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Other Long-Term Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Other Long-Term Liabilities [Abstract]    
Deferred payments related to acquisition $ 13,754 $ 6,078
Deferred revenue, net of current portion 17,981 14,429
Loss on facilities not in use 7,813 15,229
Deferred rent and other facility costs 8,251 8,993
Lease incentives 2,684 3,125
Deferred gain on sale of campus building   133
Total other long-term liabilities $ 50,483 $ 47,987