in dollars per share)	$ 10.57	$ 10.62
Weighted Average Exercisable Price Granted (in dollars per share)	0.00	0.00
Weighted Average Exercisable Price Exercised (in dollars per share)	9.64	8.98
Weighted Average Exercisable Price Forfeited (in dollars per share)	19.90	28.49
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 11.82	$ 10.57

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- Definition

It represents the share based compensation arrangement by share based payment award options retained by In merger.

+ References

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- Definition

It represents the share based compensation arrangements by share based payment award options retained by in merger weighted average exercise price.

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- Definition

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

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- Definition

Number of options outstanding, including both vested and non-vested options.

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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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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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