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STOCK INCENTIVE PLANS - Restricted Stock Units Activity (Detail) - $ / shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Shares, unvested units outstanding at end of period (in shares) 4,873,368  
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Shares, unvested units outstanding at beginning of period (in shares) 2,858,357 2,556,174
Shares, granted (in shares) 1,988,225 0
Shares, vested (in shares) (1,717) (295,616)
Shares, forfeited/expired (in shares) (11,362) (10,442)
Shares, dividend reinvestment (in shares) 39,865 22,701
Shares, unvested units outstanding at end of period (in shares) 4,873,368 2,272,817
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 price, invested units outstanding at beginning of period (in USD per share) $ 12.56 $ 13.51
Weighted average grant price, granted (in USD per share) 6.95 0
Weighted average grant price, vested (in USD per share) 14.15 13.28
Weighted average grant price, forfeited/expired (in USD per share) 12.85 13.66
Weighted average grant price, dividend reinvestment (in USD per share) 8.57 11.91
Weighted average grant price, invested units outstanding at end of period (in USD per share) $ 10.23 $ 13.52