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Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Securities held-to-maturity, amortized cost	$ 75,203
Securities held-to-maturity, amortized cost	74,217	$ 57,868
Securities held-to-maturity, fair value	69,719	62,029
Securities held-to-maturity, gross Unrecognized gains		3,299
Securities held-to-maturity, gross Unrecognized losses	5,484
Securities held-to-maturity, allowance for credit losses	(986)	(862)	$ (915)	$ (907)
Securities available for sale, amortized cost, total other securities	883,377	786,425
Securities available for sale, fair value	839,869	777,236
Securities available for sale, gross unrealized gains	297	3,031
Securities available for sale, gross unrealized losses	43,805	12,220
Other Securities [Member]
Securities available for sale, amortized cost, total other securities	1,740	1,695
Securities available for sale, fair value	1,740	1,695
Securities available for sale, gross unrealized gains	0	0
Securities available for sale, gross unrealized losses	0	0
US Government Agencies Debt Securities [Member]
Securities available for sale, amortized cost, total other securities	74,543	5,599
Securities available for sale, fair value	73,870	5,590
Securities available for sale, gross unrealized gains	0	0
Securities available for sale, gross unrealized losses	673	9
Corporate Debt Securities [Member]
Securities available for sale, amortized cost, total other securities	109,924	107,423
Securities available for sale, fair value	104,176	104,370
Securities available for sale, gross unrealized gains	86	136
Securities available for sale, gross unrealized losses	5,834	3,189
US States and Political Subdivisions Debt Securities [Member]
Securities held-to-maturity, amortized cost	67,313	50,836
Securities held-to-maturity, fair value	61,839	53,362
Securities held-to-maturity, gross Unrecognized gains		2,526
Securities held-to-maturity, gross Unrecognized losses	5,474
Mutual Fund Debt Securities [Member]
Securities available for sale, amortized cost, total other securities	11,937	12,485
Securities available for sale, fair value	11,937	12,485
Securities available for sale, gross unrealized gains	0	0
Securities available for sale, gross unrealized losses	0	0
Collateralized Debt Obligations [Member]
Securities available for sale, amortized cost, total other securities	95,014	81,166
Securities available for sale, fair value	94,318	80,912
Securities available for sale, gross unrealized gains	0	1
Securities available for sale, gross unrealized losses	696	255
Other Debt Obligations [Member]
Securities held-to-maturity, amortized cost	67,313	50,836
Securities held-to-maturity, amortized cost	66,327	49,974
Securities held-to-maturity, fair value	61,839	53,362
Securities held-to-maturity, gross Unrecognized gains		2,526
Securities held-to-maturity, gross Unrecognized losses	5,474
Securities held-to-maturity, allowance for credit losses	(986)	(862)
Securities available for sale, fair value	286,041	205,052
Collateralized Mortgage Backed Securities [Member]
Securities held-to-maturity, amortized cost	7,890	7,894
Securities held-to-maturity, amortized cost	7,890	7,894
Securities held-to-maturity, fair value	7,880	8,667
Securities held-to-maturity, gross Unrecognized gains		773
Securities held-to-maturity, gross Unrecognized losses	10
Securities available for sale, amortized cost, total other securities	590,219	578,057
Securities available for sale, fair value	553,828	572,184
Securities available for sale, gross unrealized gains	211	2,894
Securities available for sale, gross unrealized losses	36,602	8,767
REMIC and CMO [Member]
Securities available for sale, amortized cost, total other securities	197,494	210,948
Securities available for sale, fair value	185,390	208,509
Securities available for sale, gross unrealized gains	19	1,217
Securities available for sale, gross unrealized losses	12,123	3,656
GNMA [Member]
Securities available for sale, amortized cost, total other securities	10,039	10,572
Securities available for sale, fair value	9,116	10,286
Securities available for sale, gross unrealized gains	18	30
Securities available for sale, gross unrealized losses	941	316
FNMA [Member]
Securities held-to-maturity, amortized cost	7,890	7,894
Securities held-to-maturity, fair value	7,880	8,667
Securities held-to-maturity, gross Unrecognized gains		773
Securities held-to-maturity, gross Unrecognized losses	10
Securities available for sale, amortized cost, total other securities	226,185	203,777
Securities available for sale, fair value	213,798	202,938
Securities available for sale, gross unrealized gains	67	1,321
Securities available for sale, gross unrealized losses	12,454	2,160
FHLMC [Member]
Securities available for sale, amortized cost, total other securities	156,501	152,760
Securities available for sale, fair value	145,524	150,451
Securities available for sale, gross unrealized gains	107	326
Securities available for sale, gross unrealized losses	11,084	2,635
Available for Sale Securities Excluding Mortgage Backed Securities [Member]
Securities available for sale, amortized cost, total other securities	293,158	208,368
Securities available for sale, fair value	286,041	205,052
Securities available for sale, gross unrealized gains	86	137
Securities available for sale, gross unrealized losses	$ 7,203	$ 3,453

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