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Stock-Based Compensation - Restricted Stock Awards Granted (Detail) - Restricted Stock [Member] - shares
3 Months Ended
Feb. 17, 2016
Feb. 12, 2016
Mar. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock awards Grants     699,637
February 2016 Award Date [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock awards Grants 36,364 663,273 699,637
February 2016 Award Date [Member] | Restricted Stock One [Member] | Tranche One [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock, vesting percentage 25.00% 50.00%  
Restricted stock, vesting date Nov. 30, 2016 Feb. 28, 2018  
February 2016 Award Date [Member] | Restricted Stock One [Member] | Vesting Quarterly Thereafter [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock, vesting percentage 6.25% 6.25%  
February 2016 Award Date [Member] | Restricted Stock Two [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock, vesting percentage   100.00%  
Restricted stock, vesting date   Feb. 28, 2017  
February 2016 Award Date [Member] | Restricted Stock Two [Member] | Tranche One [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock, vesting percentage 25.00%    
Restricted stock, vesting date Feb. 28, 2017    
February 2016 Award Date [Member] | Restricted Stock Two [Member] | Vesting Quarterly Thereafter [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock, vesting percentage 6.25%    
February 2016 Award Date [Member] | Restricted Stock Three [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock, vesting period   Vest ratably over 16 quarters