Other Long-Term Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Other Long-Term Liabilities [Abstract]

Schedule of other long-term liabilities

Other long-term liabilities consist of the following as of December 31, 2016 and 2017 (in thousands):

	2016		2017
Deferred revenue, net of current portion	$	17,981	$	21,033
Deferred rent and other facility costs		8,251		7,113
Deferred payments related to acquisitions		13,754		6,385
Loss on facilities not in use		7,813		5,652
Lease incentives		2,684		2,832
Other long-term liabilities	$	50,483	$	43,015