INVESTMENT SECURITIES (Schedule of amortized cost and fair value of securities available-for-sale) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Investment securities available for sale, at fair value	$ 543,769	$ 266,096
Available-for-sale Securities.
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	546,298	262,749
Gross Unrealized/Unrecognized Gains	1,538	3,596
Gross Unrealized/Unrecognized Losses	(4,067)	(249)
Investment securities available for sale, at fair value	543,769	266,096
Available-for-sale Securities. \| Residential mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	442,818	192,163
Gross Unrealized/Unrecognized Gains	1,248	2,599
Gross Unrealized/Unrecognized Losses	(2,911)	(74)
Investment securities available for sale, at fair value	441,155	194,688
Available-for-sale Securities. \| Commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,733	32,589
Gross Unrealized/Unrecognized Gains	286	997
Gross Unrealized/Unrecognized Losses	(200)	(94)
Investment securities available for sale, at fair value	18,819	33,492
Available-for-sale Securities. \| Asset-backed Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,880
Gross Unrealized/Unrecognized Gains	0
Gross Unrealized/Unrecognized Losses	(32)
Investment securities available for sale, at fair value	4,848
Available-for-sale Securities. \| U.S. Government agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	67,994	37,997
Gross Unrealized/Unrecognized Gains	0	0
Gross Unrealized/Unrecognized Losses	(740)	(81)
Investment securities available for sale, at fair value	67,254	$ 37,916
Available-for-sale Securities. \| Securities issued by states and political subdivisions in the U.S
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,873
Gross Unrealized/Unrecognized Gains	4
Gross Unrealized/Unrecognized Losses	(184)
Investment securities available for sale, at fair value	$ 11,693

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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