Schedule of Temporary Impairment Losses, Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule of Unrealized Losses and Estimated Fair Values [Line Items]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 745,893	$ 3,755
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(9,038)	(10)
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Investment Securities, Continuous Unrealized Loss Position, Fair Value, Total	745,893	3,755
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	(9,038)	(10)
Debt Securities, Held-to-maturity	554,225	361,844
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	5,499	8,017
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(3,904)	(10)
Securities held to maturity, fair value	555,820	369,851
US Government Agencies Debt Securities Commercial
Schedule of Unrealized Losses and Estimated Fair Values [Line Items]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	191,215
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1,268)
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Investment Securities, Continuous Unrealized Loss Position, Fair Value, Total	191,215
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	(1,268)
Residential Mortgage Backed Securities [Member]
Schedule of Unrealized Losses and Estimated Fair Values [Line Items]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	520,020	3,755
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(7,131)	(10)
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Investment Securities, Continuous Unrealized Loss Position, Fair Value, Total	520,020	3,755
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	(7,131)	(10)
Debt Securities, Held-to-maturity	384,392	277,351
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	3,712	5,389
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(2,645)	(10)
Securities held to maturity, fair value	385,459	282,730
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Unrealized Losses and Estimated Fair Values [Line Items]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	22,285
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(462)
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Investment Securities, Continuous Unrealized Loss Position, Fair Value, Total	22,285
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	(462)
Debt Securities, Held-to-maturity	21,747	0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0	0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(452)	0
Securities held to maturity, fair value	21,295	0
Obligations of States and Political Subdivisions [Member]
Schedule of Unrealized Losses and Estimated Fair Values [Line Items]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	7,237
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(138)
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Investment Securities, Continuous Unrealized Loss Position, Fair Value, Total	7,237
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	(138)
Debt Securities, Held-to-maturity	32,925	34,391
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	566	705
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(79)	0
Securities held to maturity, fair value	33,412	35,096
Corporate Debt Securities [Member]
Schedule of Unrealized Losses and Estimated Fair Values [Line Items]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5,136
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(39)
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Investment Securities, Continuous Unrealized Loss Position, Fair Value, Total	5,136
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	(39)
Obligations of U.S. Government-Sponsored Enterprises - Mortgage-Backed Securities - Commercial [Member]
Schedule of Unrealized Losses and Estimated Fair Values [Line Items]
Debt Securities, Held-to-maturity	8,527	9,737
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	275	344
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	0	0
Securities held to maturity, fair value	$ 8,802	$ 10,081