At December 31, 2014. intangible assets with definite lives are as follows Gross carrying amount Accumulated amortization Net Weighted- average useful life (years) (dollars in thousands) Customer lists $ 19,060 $ (10.707) $ 8,263 2.9 Content 9,802 (1,024) 8,778 4.0 Trade names 8,627 (3,001) 5,626 2.8 Technology 5,390 (2,744) 2,646 2.5 Franchise rights and other 2,000 (258) 1,742 4.8 Total S 44,879 $ (17.824) $ 27,055 3.1 F-39 Table of At December 31. 2014. amortization of intangible assets with definite lives for each of the next five years is estimated to be as follows: Years ending December 31, (In thousands) 2015 12,312 2016 6,981 2017 5.504 2018 1.931 2019 327 Total 27,055 Note 5—Long-term Investments Long-term investments consist of. December 31, 2013 2014 (In thousands) Cost method investments $ 51,033 $ 55,569 Long-term marketable equity security 9,360 7,410 Total long-term investments 60,393 $ 62,979 Investment In Zhenai, Inc. The Company has a 20% interest in the voting common stock of Zhenai Inc. ("Zhenai"), a leading provider of online dating and matchmaking services in China. Our voting power is limited by a shareholders agreement. In light of this limitation and the significance of our interest relative to other shareholders, we do not have the ability to exercise significant influence over the operating and financial matters of Zhenai and this investment is accounted for as a cost method investment. Long-term marketable equity security The cost basis of the Company's long-term marketable equity security at December 31. 2013 and 2014 is $8.7 million, with a gross unrealized gain of $0.7 million and a gross unrealized loss of $1.2 milhon at December 31. 2013 and 2014, respectively, which are included in "Accumulated other comprehensive loss" in the accompanying combined balance sheet. The Company evaluated the near-term prospects of the issuer in relation to the severity a