Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(2))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(1)(a))
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Name:	us-gaap_RestrictedCashAndCashEquivalents
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The Transaction - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended
	Jul. 01, 2018	Mar. 31, 2019	Mar. 31, 2018
The Transaction
Loss on transaction		$ 4,088	$ 550
Amended and restated credit agreement
The Transaction
Restricted collateral	$ 61,667
Grand Canyon University [Member]
The Transaction
Cash transferred	34,107
Grand Canyon University [Member] \| Asset Purchase Agreement
The Transaction
Purchase price of assets	$ 870,100
Interest rate on Secured Note	6.00%
Term of additional lending to GCU for approved capital expenditures	3 years
Grand Canyon University [Member] \| Master Services Agreement [Member]
The Transaction
Percentage of tuition and fee revenue used for closing of purchase agreement	60.00%