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Consolidated Statements of Shareholders' Equity ¥ in Thousands, $ in Thousands | Ordinary Shares [Member] Class A ordinary shares [Member] CNY (¥) shares | Ordinary Shares [Member] Class A ordinary shares [Member] USD ($) shares | Ordinary Shares [Member] Class B ordinary shares [Member] CNY (¥) shares | Ordinary Shares [Member] Class B ordinary shares [Member] USD ($) shares | Treasury stock [Member] CNY (¥) shares | Additional paid-in capital [Member] CNY (¥) | Additional paid-in capital [Member] USD ($) | Statutory reserves [Member] CNY (¥) | Statutory reserves [Member] USD ($) | (Accumulated deficit)/Retained earnings [Member] CNY (¥) | (Accumulated deficit)/Retained earnings [Member] USD ($) | Accumulated other comprehensive (loss)/income [Member] CNY (¥) | Accumulated other comprehensive (loss)/income [Member] USD ($) | Noncontrolling interests [Member] CNY (¥) | Noncontrolling interests [Member] USD ($) | CNY (¥) | USD ($)
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2013 | ¥ 18,530 |  | ¥ 22,053 |  |  | ¥ 1,734,993 |  | ¥ 50,330 |  | ¥ (194,601) |  | ¥ (60,127) |  | ¥ 3,857 |  | ¥ 1,575,035 |
Balance, number of shares at Dec. 31, 2013 | shares | 282,578,957 | 282,578,957 | 317,325,360 | 317,325,360 |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  | 53,181 |  |  |  |  |  |  |  |  |  | 53,181 |
Issuance of ordinary shares upon settlement of share-based awards | ¥ 426 |  |  |  |  | 9,217 |  |  |  |  |  |  |  |  |  | 9,643 |
Issuance of ordinary shares upon settlement of share-based awards, number of shares | shares | 6,928,776 | 6,928,776 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of ordinary shares |  |  |  |  | ¥ (241,344) |  |  |  |  |  |  |  |  |  |  | (241,344) |
Repurchase of ordinary shares, number of shares | shares |  |  |  |  | (32,168,584) |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of repurchased ordinary shares | ¥ (1,854) |  |  |  | ¥ 227,965 | (227,267) |  |  |  |  |  |  |  |  |  | (1,156) |
Cancellation of repurchased ordinary shares, number of shares | shares | (30,128,928) | (30,128,928) |  |  | 30,128,928 |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of restricted shares | ¥ (10) |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |
Cancellation of restricted shares, number of shares | shares | (168,752) | (168,752) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Appropriation to statutory reserves |  |  |  |  |  |  |  | 15,638 |  | (15,638) |  |  |  |  |  |  |
Fair value changes of available-for-sale investments |  |  |  |  |  |  |  |  |  |  |  | 40,283 |  |  |  | 40,283 |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  |  |  |  | 4,503 |  |  |  | 4,503 |
Issuance of ordinary shares for investment | ¥ 186 |  |  |  |  | 17,093 |  |  |  |  |  |  |  |  |  | 17,279 |
Issuance of ordinary shares for investment, number of shares | shares | 3,034,245 | 3,034,245 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of certain investment in a subsidiary |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,885) |  | (2,885) |
Net income |  |  |  |  |  |  |  |  |  | 263,091 |  |  |  | (972) |  | 262,119 |
Balance at Dec. 31, 2014 | ¥ 17,278 |  | ¥ 22,053 |  | ¥ (13,379) | 1,587,227 |  | 65,968 |  | 52,852 |  | (15,341) |  |  |  | 1,716,658 |
Balance, number of shares at Dec. 31, 2014 | shares | 262,244,298 | 262,244,298 | 317,325,360 | 317,325,360 | (2,039,656) |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  | 34,354 |  |  |  |  |  |  |  |  |  | 34,354 |
Issuance of ordinary shares upon settlement of share-based awards | ¥ 240 |  |  |  |  | 8,534 |  |  |  |  |  |  |  |  |  | 8,774 |
Issuance of ordinary shares upon settlement of share-based awards, number of shares | shares | 3,822,780 | 3,822,780 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of ordinary shares |  |  |  |  | ¥ (65,910) |  |  |  |  |  |  |  |  |  |  | (65,910) |
Repurchase of ordinary shares, number of shares | shares |  |  |  |  | (10,776,568) |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of repurchased ordinary shares | ¥ (785) |  |  |  | ¥ 79,289 | (79,011) |  |  |  |  |  |  |  |  |  | (507) |
Cancellation of repurchased ordinary shares, number of shares | shares | (12,816,224) | (12,816,224) |  |  | 12,816,224 |  |  |  |  |  |  |  |  |  |  |  |
Appropriation to statutory reserves |  |  |  |  |  |  |  | 4,343 |  | (4,343) |  |  |  |  |  |  |
Fair value changes of available-for-sale investments |  |  |  |  |  |  |  |  |  |  |  | 15,869 |  |  |  | 15,869 |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  |  |  |  | 22,813 |  |  |  | 22,813 |
Capital contribution received from noncontrolling shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  | 250 |  | 250 |
Net income |  |  |  |  |  |  |  |  |  | 73,584 |  |  |  | (1,199) |  | 72,385 |
Balance at Dec. 31, 2015 | ¥ 16,733 |  | ¥ 22,053 |  |  | 1,551,104 |  | 70,311 |  | 122,093 |  | 23,341 |  | (949) |  | 1,804,686 |
Balance, number of shares at Dec. 31, 2015 | shares | 253,250,854 | 253,250,854 | 317,325,360 | 317,325,360 |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  | 1,890 |  |  |  |  |  |  |  |  |  | 1,890 |
Issuance of ordinary shares upon settlement of share-based awards | ¥ 110 |  |  |  |  | 2,517 |  |  |  |  |  |  |  |  |  | 2,627 |
Issuance of ordinary shares upon settlement of share-based awards, number of shares | shares | 1,658,936 | 1,658,936 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Appropriation to statutory reserves |  |  |  |  |  |  |  | 7,635 |  | (7,635) |  |  |  |  |  |  |
Fair value changes of available-for-sale investments |  |  |  |  |  |  |  |  |  |  |  | 247,336 |  |  |  | 247,336 | $ 35,624
Foreign currency translation adjustment |  |  |  |  |  |  |  |  |  |  |  | 27,669 |  |  |  | 27,669 | 3,985
Net income |  |  |  |  |  |  |  |  |  | 80,611 |  |  |  | (2,391) |  | 78,220 | 11,265
Balance at Dec. 31, 2016 | ¥ 16,843 | $ 2,426 | ¥ 22,053 | $ 3,176 |  | ¥ 1,555,511 | $ 224,040 | ¥ 77,946 | $ 11,227 | ¥ 195,069 | $ 28,096 | ¥ 298,346 | $ 42,971 | ¥ (3,340) | $ (481) | ¥ 2,162,428 | $ 311,455
Balance, number of shares at Dec. 31, 2016 | shares | 254,909,790 | 254,909,790 | 317,325,360 | 317,325,360 |  |  |  |  |  |  |  |  |  |  |  |  |

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