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Share-Based Compensation Summary of RSAs and RSUs (Details) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended
Feb. 01, 2017
Jan. 31, 2017
Jan. 31, 2017
Mar. 31, 2017
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, allocated share-based compensation expense         $ 44,244,000 $ 4,206,000
Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, non-option equity instrument, granted (in shares)   62,529        
Share-based compensation arrangement, vested, number (in shares)       51,039.000 51,039.000  
Share-based compensation expense   $ (246,000)        
Restricted Stock and Restricted Stock Units Outstanding            
Balance, January 1, 2017 (in shares)     0   0  
Granted (in shares)         62,529  
Vested (in shares)         (51,039)  
Forfeited (in shares)         0  
Balance, March 31, 2017 (in shares)       11,490 11,490  
Restricted Stock and Restricted Stock Units Weighted Average Grant Date Fair Value            
Beginning Balance (in dollars per share)     $ 0.00   $ 0.00  
Granted (in dollars per share)         15.50  
Vested (in dollars per share)         (15.88)  
Forfeited (in dollars per share)         (0.00)  
Ending Balance (in dollars per share)       $ 13.83 $ 13.83  
Restricted Stock and Restricted Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, vested in period, fair value         $ (28,912,000)  
Restricted Stock and Restricted Stock Units Outstanding            
Balance, January 1, 2017 (in shares)     0   0  
Granted (in shares)         3,352,655  
Vested (in shares)         (1,456,109)  
Forfeited (in shares)         (51,252)  
Balance, March 31, 2017 (in shares)       1,845,294 1,845,294  
Restricted Stock and Restricted Stock Units Weighted Average Grant Date Fair Value            
Beginning Balance (in dollars per share)     $ 0.00   $ 0.00  
Granted (in dollars per share)         19.92  
Vested (in dollars per share)         (19.86)  
Forfeited (in dollars per share)         (20.00)  
Ending Balance (in dollars per share)       $ 19.96 $ 19.96  
Restricted Stock Units (RSUs)            
Restricted Stock and Restricted Stock Units Outstanding            
Balance, January 1, 2017 (in shares)     0   0  
Granted (in shares)         3,290,126  
Vested (in shares)         (1,405,070)  
Forfeited (in shares)         (51,252)  
Balance, March 31, 2017 (in shares)       1,833,804 1,833,804  
Restricted Stock and Restricted Stock Units Weighted Average Grant Date Fair Value            
Beginning Balance (in dollars per share)     $ 0.00   $ 0.00  
Granted (in dollars per share)         20.00  
Vested (in dollars per share)         (20.00)  
Forfeited (in dollars per share)         (20.00)  
Ending Balance (in dollars per share)       $ 20.00 $ 20.00  
Class B Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, non-option equity instrument, granted (in shares)         9,838  
Share-based compensation arrangement, vested, number (in shares)   40,992 40,992      
Omnibus Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, number of shares authorized (in shares) 16,000,000          
Restricted Stock and Restricted Stock Units Outstanding            
Balance, March 31, 2017 (in shares)       3,290,126 3,290,126  
Supplemental Bonus Plan | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, non-option equity instrument, granted (in shares) 2,979,001          
Share-based compensation arrangement, aggregate fair value granted during period       $ 59,580,000    
IH6 Bonus Awards | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, aggregate fair value granted during period       4,825,000    
Share-based compensation arrangement, vested, number (in shares) 241,250          
IH6 Bonus Awards | Class B Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, non-option equity instrument, granted (in shares)     9,650      
Completion of IPO | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, award vesting rights, percentage 33.00%          
Anniversary One | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, award vesting rights, percentage 33.00%          
Anniversary Two | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, award vesting rights, percentage 33.00%          
Director | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement, non-option equity instrument, granted (in shares)         69,875  
Share-based compensation arrangement, aggregate fair value granted during period       $ 1,398,000