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Other Long-Term Liabilities (Tables)
 12 Months Ended
Dec. 31, 2016
Other Long-Term Liabilities [Abstract]  
Schedule of other long-term liabilities

Other long-term liabilities consist of the following as of December 31, 2015 and 2016 (in thousands):

 

 

 

 

 

 

 

 

 

 

2015

    

2016

Deferred payments related to acquisitions

 

$
6,078

 

$
13,754

Deferred revenue, net of current portion

 

 
14,429

 

 
17,981

Loss on facilities not in use

 

 
15,229

 

 
7,813

Deferred rent and other facility costs

 

 
8,993

 

 
8,251

Lease incentives

 

 
3,125

 

 
2,684

Deferred gain on sale of campus building

 

 
133

 

 

 —

Other long-term liabilities

 

$
47,987

 

$
50,483