Summary of Significant Accounting Policies (Details)
¥ in Thousands
12 Months Ended
Dec. 31, 2015
CNY (¥)
entity
¥ / $
Dec. 31, 2014
CNY (¥)
Dec. 31, 2013
CNY (¥)
Basis of presentation and consolidation, information pertaining to Company or its subsidiaries      
Number of entities in which the Company has variable interest but is not the primary beneficiary | entity 0    
Convenience translation      
Rate for translation of balances of financial statements from RMB to US$ | ¥ / $ 6.4778    
Available-for-sale securities      
Dividend income ¥ 10,781 ¥ 483 ¥ 185
Accounts receivable and allowance for doubtful accounts      
Allowance for doubtful accounts ¥ 862 ¥ 1,130 ¥ 0
Office building      
Investments in real estate      
Estimated useful lives 30 years    
Office building improvements      
Investments in real estate      
Estimated useful lives 10 years    
Computer and software      
Investments in real estate      
Estimated useful lives 3 years    
Furniture, fixtures and other equipment      
Investments in real estate      
Estimated useful lives 3 years    
Motor vehicles      
Investments in real estate      
Estimated useful lives 4 years