Financial Derivatives (Interest Rate Swaps) (Details) - Interest rate swaps - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Long
Derivative [Line Items]
Notional Amount		$ 474,741	$ 253,423
Fair Value		(409)	8,329
Long | 2021 [Member]
Derivative [Line Items]
Notional Amount			12,950
Fair Value			205
Long | 2022 [Member]
Derivative [Line Items]
Notional Amount		53,974	103,974
Fair Value		475	1,413
Long | 2023 [Member]
Derivative [Line Items]
Notional Amount		241,407	48,657
Fair Value		(265)	2,209
Long | 2024 [Member]
Derivative [Line Items]
Notional Amount		37,142	86,342
Fair Value		556	4,567
Long | 2026 [Member]
Derivative [Line Items]
Notional Amount		105,040
Fair Value		(907)
Long | 2031
Derivative [Line Items]
Notional Amount		35,678
Fair Value		(114)
Long | 2035
Derivative [Line Items]
Notional Amount		500	500
Fair Value		(41)	(14)
Long | 2040
Derivative [Line Items]
Notional Amount		500	500
Fair Value		(50)	(20)
Long | 2050
Derivative [Line Items]
Notional Amount		500	500
Fair Value		$ (63)	$ (31)
Long | Weighted Average
Derivative [Line Items]
Pay Rate		1.06%	1.48%
Receive Rate		0.15%	0.22%
Remaining Years to Maturity	2 years 5 months 23 days	2 years 11 months 8 days
Long | Weighted Average | 2021 [Member]
Derivative [Line Items]
Pay Rate			1.75%
Receive Rate			0.24%
Remaining Years to Maturity	8 months 15 days
Long | Weighted Average | 2022 [Member]
Derivative [Line Items]
Pay Rate		1.85%	1.07%
Receive Rate		0.17%	0.22%
Remaining Years to Maturity	1 year 5 months 23 days	1 month 28 days
Long | Weighted Average | 2023 [Member]
Derivative [Line Items]
Pay Rate		0.73%	2.00%
Receive Rate		0.15%	0.24%
Remaining Years to Maturity	2 years 3 months 3 days	1 year 8 months 8 days
Long | Weighted Average | 2024 [Member]
Derivative [Line Items]
Pay Rate		1.59%	1.65%
Receive Rate		0.13%	0.22%
Remaining Years to Maturity	3 years 8 months 23 days	2 years 9 months 10 days
Long | Weighted Average | 2026 [Member]
Derivative [Line Items]
Pay Rate		1.10%
Receive Rate		0.18%
Remaining Years to Maturity		4 years 8 months 19 days
Long | Weighted Average | 2031
Derivative [Line Items]
Pay Rate		1.48%
Receive Rate		0.15%
Remaining Years to Maturity		9 years 9 months 3 days
Long | Weighted Average | 2035
Derivative [Line Items]
Pay Rate		0.74%	0.74%
Receive Rate		0.05%	0.09%
Remaining Years to Maturity	14 years 9 months 21 days	13 years 9 months 21 days
Long | Weighted Average | 2040
Derivative [Line Items]
Pay Rate		0.84%	0.84%
Receive Rate		0.08%	0.09%
Remaining Years to Maturity	19 years 9 months 25 days	18 years 9 months 25 days
Long | Weighted Average | 2050
Derivative [Line Items]
Pay Rate		0.90%	0.90%
Receive Rate		0.08%	0.09%
Remaining Years to Maturity	29 years 9 months 25 days	28 years 9 months 25 days
Short
Derivative [Line Items]
Notional Amount		$ 1,519,488	$ 408,295
Fair Value		5,304	(14,984)
Short | 2021 [Member]
Derivative [Line Items]
Notional Amount			17,500
Fair Value			(231)
Short | 2022 [Member]
Derivative [Line Items]
Notional Amount		64,100	96,533
Fair Value		(282)	(1,535)
Short | 2023 [Member]
Derivative [Line Items]
Notional Amount		771,110	146,012
Fair Value		1,488	(4,770)
Short | 2024 [Member]
Derivative [Line Items]
Notional Amount		314,762
Fair Value		3,685
Short | 2025 [Member]
Derivative [Line Items]
Notional Amount		14,993	66,503
Fair Value		426	(1,034)
Short | 2026 [Member]
Derivative [Line Items]
Notional Amount		30,625	11,216
Fair Value		481	(458)
Short | 2027 [Member]
Derivative [Line Items]
Notional Amount		14,732	9,732
Fair Value		448	60
Short | 2028 [Member]
Derivative [Line Items]
Notional Amount		149,524	16,644
Fair Value		470	(2,169)
Short | 2029 [Member]
Derivative [Line Items]
Notional Amount		19,152	22,744
Fair Value		(801)	(2,289)
Short | 2030 [Member]
Derivative [Line Items]
Notional Amount		9,585	13,015
Fair Value		291	(369)
Short | 2031
Derivative [Line Items]
Notional Amount		122,509
Fair Value		535
Short | 2035
Derivative [Line Items]
Notional Amount		500	500
Fair Value		38	15
Short | 2036 [Member]
Derivative [Line Items]
Notional Amount		1,100	1,100
Fair Value		25	(47)
Short | 2040
Derivative [Line Items]
Notional Amount		500	500
Fair Value		45	20
Short | 2049 [Member]
Derivative [Line Items]
Notional Amount		5,796	5,796
Fair Value		(1,599)	(2,208)
Short | 2050
Derivative [Line Items]
Notional Amount		500	500
Fair Value		$ 54	$ 31
Short | Weighted Average
Derivative [Line Items]
Pay Rate		0.75%	1.39%
Receive Rate		0.18%	0.23%
Remaining Years to Maturity	3 years 9 months 25 days	3 years 1 month 9 days
Short | Weighted Average | 2021 [Member]
Derivative [Line Items]
Pay Rate			2.75%
Receive Rate			0.24%
Remaining Years to Maturity	2 months 19 days
Short | Weighted Average | 2022 [Member]
Derivative [Line Items]
Pay Rate		0.99%	1.19%
Receive Rate		0.18%	0.22%
Remaining Years to Maturity	1 year 1 month 20 days	2 months 4 days
Short | Weighted Average | 2023 [Member]
Derivative [Line Items]
Pay Rate		0.58%	1.50%
Receive Rate		0.19%	0.23%
Remaining Years to Maturity	2 years 5 months 1 day	1 year 6 months 7 days
Short | Weighted Average | 2024 [Member]
Derivative [Line Items]
Pay Rate		0.43%
Receive Rate		0.16%
Remaining Years to Maturity		2 years 2 months 23 days
Short | Weighted Average | 2025 [Member]
Derivative [Line Items]
Pay Rate		0.49%	0.73%
Receive Rate		0.16%	0.21%
Remaining Years to Maturity	4 years 9 months	3 years 9 months 21 days
Short | Weighted Average | 2026 [Member]
Derivative [Line Items]
Pay Rate		0.89%	1.23%
Receive Rate		0.15%	0.25%
Remaining Years to Maturity	5 years 6 months	4 years 5 months 23 days
Short | Weighted Average | 2027 [Member]
Derivative [Line Items]
Pay Rate		0.80%	0.49%
Receive Rate		0.19%	0.24%
Remaining Years to Maturity	6 years 5 months 23 days	5 years 7 months 6 days
Short | Weighted Average | 2028 [Member]
Derivative [Line Items]
Pay Rate		1.33%	2.39%
Receive Rate		0.17%	0.24%
Remaining Years to Maturity	7 years 3 months 25 days	6 years 6 months 18 days
Short | Weighted Average | 2029 [Member]
Derivative [Line Items]
Pay Rate		1.98%	1.94%
Receive Rate		0.16%	0.23%
Remaining Years to Maturity	8 years 7 months 9 days	7 years 6 months 18 days
Short | Weighted Average | 2030 [Member]
Derivative [Line Items]
Pay Rate		1.09%	1.13%
Receive Rate		0.18%	0.22%
Remaining Years to Maturity	9 years 3 months 14 days	8 years 2 months 23 days
Short | Weighted Average | 2031
Derivative [Line Items]
Pay Rate		1.45%
Receive Rate		0.17%
Remaining Years to Maturity		9 years 5 months 19 days
Short | Weighted Average | 2035
Derivative [Line Items]
Pay Rate		0.78%	0.78%
Receive Rate		0.08%	0.09%
Remaining Years to Maturity	14 years 9 months 21 days	13 years 9 months 21 days
Short | Weighted Average | 2036 [Member]
Derivative [Line Items]
Pay Rate		1.45%	1.45%
Receive Rate		0.16%	0.25%
Remaining Years to Maturity	15 years 1 month 17 days	14 years 1 month 17 days
Short | Weighted Average | 2040
Derivative [Line Items]
Pay Rate		0.90%	0.90%
Receive Rate		0.08%	0.09%
Remaining Years to Maturity	19 years 9 months 25 days	18 years 9 months 25 days
Short | Weighted Average | 2049 [Member]
Derivative [Line Items]
Pay Rate		2.89%	2.89%
Receive Rate		0.13%	0.23%
Remaining Years to Maturity	28 years 7 days	27 years 7 days
Short | Weighted Average | 2050
Derivative [Line Items]
Pay Rate		0.98%	0.98%
Receive Rate		0.08%	0.09%
Remaining Years to Maturity	29 years 9 months 25 days	28 years 9 months 25 days