INVESTMENT SECURITIES (Schedule of Available for Sale Securities in Continuous Unrealized Loss Position and Approximate Fair Value of Investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Available for Sale Securities, Fair Value
Less Than 12 Months	$ 251,131	$ 530,647
12 Months or Longer	294,023	73,051
Total	545,154	603,698
Approximate Fair Value
Less Than 12 Months	(18,127)	(14,478)
12 Months or Longer	(35,380)	(2,383)
Total	(53,507)	(16,861)
Held to Maturity Securities, Fair Value
Less Than 12 Months	100,314	73,282
12 Months or Longer		0
Total	100,314	73,282
Held to Maturity Securities, Unrealized Losses
Less Than 12 Months	(6,502)	(294)
12 Months or Longer		0
Total	(6,502)	(294)
Approximate Fair Value
Fair Value, Less than 12 months	351,445	603,929
Fair Value, 12 months or longer	294,023	73,051
Fair Value	645,468	676,980
Unrealized Losses
Unrealized Losses, Less than 12 months	(24,629)	(14,772)
Unrealized Losses, 12 months or longer	(35,380)	(2,383)
Unrealized Losses	(60,009)	(17,155)
U.S. Government-Sponsored Agencies [Member]
Available for Sale Securities, Fair Value
Less Than 12 Months	90,578	243,187
12 Months or Longer	127,685	29,034
Total	218,263	272,221
Approximate Fair Value
Less Than 12 Months	(9,277)	(6,858)
12 Months or Longer	(17,221)	(966)
Total	(26,498)	(7,824)
Held to Maturity Securities, Fair Value
Less Than 12 Months	38,018	24,975
12 Months or Longer		0
Total	38,018	24,975
Held to Maturity Securities, Unrealized Losses
Less Than 12 Months	(1,982)	(25)
12 Months or Longer		0
Total	(1,982)	(25)
Mortgage-Backed Securities-Residential [Member]
Available for Sale Securities, Fair Value
Less Than 12 Months	132,068	265,403
12 Months or Longer	156,945	33,455
Total	289,013	298,858
Approximate Fair Value
Less Than 12 Months	(7,083)	(7,053)
12 Months or Longer	(16,959)	(884)
Total	(24,042)	(7,937)
Held to Maturity Securities, Fair Value
Less Than 12 Months	62,296	48,307
12 Months or Longer		0
Total	62,296	48,307
Held to Maturity Securities, Unrealized Losses
Less Than 12 Months	(4,520)	(269)
12 Months or Longer		0
Total	(4,520)	(269)
SBA Pool Securities [Member]
Available for Sale Securities, Fair Value
Less Than 12 Months	24,484	22,057
12 Months or Longer	9,393	10,562
Total	33,877	32,619
Approximate Fair Value
Less Than 12 Months	(1,653)	(567)
12 Months or Longer	(1,200)	(533)
Total	(2,853)	$ (1,100)
State and Political Subdivisions [Member]
Available for Sale Securities, Fair Value
Less Than 12 Months	1,609
12 Months or Longer	0
Total	1,609
Approximate Fair Value
Less Than 12 Months	(6)
12 Months or Longer	0
Total	(6)
Corporate Bond [Member]
Available for Sale Securities, Fair Value
Less Than 12 Months	2,392
12 Months or Longer	0
Total	2,392
Approximate Fair Value
Less Than 12 Months	(108)
12 Months or Longer	0
Total	$ (108)