Post-effective amendment to a registration statement that is not immediately effective upon filing

Share-based Compensation - Summary of Activity of Restricted Shares (Detail)

v3.21.2
Share-based Compensation - Summary of Activity of Restricted Shares (Detail) - $ / shares
 1 Months Ended 6 Months Ended
Dec. 31, 2020
Jun. 30, 2021
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Restricted Shares, Opening balance   1,250,000
Number of Restricted Shares, Granted 1,300,000 1,105,700
Number of Restricted Shares, Vested 50,000 0
Number of Restricted Shares, Vested   (145,600)
Number of Restricted Shares, Ending balance 1,250,000 2,210,100
Weighted Average Grant Date Fair Value, Opening balance   $ 15.28
Weighted Average Grant Date Fair Value, Granted $ 15.30 14.62
Weighted Average Grant Date Fair Value, Forfeited 0 14.10
Weighted Average Grant Date Fair Value, Ending balance $ 15.28 $ 14.94
Performance Condition Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares, Non-vested Opening balance   950,000
Shares, Granted 950,000 713,700
Shares, Forfeited 0 (85,600)
Shares, Non-vested Ending balance 950,000 1,578,100
Weighted Average Grant Date Fair Value, Beginning balance   $ 15.70
Weighted Average Grant Date Fair Value, Granted $ 15.70 16.15
Weighted Average Grant Date Fair Value, Forfeited 0 16.15
Weighted Average Grant Date Fair Value, Ending balance $ 15.70 $ 15.81
Service Condition Shares [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares, Non-vested Opening balance   200,000
Shares, Granted   52,000
Shares, Non-vested Ending balance 200,000 252,000
Weighted Average Grant Date Fair Value, Beginning balance   $ 15.70
Weighted Average Grant Date Fair Value, Granted   16.15
Weighted Average Grant Date Fair Value, Ending balance $ 15.70 $ 15.79
Market Condition Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares, Non-vested Opening balance   100,000
Shares, Granted 100,000 340,000
Shares, Forfeited 0 (60,000)
Shares, Non-vested Ending balance 100,000 380,000
Weighted Average Grant Date Fair Value, Beginning balance   $ 10.45
Weighted Average Grant Date Fair Value, Granted $ 10.45 11.17
Weighted Average Grant Date Fair Value, Forfeited 0 11.17
Weighted Average Grant Date Fair Value, Ending balance $ 10.45 $ 10.76