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Stock-Based Compensation Stock-Based Compensation Details (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Stock-Based Compensation Details
Employee Benefits and Share-based Compensation	$ 408	$ 970
Minimum [Member]
Stock-Based Compensation Details
Equity Share Payout Range	0
Maximum [Member]
Stock-Based Compensation Details
Equity Share Payout Range	59,922
Share-based Compensation Award, Tranche Two [Member]
Stock-Based Compensation Details
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	25,793
Share Based Compensation Non Option Equity Instruments Granted Weighted Average Exercise Price	$ 30.54

X

- Definition

Equity Share Payout Range

+ References

No definition available.

+ Details

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X

- Definition

Share Based Compensation Non Option Equity Instruments Granted Weighted Average Exercise Price

+ References

No definition available.

+ Details

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X

- Definition

Amount of expense for employee benefit and equity-based compensation.

+ References

No definition available.

+ Details

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X

- 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

Net number of non-option equity instruments granted to participants.

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

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