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Notes Payable and Other Noncurrent Liabilities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011
Line Of Credit Facility Covenant Compliance [Line Items] |  |
Increase in the term loan | $ 100,000 |
Maturity date of the University's existing loan, before amendment | December 31, 2019 |
Decreased the interest rate on the outstanding balance | from the BBA Libor Rate plus 200 basis points to the BBA Libor Rate plus 175 basis points |
Interest rate on the outstanding balance, before amendment, basis points | 2.00% |
Interest rate on the outstanding balance, after amendment, basis points | 1.75% |
Amount of revolving line of credit | 50,000 |
Revolving line of credit facility, expiration date | Dec. 31, 2017 |
Amount available to be borrowed on the line of credit | 50,000 |
Long-term deferred rent | 7,015 | 6,512
Derivative liability for forward interest rate swap | $ 390 | $ 628

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