Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Revenue Recognition (Schedule of Changes in deferred revenue) (Details)

v3.10.0.1
Revenue Recognition (Schedule of Changes in deferred revenue) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Revenue Recognition [Abstract]    
Deferred revenue [1] $ 69,111 $ 68,108
[1] Includes $16.0 million and $15.2 million under long term deferred revenue in the Company's consolidated balance sheets as of September 30, 2018 and December 31, 2017, respectively.