Financial Derivatives (Interest Rate Swaps) (Details) - Interest rate swaps - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Long
Derivative [Line Items]
Notional Amount	$ 1,325,765	$ 1,775,733
Fair Value	(27,756)	(48,628)
Long | 2023 [Member]
Derivative [Line Items]
Notional Amount		41,407
Fair Value		(84)
Long | 2024 [Member]
Derivative [Line Items]
Notional Amount	427,234	818,037
Fair Value	(1,056)	(25,569)
Long | 2025 [Member]
Derivative [Line Items]
Notional Amount	138,918	328,775
Fair Value	(943)	(5,468)
Long | 2026 [Member]
Derivative [Line Items]
Notional Amount	410,298	215,852
Fair Value	(17,440)	(11,312)
Long | 2027 [Member]
Derivative [Line Items]
Notional Amount	11,591	311,007
Fair Value	(425)	(1,067)
Long | 2028 [Member]
Derivative [Line Items]
Notional Amount	257,796
Fair Value	(4,036)
Long | 2030 [Member]
Derivative [Line Items]
Notional Amount	27,000
Fair Value	(901)
Long | 2032
Derivative [Line Items]
Notional Amount		59,155
Fair Value		(4,596)
Long | 2033
Derivative [Line Items]
Notional Amount	51,428
Fair Value	(2,302)
Long | 2035
Derivative [Line Items]
Notional Amount	500	500
Fair Value	(174)	(145)
Long | 2040
Derivative [Line Items]
Notional Amount	500	500
Fair Value	(215)	(175)
Long | 2050
Derivative [Line Items]
Notional Amount	500	500
Fair Value	$ (264)	$ (212)
Long | Weighted Average
Derivative [Line Items]
Pay Rate	4.28%	2.79%
Receive Rate	5.32%	4.30%
Remaining Years to Maturity	2 years 6 months 14 days	2 years 9 months 3 days
Long | Weighted Average | 2023 [Member]
Derivative [Line Items]
Pay Rate		2.00%
Receive Rate		4.74%
Remaining Years to Maturity		2 months 19 days
Long | Weighted Average | 2024 [Member]
Derivative [Line Items]
Pay Rate	5.17%	2.39%
Receive Rate	5.33%	4.27%
Remaining Years to Maturity	6 months	1 year 4 months 24 days
Long | Weighted Average | 2025 [Member]
Derivative [Line Items]
Pay Rate	4.88%	3.48%
Receive Rate	5.31%	4.30%
Remaining Years to Maturity	1 year 5 months 15 days	2 years 10 months 2 days
Long | Weighted Average | 2026 [Member]
Derivative [Line Items]
Pay Rate	3.37%	2.26%
Receive Rate	5.32%	4.32%
Remaining Years to Maturity	2 years 5 months 15 days	3 years 3 months
Long | Weighted Average | 2027 [Member]
Derivative [Line Items]
Pay Rate	3.74%	3.67%
Receive Rate	5.31%	4.30%
Remaining Years to Maturity	4 years 1 month 17 days	4 years 10 months 20 days
Long | Weighted Average | 2028 [Member]
Derivative [Line Items]
Pay Rate	4.14%
Receive Rate	5.31%
Remaining Years to Maturity	4 years 6 months 25 days
Long | Weighted Average | 2030 [Member]
Derivative [Line Items]
Pay Rate	3.78%
Receive Rate	5.31%
Remaining Years to Maturity	6 years 10 months 2 days
Long | Weighted Average | 2032
Derivative [Line Items]
Pay Rate		2.58%
Receive Rate		4.30%
Remaining Years to Maturity		9 years 6 months 29 days
Long | Weighted Average | 2033
Derivative [Line Items]
Pay Rate	3.76%
Receive Rate	5.32%
Remaining Years to Maturity	9 years 8 months 4 days
Long | Weighted Average | 2035
Derivative [Line Items]
Pay Rate	0.74%	0.74%
Receive Rate	5.31%	4.30%
Remaining Years to Maturity	12 years 21 days	12 years 9 months 21 days
Long | Weighted Average | 2040
Derivative [Line Items]
Pay Rate	0.84%	0.84%
Receive Rate	5.31%	4.30%
Remaining Years to Maturity	17 years 25 days	17 years 9 months 25 days
Long | Weighted Average | 2050
Derivative [Line Items]
Pay Rate	0.90%	0.90%
Receive Rate	5.31%	4.30%
Remaining Years to Maturity	27 years 25 days	27 years 9 months 25 days
Short
Derivative [Line Items]
Notional Amount	$ 2,918,171	$ 2,822,170
Fair Value	176,581	115,360
Short | 2023 [Member]
Derivative [Line Items]
Notional Amount		664,398
Fair Value		13,576
Short | 2024 [Member]
Derivative [Line Items]
Notional Amount	629,547	817,850
Fair Value	13,213	17,326
Short | 2025 [Member]
Derivative [Line Items]
Notional Amount	222,190	382,793
Fair Value	8,655	11,747
Short | 2026 [Member]
Derivative [Line Items]
Notional Amount	84,637	100
Fair Value	2,170	12
Short | 2027 [Member]
Derivative [Line Items]
Notional Amount	209,841	264,500
Fair Value	13,960	8,218
Short | 2028 [Member]
Derivative [Line Items]
Notional Amount	795,474	114,119
Fair Value	31,199	14,230
Short | 2029 [Member]
Derivative [Line Items]
Notional Amount	53,011	54,428
Fair Value	6,068	4,485
Short | 2030 [Member]
Derivative [Line Items]
Notional Amount	123,317	68,300
Fair Value	7,742	5,763
Short | 2031
Derivative [Line Items]
Notional Amount	157,766	161,009
Fair Value	30,813	23,799
Short | 2032
Derivative [Line Items]
Notional Amount	181,867	236,277
Fair Value	21,002	10,161
Short | 2033
Derivative [Line Items]
Notional Amount	369,690
Fair Value	29,585
Short | 2035
Derivative [Line Items]
Notional Amount	500	500
Fair Value	170	142
Short | 2036 [Member]
Derivative [Line Items]
Notional Amount	1,102	1,100
Fair Value	342	267
Short | 2037
Derivative [Line Items]
Notional Amount	45,000	45,000
Fair Value	7,113	3,578
Short | 2040
Derivative [Line Items]
Notional Amount	500	500
Fair Value	208	171
Short | 2049 [Member]
Derivative [Line Items]
Notional Amount	5,729	5,796
Fair Value	1,382	630
Short | 2050
Derivative [Line Items]
Notional Amount	500	500
Fair Value	254	203
Short | 2052
Derivative [Line Items]
Notional Amount	5,000	5,000
Fair Value	1,725	$ 1,052
Short | Year 2038
Derivative [Line Items]
Notional Amount	32,500
Fair Value	$ 980
Short | Weighted Average
Derivative [Line Items]
Pay Rate	3.17%	2.27%
Receive Rate	5.28%	4.39%
Remaining Years to Maturity	5 years 3 days	3 years 5 months 19 days
Short | Weighted Average | 2023 [Member]
Derivative [Line Items]
Pay Rate		0.64%
Receive Rate		4.51%
Remaining Years to Maturity		4 months 17 days
Short | Weighted Average | 2024 [Member]
Derivative [Line Items]
Pay Rate	3.18%	3.03%
Receive Rate	5.34%	4.35%
Remaining Years to Maturity	10 months 9 days	1 year 6 months 18 days
Short | Weighted Average | 2025 [Member]
Derivative [Line Items]
Pay Rate	3.19%	2.89%
Receive Rate	5.31%	4.32%
Remaining Years to Maturity	1 year 8 months 26 days	2 years 6 months 3 days
Short | Weighted Average | 2026 [Member]
Derivative [Line Items]
Pay Rate	3.91%	0.79%
Receive Rate	5.31%	4.41%
Remaining Years to Maturity	2 years 7 months 13 days	3 years 6 months 29 days
Short | Weighted Average | 2027 [Member]
Derivative [Line Items]
Pay Rate	2.78%	3.01%
Receive Rate	5.31%	4.30%
Remaining Years to Maturity	3 years 8 months 12 days	4 years 6 months 10 days
Short | Weighted Average | 2028 [Member]
Derivative [Line Items]
Pay Rate	3.58%	1.44%
Receive Rate	5.30%	4.37%
Remaining Years to Maturity	4 years 8 months 19 days	5 years 5 months 26 days
Short | Weighted Average | 2029 [Member]
Derivative [Line Items]
Pay Rate	2.19%	2.45%
Receive Rate	5.31%	4.65%
Remaining Years to Maturity	5 years 6 months 25 days	6 years 3 months 21 days
Short | Weighted Average | 2030 [Member]
Derivative [Line Items]
Pay Rate	3.31%	2.30%
Receive Rate	5.32%	4.36%
Remaining Years to Maturity	6 years 9 months 10 days	7 years 4 months 20 days
Short | Weighted Average | 2031
Derivative [Line Items]
Pay Rate	1.51%	1.71%
Receive Rate	5.31%	4.48%
Remaining Years to Maturity	7 years 8 months 15 days	8 years 5 months 15 days
Short | Weighted Average | 2032
Derivative [Line Items]
Pay Rate	2.80%	2.98%
Receive Rate	5.31%	4.30%
Remaining Years to Maturity	8 years 9 months 21 days	9 years 7 months 17 days
Short | Weighted Average | 2033
Derivative [Line Items]
Pay Rate	3.33%
Receive Rate	5.10%
Remaining Years to Maturity	9 years 6 months 21 days
Short | Weighted Average | 2035
Derivative [Line Items]
Pay Rate	0.78%	0.78%
Receive Rate	5.33%	4.33%
Remaining Years to Maturity	12 years 21 days	12 years 9 months 21 days
Short | Weighted Average | 2036 [Member]
Derivative [Line Items]
Pay Rate	1.19%	1.45%
Receive Rate	5.31%	4.67%
Remaining Years to Maturity	12 years 4 months 20 days	13 years 1 month 17 days
Short | Weighted Average | 2037
Derivative [Line Items]
Pay Rate	2.81%	2.81%
Receive Rate	5.31%	4.30%
Remaining Years to Maturity	13 years 10 months 28 days	14 years 7 months 28 days
Short | Weighted Average | 2040
Derivative [Line Items]
Pay Rate	0.90%	0.90%
Receive Rate	5.33%	4.33%
Remaining Years to Maturity	17 years 25 days	17 years 9 months 25 days
Short | Weighted Average | 2049 [Member]
Derivative [Line Items]
Pay Rate	2.63%	2.89%
Receive Rate	5.31%	3.74%
Remaining Years to Maturity	25 years 3 months 10 days	26 years 7 days
Short | Weighted Average | 2050
Derivative [Line Items]
Pay Rate	0.98%	0.98%
Receive Rate	5.33%	4.33%
Remaining Years to Maturity	27 years 25 days	27 years 9 months 25 days
Short | Weighted Average | 2052
Derivative [Line Items]
Pay Rate	2.07%	2.07%
Receive Rate	5.31%	4.30%
Remaining Years to Maturity	28 years 6 months 7 days	29 years 3 months 7 days
Short | Weighted Average | Year 2038
Derivative [Line Items]
Pay Rate	4.01%
Receive Rate	4.50%
Remaining Years to Maturity	14 years 11 months 1 day