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Cash and cash equivalents | 12 Months Ended
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Dec. 31, 2017
Cash and cash equivalents [Abstract] |
Cash and cash equivalents |
4. | Cash and cash equivalents
Cash and cash equivalents represent cash on hand, cash held at bank, and time deposits placed with banks or other financial institutions, which have original maturities of three months or less. Cash on hand and cash held at bank balance as of December 31, 2016 and 2017 primarily consist of the following currencies:
|  | December 31, 2016 |  | December 31, 2017 |
(In thousands) |  | Amount |  | USD equivalent |  | Amount |  | USD equivalent |
RMB |  |  | 538,660 |  |  | 77,651 |  |  | 436,794 |  |  | 66,847 |
USD |  |  | 121,726 |  |  | 121,726 |  |  | 166,530 |  |  | 166,530 |
HKD |  |  | 987 |  |  | 127 |  |  | 794 |  |  | 102 |
Total |  |  |  |  |  | 199,504 |  |  |  |  |  | 233,479 |
As at December 31, 2016 and 2017, included in the cash and cash equivalents are time deposits with original maturities of three months or less, of USD 115,944,000 and USD 115,534,000, primarily consist of USD.

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- Definition The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -URI http://asc.fasb.org/topic&trid=2122426 + Details
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