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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($) Segment | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Accounting Policies [Line Items] |  |  |
Number of reporting segments | Segment | 4 |  |
Loans disbursed under credit agreement secured by cash, percentage | 100.00% |  |
Restricted cash and cash equivalents | $ 10.0 | $ 49.8 |
Certificates of deposit, at carrying value | 8.6 | 10.4 |
Securitization of letters of credit | 1.4 | 1.4 |
Restricted cash for securitization |  | 38.0 |
Costs of other goods and services included in educational services and facilities expense | 12.9 | 20.0 | $ 26.0
Advertising costs | 154.9 | $ 220.5 | $ 253.0
Title IV Programs [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Student fund portion in cash, cash equivalents, restricted cash and short term investments | $ 3.5 |  |
Minimum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Number of days past due to write off student receivables | 90 days |  |
Maximum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Maturity period of cash equivalents including short-term investments | 90 days |  |
Student Loans [Member] | Minimum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Student receivables period | 1 year |  |
Student Loans [Member] | Minimum [Member] | Non Current Assets [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Student receivables period | 1 year |  |
Student Loans [Member] | Maximum [Member] | Current Assets [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Student receivables period | 1 year |  |
Student Loans [Member] | Maximum [Member] | Non Current Assets [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Student receivables period | 4 years |  |
Cash Receipts [Member] | Credit Concentration Risk [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Percentage of cash receipts from Title IV Program funding | 76.00% | 77.00% | 78.00%

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- Definition Amount of funds authorized by students to be retained which are in excess of tuition billings. + References No definition available. + Details
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- Definition Costs of other goods and services included in educational services and facilities expense. + References No definition available. + Details
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- Definition The percentage of cash collateralization for amounts borrowed under existing revolving credit facility. + References No definition available. + Details
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- Definition The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage under our Credit Agreement for borrowings outstanding as of the period end date. + References No definition available. + Details
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611 + Details
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- Definition The current cash, cash equivalents and investments that are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes current cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Threshold period past due for trade accounts receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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