Discontinued Operations - Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current Assets:
Total current assets classified as held for disposition from discontinued operations	$ 9,218	$ 23,845
Current Liabilities:
Disposal Group, Including Discontinued Operation, Liabilities, Current, Total	3,731	15,450
Sale | MSLO
Current Assets:
Accounts receivable, net		16,602
Prepaid expenses and other current assets	9,218	7,243
Total current assets classified as held for disposition from discontinued operations	9,218	23,845
Property and equipment, net		580
Intangible assets, net		330,084
Total assets classified as held for disposition from discontinued operations	9,218	354,509
Current Liabilities:
Accounts payable and accrued expenses	3,731	11,927
Current portion of deferred revenue		3,523
Disposal Group, Including Discontinued Operation, Liabilities, Current, Total	3,731	15,450
Deferred income taxes		34,938
Other long-term liabilities		3,629
Total liabilities classified as held for disposition from discontinued operations	$ 3,731	$ 54,017