Impact of Recent Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effect of adopting accounting standards updates	$ 1,642,471	$ 1,640,080	$ 1,597,703	$ 1,585,265	$ 1,621,131	$ 1,697,096
Allowance for credit losses	(102,073)	(92,758)	(88,023)	(79,016)	(76,275)	(80,740)
RETAINED EARNINGS
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effect of adopting accounting standards updates	$ 954,403	$ 940,533	918,158	$ 860,977	$ 839,807	$ 814,533
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effect of adopting accounting standards updates			433
Allowance for credit losses			594
Cumulative Effect, Period of Adoption, Adjustment | RETAINED EARNINGS
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effect of adopting accounting standards updates			$ 433