Summary of Principal Accounting Policies (Details 8) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings per share      
Net income (loss) attributable to E-House ordinary shareholders - basic $ 40,001,485 $ 51,957,425 $ (56,971,404)
Increase (Decrease) of income from Leju (2,208,892)    
Interest of Convertible Senior Notes (including stated interest and amortization of discount and issuance costs)   192,566  
Net income (loss) attributable to E-House ordinary shareholders diluted 37,792,593 52,149,991 (56,971,404)
Weighted average ordinary shares outstanding - basic 139,211,442 130,163,165 106,159,388
Convertible senior notes   334,821  
Share options and restricted shares 7,476,393 5,282,011  
Weighted average number of ordinary shares outstanding diluted 146,687,835 135,779,997 106,159,388
Basic earnings (loss) per share $ 0.29 $ 0.40 $ (0.54)
Diluted earnings (loss) per share $ 0.26 $ 0.38 $ (0.54)
Diluted earnings (loss) per share that does not include instruments whose inclusion would be anti-dilutive      
Net income (loss) allocated 12,335,673 (871,136) (14,077,967)
Non-controlling interest 152,376,115 13,933,276  
Effects of changes in E-House's ownership interest in CRIC, Leju and other significantly less than wholly owned subsidiaries on equity attributable to E-House      
Net income (loss) attributable to E-House 40,001,485 51,957,425 (56,971,404)
Transfers to the non-controlling interest:      
Increase in E-house Equity by partial disposal of subsidiaries 138,477,580    
Increase in E-House's additional paid-in capital for issuing Leju's shares to Public 70,068,096    
Decrease in E-House's additional paid-in capital for acquisition of non-controlling interest (30,720,088)    
Net transfers from (to) non-controlling interest 156,314,900    
Change from net income attributable to E-House and transfers (to) from non-controlling interest 196,316,385    
Share options and restricted shares      
Diluted earnings (loss) per share that does not include instruments whose inclusion would be anti-dilutive      
Instruments excluded from computation of diluted earnings (loss) per share as their inclusion would have been anti-dilutive (in shares)     14,660,788
Convertible senior notes      
Diluted earnings (loss) per share that does not include instruments whose inclusion would be anti-dilutive      
Instruments excluded from computation of diluted earnings (loss) per share as their inclusion would have been anti-dilutive (in shares) 8,959,127    
CRIC      
Diluted earnings (loss) per share that does not include instruments whose inclusion would be anti-dilutive      
Net income (loss) allocated     (13,547,386)
Effects of changes in E-House's ownership interest in CRIC, Leju and other significantly less than wholly owned subsidiaries on equity attributable to E-House      
Net income (loss) attributable to E-House   51,957,425 (56,971,404)
Transfers to the non-controlling interest:      
Decrease in E-House's additional paid-in capital for purchase of 64,642,647 CRIC common shares for the years ended December 31, 2012 respectively     (149,461,182)
Purchase of common shares to effect changes in E-house's ownership interest (in shares)     64,642,647
Increase (Decrease) in E-House's additional paid-in capital for the exercise of Online's options and the vesting of Online's restricted shares     (332,951)
Net transfers from (to) non-controlling interest     (149,794,133)
Change from net income attributable to E-House and transfers (to) from non-controlling interest   51,957,425 (206,765,537)
Leju Holdings Ltd.      
Diluted earnings (loss) per share that does not include instruments whose inclusion would be anti-dilutive      
Net income (loss) allocated 50,702,835    
Ownership interest (as a percent) 69.90%    
Non-controlling interest 124,892,590    
Transfers to the non-controlling interest:      
Decrease in E-House additional paid-in capital for Leju share distribution to E-house shareholders (21,569,028)    
Increase (Decrease) in E-House's additional paid-in capital for the exercise of Online's options and the vesting of Online's restricted shares $ 58,340