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Equity-Based Compensation - Summary of Restricted Stock Award and Restricted Stock Unit Activity (Detail) - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Service-Based Awards      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Outstanding RSAs/RSUs-Beginning Balance (in shares) 523 602 892
RSAs/RSUs granted (in shares) 687 401 272
RSAs/RSUs settled (in shares) (249) (399) (417)
RSAs/RSUs forfeited (in shares) (33) (81) (145)
Outstanding RSAs/RSUs-Ending Balance (in shares) 928 523 602
Vested RSAs/RSUs (in shares) 38 7  
Nonvested RSAs/RSUs (in shares) 890 516  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Weighted-Average Grant-Date Fair Value per RSA/RSU, Outstanding Beginning Balance (in dollars per share) $ 18.42 $ 17.06 $ 16.93
Weighted-Average Grant-Date Fair Value per RSA/RSU, granted (in dollars per share) 16.02 19.42 17.51
Weighted-Average Grant-Date Fair Value per RSA/RSU, settled (in dollars per share) 18.03 17.46 17.75
Weighted-Average Grant-Date Fair Value per RSA/RSU, forfeited (in dollars per share) 17.86 18.05 15.13
Weighted-Average Grant-Date Fair Value per RSA/RSU, Outstanding Ending Balance (in dollars per share) 16.77 18.42 $ 17.06
Vested RSAs/RSUs (in dollars per share) 15.52 19.11  
Nonvested RSAs/RSUs (in dollars per share) $ 16.82 $ 18.41  
Performance-Based Awards - Performance Vesting      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Outstanding RSAs/RSUs-Beginning Balance (in shares) 32 153 119
RSAs/RSUs granted (in shares) 24 57 192
RSAs/RSUs settled (in shares) (33) (153) (119)
RSAs/RSUs forfeited (in shares) (23) (25) (39)
Outstanding RSAs/RSUs-Ending Balance (in shares) 0 32 153
Vested RSAs/RSUs (in shares) 0 32  
Nonvested RSAs/RSUs (in shares) 0 0  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Weighted-Average Grant-Date Fair Value per RSA/RSU, Outstanding Beginning Balance (in dollars per share) $ 19.52 $ 17.45 $ 14.07
Weighted-Average Grant-Date Fair Value per RSA/RSU, granted (in dollars per share) 17.20 19.52 17.45
Weighted-Average Grant-Date Fair Value per RSA/RSU, settled (in dollars per share) 19.46 17.45 14.07
Weighted-Average Grant-Date Fair Value per RSA/RSU, forfeited (in dollars per share) 17.20 19.52 17.45
Weighted-Average Grant-Date Fair Value per RSA/RSU, Outstanding Ending Balance (in dollars per share) 0 19.52 $ 17.45
Vested RSAs/RSUs (in dollars per share) 0 19.52  
Nonvested RSAs/RSUs (in dollars per share) $ 0 $ 0  
Performance-Based Awards - Market Vesting      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Outstanding RSAs/RSUs-Beginning Balance (in shares) 297 211 972
RSAs/RSUs granted (in shares) 247 204 104
RSAs/RSUs settled (in shares) (53) (41) 0
RSAs/RSUs forfeited (in shares) (236) (77) (865)
Outstanding RSAs/RSUs-Ending Balance (in shares) 255 297 211
Vested RSAs/RSUs (in shares) 45 50  
Nonvested RSAs/RSUs (in shares) 210 247  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Weighted-Average Grant-Date Fair Value per RSA/RSU, Outstanding Beginning Balance (in dollars per share) $ 16.79 $ 16.46 $ 9.01
Weighted-Average Grant-Date Fair Value per RSA/RSU, granted (in dollars per share) 15.35 17.41 18.58
Weighted-Average Grant-Date Fair Value per RSA/RSU, settled (in dollars per share) 12.36 20.76 0
Weighted-Average Grant-Date Fair Value per RSA/RSU, forfeited (in dollars per share) 16.52 15.36 8.35
Weighted-Average Grant-Date Fair Value per RSA/RSU, Outstanding Ending Balance (in dollars per share) 16.56 16.79 $ 16.46
Vested RSAs/RSUs (in dollars per share) 18.58 12.03  
Nonvested RSAs/RSUs (in dollars per share) $ 16.11 $ 17.75