Equity-Based Compensation - Summary of Equity-Based Compensation Expense (Details 2) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity-Based Compensation
Restricted stock units	$ 5,015	$ 5,256	$ 4,184
CTS Cash Settled Awards [Member]
Equity-Based Compensation
Restricted stock units	255	131	72
Service-Based RSUs
Equity-Based Compensation
Restricted stock units	2,207	2,036	1,762
Performance-Based RSUs
Equity-Based Compensation
Restricted stock units	2,553	3,089	2,350
RSUs
Equity-Based Compensation
Restricted stock units	5,015	5,256	4,184
Income tax benefit	1,133	1,188	1,573
Share-based Payment Arrangement, Expense, after Tax	$ 3,882	$ 4,068	$ 2,611

Amount, after tax, of expense for award under share-based payment arrangement.

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+ References

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
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Amount of noncash expense for award of restricted stock or unit under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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