Investment Securities (Gross Unrealized Losses and Fair Value by Length of Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	$ 40,723	$ 26,788
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	836	150
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	18,693	236
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	488	1
Available-for-sale securities, continuous unrealized loss position, fair value	59,416	27,024
Available-for-sale securities, continuous unrealized loss position, unrealized losses	1,324	151
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value	217,414	12,237
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses	2,863	63
Held-to-maturity securities, continuous unrealized loss position, fair value	217,414	12,237
Held-to-maturity securities, continuous unrealized loss position, unrealized losses	2,863	63
Mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	37,837	11,869
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	723	68
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	3,947
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	23
Available-for-sale securities, continuous unrealized loss position, fair value	41,784	11,869
Available-for-sale securities, continuous unrealized loss position, unrealized losses	746	68
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value	155,548	5,093
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses	2,302	18
Held-to-maturity securities, continuous unrealized loss position, fair value	155,548	5,093
Held-to-maturity securities, continuous unrealized loss position, unrealized losses	2,302	18
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	2,886	14,919
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	113	82
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	14,746	236
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	465	1
Available-for-sale securities, continuous unrealized loss position, fair value	17,632	15,155
Available-for-sale securities, continuous unrealized loss position, unrealized losses	578	83
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value	61,371	6,646
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses	556	43
Held-to-maturity securities, continuous unrealized loss position, fair value	61,371	6,646
Held-to-maturity securities, continuous unrealized loss position, unrealized losses	556	43
Other debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value	495	498
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses	5	2
Held-to-maturity securities, continuous unrealized loss position, fair value	495	498
Held-to-maturity securities, continuous unrealized loss position, unrealized losses	$ 5	$ 2