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Share-based Compensation and Equity - Summary of Share-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total non-cash stock compensation	$ 13,298	$ 12,994	$ 10,791
Continuing operations
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total non-cash stock compensation	10,248	10,325	6,574
Continuing operations | Stock options, net of estimated forfeitures
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total non-cash stock compensation	1,291	3,101	(3,610)
Continuing operations | Restricted stock awards
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total non-cash stock compensation	8,957	7,224	10,184
Discontinued operations
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total non-cash stock compensation	$ 3,050	$ 2,669	$ 4,217

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 10
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-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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