Accumulated Other Comprehensive Income (Details 3) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Net earnings	$ 220,597	$ 212,070	$ 174,001	$ 203,688	$ 184,763	$ 149,663	$ 606,668	$ 538,114
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(42,149)	$ (31,491)	$ 4,350	4,740	$ 9,152	$ 23,181	(69,290)	37,073
Comprehensive Income, Net of Tax (Note 9)	$ 178,448			$ 208,428			$ 537,378	$ 575,187