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Equity (Details) - USD ($)
 1 Months Ended 2 Months Ended 3 Months Ended 12 Months Ended
May 31, 2017
May 04, 2017
Feb. 06, 2017
Jan. 31, 2017
Jan. 05, 2017
Jan. 31, 2017
Mar. 31, 2017
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Class of Stock [Line Items]                    
Issuance of common stock (in shares)     310,376,634              
Proceeds from initial offering             $ 1,692,058,000 $ 1,692,058,000 $ 0  
Offering costs paid             $ 5,426,000 $ 2,457,000 0  
Common stock, shares outstanding (in shares)             310,376,634 310,376,634    
Preferred shares, shares outstanding (in shares)             0 0    
Common stock, shares issued (in shares)                   1,000
Preferred stock, shares issued (in shares)                   113
Preferred stock, dividend rate, percentage                   12.00%
Contributions by investors       $ 1,153,000       $ 1,153,000 0  
Dividends, preferred stock, cash paid                 0 $ 0
Preferred stock, amount of preferred dividends in arrears                   0
Payments of dividends               0 0  
Proceeds from contributed capital               $ 0 $ 128,002,000  
Profit interests, cancellations           $ 19,686,000        
Profit interests, distributions           19,686,000        
Class B Units                    
Class of Stock [Line Items]                    
Profit interests, notes receivable distributed           $ 11,023,000        
Profit interests, notes receivable issued                   20,228,000
Profit interests, notes receivable accrued interest                   $ 1,527,000
Profit interests, cancellations         $ 7,723,000          
Restricted Stock Units (RSUs)                    
Class of Stock [Line Items]                    
Shares granted (in shares)               3,290,126    
Scenario, Forecast                    
Class of Stock [Line Items]                    
Common stock, dividends per share (in dollars per share) $ 0.06                  
Subsequent Event                    
Class of Stock [Line Items]                    
Common stock, dividends, per share, declared (in dollars per share)   $ 0.06                
IH2                    
Class of Stock [Line Items]                    
Common stock, shares outstanding (in shares)                   1,000
Preferred shares, shares outstanding (in shares)                   113
IH1 | Class B Units                    
Class of Stock [Line Items]                    
Profit interests, distributions         $ 11,963,000          
Minimum | Class B Units                    
Class of Stock [Line Items]                    
Profit interests, notes receivable applicable interest rate                   1.57%
Maximum | Class B Units                    
Class of Stock [Line Items]                    
Profit interests, notes receivable applicable interest rate                   1.97%