Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Long-Term Liabilities [Abstract]
Deferred payments related to acquisition	$ 14,415	$ 6,078
Deferred revenue, net of current portion	13,827	14,429
Loss on facilities not in use	9,999	15,229
Deferred rent and other facility costs	8,936	8,993
Lease incentives	2,896	3,125
Deferred gain on sale of campus building		133
Total other long-term liabilities	$ 50,073	$ 47,987