Share-based Compensation - Summary of Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total non-cash stock compensation	$ 1,984	$ 3,149
Continuing operations
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total non-cash stock compensation	1,981	2,987
Continuing operations | Stock options, net of estimated forfeitures
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total non-cash stock compensation	439	823
Continuing operations | Restricted stock awards
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total non-cash stock compensation	1,542	2,164
Discontinued operations
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total non-cash stock compensation	$ 3	$ 162