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Other Long-Term Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Other Long-Term Liabilities [Abstract]    
Loss on facilities not in use $ 23,102 $ 34,339
Deferred rent and other facility costs 8,893 8,258
Deferred payments related to acquisition 4,967 4,915
Deferred revenue, net of current portion 6,403 1,897
Lease incentives 1,093 1,353
Deferred gain on sale of campus building 484 694
Total other long-term liabilities $ 44,942 $ 51,456