Financial Derivatives (Interest Rate Swaps) (Details) - Interest rate swaps - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Long
Derivative [Line Items]
Notional Amount	$ 1,393,129	$ 1,775,733
Fair Value	(18,150)	(48,628)
Long | Forward-starting interest rate swap
Derivative [Line Items]
Notional Amount	5,000
Fair Value	200
Long | Conversion related
Derivative [Line Items]
Notional Amount	126,400
Fair Value	1,600
Long | 2023 [Member]
Derivative [Line Items]
Notional Amount	126,414	41,407
Fair Value	(1,569)	(84)
Long | 2024 [Member]
Derivative [Line Items]
Notional Amount	427,234	818,037
Fair Value	(1,246)	(25,569)
Long | 2025 [Member]
Derivative [Line Items]
Notional Amount	135,148	328,775
Fair Value	(388)	(5,468)
Long | 2026 [Member]
Derivative [Line Items]
Notional Amount	458,786	215,852
Fair Value	(14,042)	(11,312)
Long | 2027 [Member]
Derivative [Line Items]
Notional Amount	11,591	311,007
Fair Value	(199)	(1,067)
Long | 2028 [Member]
Derivative [Line Items]
Notional Amount	196,740
Fair Value	632
Long | 2032
Derivative [Line Items]
Notional Amount	2,700	59,155
Fair Value	(209)	(4,596)
Long | 2033
Derivative [Line Items]
Notional Amount	33,016
Fair Value	(605)
Long | 2035
Derivative [Line Items]
Notional Amount	500	500
Fair Value	(141)	(145)
Long | 2040
Derivative [Line Items]
Notional Amount	500	500
Fair Value	(172)	(175)
Long | 2050
Derivative [Line Items]
Notional Amount	500	500
Fair Value	$ (211)	$ (212)
Long | Weighted Average
Derivative [Line Items]
Pay Rate	4.28%	2.79%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	2 years 3 months 7 days	2 years 9 months 3 days
Long | Weighted Average | Including forward-starting and conversion-related interest rate swaps
Derivative [Line Items]
Pay Rate	3.89%
Receive Rate	5.08%
Long | Weighted Average | 2023 [Member]
Derivative [Line Items]
Pay Rate		2.00%
Receive Rate		4.74%
Remaining Years to Maturity	1 month 20 days	2 months 19 days
Long | Weighted Average | 2024 [Member]
Derivative [Line Items]
Pay Rate	5.17%	2.39%
Receive Rate	5.09%	4.27%
Remaining Years to Maturity	9 months	1 year 4 months 24 days
Long | Weighted Average | 2025 [Member]
Derivative [Line Items]
Pay Rate	4.86%	3.48%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	1 year 8 months 8 days	2 years 10 months 2 days
Long | Weighted Average | 2026 [Member]
Derivative [Line Items]
Pay Rate	3.45%	2.26%
Receive Rate	5.09%	4.32%
Remaining Years to Maturity	2 years 8 months 23 days	3 years 3 months
Long | Weighted Average | 2027 [Member]
Derivative [Line Items]
Pay Rate	3.74%	3.67%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	4 years 4 months 17 days	4 years 10 months 20 days
Long | Weighted Average | 2028 [Member]
Derivative [Line Items]
Pay Rate	4.11%
Receive Rate	5.09%
Remaining Years to Maturity	4 years 8 months 8 days
Long | Weighted Average | 2032
Derivative [Line Items]
Pay Rate	2.62%	2.58%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	8 years 10 months 2 days	9 years 6 months 29 days
Long | Weighted Average | 2033
Derivative [Line Items]
Pay Rate	3.41%
Receive Rate	5.09%
Remaining Years to Maturity	9 years 7 months 28 days
Long | Weighted Average | 2035
Derivative [Line Items]
Pay Rate	0.74%	0.74%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	12 years 3 months 25 days	12 years 9 months 21 days
Long | Weighted Average | 2040
Derivative [Line Items]
Pay Rate	0.84%	0.84%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	17 years 3 months 25 days	17 years 9 months 25 days
Long | Weighted Average | 2050
Derivative [Line Items]
Pay Rate	0.90%	0.90%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	27 years 3 months 29 days	27 years 9 months 25 days
Short
Derivative [Line Items]
Notional Amount	$ 2,962,131	$ 2,822,170
Fair Value	116,813	115,360
Short | Forward-starting interest rate swap
Derivative [Line Items]
Notional Amount	505,000
Fair Value	(500)
Short | Conversion related
Derivative [Line Items]
Notional Amount	126,400
Fair Value	1,600
Short | 2023 [Member]
Derivative [Line Items]
Notional Amount	317,004	664,398
Fair Value	3,936	13,576
Short | 2024 [Member]
Derivative [Line Items]
Notional Amount	629,547	817,850
Fair Value	14,234	17,326
Short | 2025 [Member]
Derivative [Line Items]
Notional Amount	215,732	382,793
Fair Value	8,606	11,747
Short | 2026 [Member]
Derivative [Line Items]
Notional Amount	87,091	100
Fair Value	2,027	12
Short | 2027 [Member]
Derivative [Line Items]
Notional Amount	209,841	264,500
Fair Value	10,788	8,218
Short | 2028 [Member]
Derivative [Line Items]
Notional Amount	728,914	114,119
Fair Value	13,718	14,230
Short | 2029 [Member]
Derivative [Line Items]
Notional Amount	53,011	54,428
Fair Value	4,713	4,485
Short | 2030 [Member]
Derivative [Line Items]
Notional Amount	67,317	68,300
Fair Value	4,732	5,763
Short | 2031
Derivative [Line Items]
Notional Amount	157,766	161,009
Fair Value	23,784	23,799
Short | 2032
Derivative [Line Items]
Notional Amount	183,517	236,277
Fair Value	12,275	10,161
Short | 2033
Derivative [Line Items]
Notional Amount	254,060
Fair Value	11,470
Short | 2035
Derivative [Line Items]
Notional Amount	500	500
Fair Value	137	142
Short | 2036 [Member]
Derivative [Line Items]
Notional Amount	1,102	1,100
Fair Value	265	267
Short | 2037
Derivative [Line Items]
Notional Amount	45,000	45,000
Fair Value	3,998	3,578
Short | 2040
Derivative [Line Items]
Notional Amount	500	500
Fair Value	167	171
Short | 2049 [Member]
Derivative [Line Items]
Notional Amount	5,729	5,796
Fair Value	668	630
Short | 2050
Derivative [Line Items]
Notional Amount	500	500
Fair Value	202	203
Short | 2052
Derivative [Line Items]
Notional Amount	5,000	5,000
Fair Value	$ 1,093	$ 1,052
Short | Weighted Average
Derivative [Line Items]
Pay Rate	2.65%	2.27%
Receive Rate	5.12%	4.39%
Remaining Years to Maturity	4 years 4 months 13 days	3 years 5 months 19 days
Short | Weighted Average | Including forward-starting and conversion-related interest rate swaps
Derivative [Line Items]
Pay Rate	4.26%
Receive Rate	2.76%
Short | Weighted Average | 2023 [Member]
Derivative [Line Items]
Pay Rate	0.32%	0.64%
Receive Rate	5.49%	4.51%
Remaining Years to Maturity	2 months 1 day	4 months 17 days
Short | Weighted Average | 2024 [Member]
Derivative [Line Items]
Pay Rate	3.18%	3.03%
Receive Rate	5.09%	4.35%
Remaining Years to Maturity	1 year 1 month 9 days	1 year 6 months 18 days
Short | Weighted Average | 2025 [Member]
Derivative [Line Items]
Pay Rate	2.97%	2.89%
Receive Rate	5.09%	4.32%
Remaining Years to Maturity	1 year 10 months 13 days	2 years 6 months 3 days
Short | Weighted Average | 2026 [Member]
Derivative [Line Items]
Pay Rate	3.66%	0.79%
Receive Rate	5.09%	4.41%
Remaining Years to Maturity	2 years 9 months	3 years 6 months 29 days
Short | Weighted Average | 2027 [Member]
Derivative [Line Items]
Pay Rate	2.78%	3.01%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	3 years 11 months 15 days	4 years 6 months 10 days
Short | Weighted Average | 2028 [Member]
Derivative [Line Items]
Pay Rate	2.63%	1.44%
Receive Rate	5.09%	4.37%
Remaining Years to Maturity	4 years 11 months 12 days	5 years 5 months 26 days
Short | Weighted Average | 2029 [Member]
Derivative [Line Items]
Pay Rate	2.19%	2.45%
Receive Rate	5.09%	4.65%
Remaining Years to Maturity	5 years 9 months 25 days	6 years 3 months 21 days
Short | Weighted Average | 2030 [Member]
Derivative [Line Items]
Pay Rate	2.59%	2.30%
Receive Rate	5.09%	4.36%
Remaining Years to Maturity	6 years 10 months 24 days	7 years 4 months 20 days
Short | Weighted Average | 2031
Derivative [Line Items]
Pay Rate	1.51%	1.71%
Receive Rate	5.09%	4.48%
Remaining Years to Maturity	7 years 11 months 15 days	8 years 5 months 15 days
Short | Weighted Average | 2032
Derivative [Line Items]
Pay Rate	2.81%	2.98%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	9 years 25 days	9 years 7 months 17 days
Short | Weighted Average | 2033
Derivative [Line Items]
Pay Rate	3.09%
Receive Rate	5.09%
Remaining Years to Maturity	9 years 8 months 4 days
Short | Weighted Average | 2035
Derivative [Line Items]
Pay Rate	0.78%	0.78%
Receive Rate	5.08%	4.33%
Remaining Years to Maturity	12 years 3 months 25 days	12 years 9 months 21 days
Short | Weighted Average | 2036 [Member]
Derivative [Line Items]
Pay Rate	1.19%	1.45%
Receive Rate	5.09%	4.67%
Remaining Years to Maturity	12 years 7 months 20 days	13 years 1 month 17 days
Short | Weighted Average | 2037
Derivative [Line Items]
Pay Rate	2.81%	2.81%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	14 years 1 month 28 days	14 years 7 months 28 days
Short | Weighted Average | 2040
Derivative [Line Items]
Pay Rate	0.90%	0.90%
Receive Rate	5.08%	4.33%
Remaining Years to Maturity	17 years 3 months 25 days	17 years 9 months 25 days
Short | Weighted Average | 2049 [Member]
Derivative [Line Items]
Pay Rate	2.63%	2.89%
Receive Rate	5.09%	3.74%
Remaining Years to Maturity	25 years 6 months 10 days	26 years 7 days
Short | Weighted Average | 2050
Derivative [Line Items]
Pay Rate	0.98%	0.98%
Receive Rate	5.08%	4.33%
Remaining Years to Maturity	27 years 3 months 29 days	27 years 9 months 25 days
Short | Weighted Average | 2052
Derivative [Line Items]
Pay Rate	2.07%	2.07%
Receive Rate	5.09%	4.30%
Remaining Years to Maturity	28 years 9 months 7 days	29 years 3 months 7 days