INVESTMENTS (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Schedule of Investments [Line Items]
Trading securities	$ 4,124		$ 4,428
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Net unrealized loss on available-for-sale debt securities, net of tax	73,984		1,173
Deferred tax assets, unrealized losses on available for sale securities	20,300		321
Debt Securities, Available-for-sale, Realized Gain (Loss)	0	$ 0
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0		0
Debt Securities, Held-to-Maturity, Excluded Accrued Interest from Amortized Cost	8		10
Security pledged as collateral, amortized cost	699,900		640,100
Security pledged as collateral, fair value	654,700		641,200
Available-for-sale Securities
Schedule of Investments [Line Items]
Interest Receivable	$ 3,600		$ 3,400