INCOME TAXES- Components of income tax expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current income tax expense	$ 18,421	$ 16,986	$ 14,073
Deferred income tax expense (benefit):
Adjustment for enacted changes in tax law	0	0	15,402
Reversal of deferred tax asset valuation allowance	(8,000)	0	(63,228)
Other deferred income tax expense (benefit)	3,629	55,009	22,783
Total income tax expense (benefit)	$ 14,050	$ 71,995	$ (10,970)