STOCK-BASED COMPENSATION (Schedule of Unrecognized Compensation Awards) (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/Units | shares	2,675,275
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 14.83
Total Compensation Cost	$ 39,700
Unrecognized compensation cost	$ 20,000
RSUs | January 1, 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2018
Shares/Units | shares	154,732
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 27.54
Total Compensation Cost	$ 4,300
Weighted Average Period of Expense Recognition	36 months
Unrecognized compensation cost	$ 1,300
Vesting Dates	12/31/2020
RSUs | January 1, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2019
Shares/Units | shares	27,464
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 35.15
Total Compensation Cost	$ 1,000
Weighted Average Period of Expense Recognition	36 months
Unrecognized compensation cost	$ 600
Vesting Dates	12/31/2021
RSUs and PIUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/Units | shares	274,188
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 30.77
Total Compensation Cost	$ 8,500
Unrecognized compensation cost	$ 4,000
TSR PRSUs and TSR PIUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/Units | shares	1,522,910
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 10.11
Total Compensation Cost	$ 15,400
Unrecognized compensation cost	$ 7,900
TSR PRSUs | January 1, 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2017
Shares/Units | shares	386,220
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 12.61
Total Compensation Cost	$ 4,900
Weighted Average Period of Expense Recognition	48 months
Unrecognized compensation cost	$ 1,200
Performance Period	1/1/2017 - 12/31/2019
Vesting Dates	Quarterly in 2020
TSR PRSUs | January 1, 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2018
Shares/Units | shares	658,042
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 7.31
Total Compensation Cost	$ 4,800
Weighted Average Period of Expense Recognition	48 months
Unrecognized compensation cost	$ 2,400
Performance Period	1/1/2018 - 12/31/2020
Vesting Dates	Quarterly in 2021
TSR PRSUs | January 1, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2019
Shares/Units | shares	100,882
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 11.53
Total Compensation Cost	$ 1,200
Weighted Average Period of Expense Recognition	48 months
Unrecognized compensation cost	$ 900
Performance Period	1/1/2019 - 12/31/2021
Vesting Dates	Quarterly in 2022
TSR PIUs | January 1, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2019
Shares/Units | shares	377,766
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 12.03
Total Compensation Cost	$ 4,500
Weighted Average Period of Expense Recognition	48 months
Unrecognized compensation cost	$ 3,400
Performance Period	1/1/2019 - 12/31/2021
Vesting Dates	Quarterly in 2022
Relative TSR PRSUs and Relative TSR PIUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/Units | shares	878,177
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 18.05
Total Compensation Cost	$ 15,800
Unrecognized compensation cost	$ 8,100
Relative TSR PRSUs | January 1, 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2017
Shares/Units | shares	271,832
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 18.02
Total Compensation Cost	$ 4,900
Weighted Average Period of Expense Recognition	48 months
Unrecognized compensation cost	$ 1,200
Performance Period	1/1/2017 - 12/31/2019
Vesting Dates	Quarterly in 2020
Relative TSR PRSUs | January 1, 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2018
Shares/Units | shares	315,100
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 16.64
Total Compensation Cost	$ 5,200
Weighted Average Period of Expense Recognition	48 months
Unrecognized compensation cost	$ 2,600
Performance Period	1/1/2018 - 12/31/2020
Vesting Dates	Quarterly in 2021
Relative TSR PRSUs | January 1, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2019
Shares/Units | shares	60,158
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 19.33
Total Compensation Cost	$ 1,200
Weighted Average Period of Expense Recognition	48 months
Unrecognized compensation cost	$ 900
Performance Period	1/1/2019 - 12/31/2021
Vesting Dates	Quarterly in 2022
Relative TSR PIUs | January 1, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2019
Shares/Units | shares	231,087
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 19.67
Total Compensation Cost	$ 4,500
Weighted Average Period of Expense Recognition	48 months
Unrecognized compensation cost	$ 3,400
Performance Period	1/1/2019 - 12/31/2021
Vesting Dates	Quarterly in 2022
PIUs [Member] | January 1, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2019
Shares/Units | shares	91,992
Grant Date Average Fair Value Per Unit/ Share | $ / shares	$ 34.89
Total Compensation Cost	$ 3,200
Weighted Average Period of Expense Recognition	36 months
Unrecognized compensation cost	$ 2,100
Vesting Dates	12/31/2021