Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring and Related Charges (Details) $ in Thousands	1 Months Ended	12 Months Ended
Restructuring and Related Charges (Details) $ in Thousands	Oct. 31, 2013 item	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Campus location closed \| item	20
Lease marginal borrowing rate		4.50%
Restructuring charges		$ 3,920	$ 16,319	$ 3,414
Accounts payable and accrued expenses
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities		$ 6,400	$ 9,800