Other Comprehensive Income Details 3 - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Net earnings	$ 161,767	$ 126,562	$ 98,115	$ 129,395	$ 127,160	$ 111,805	$ 386,444	$ 368,360
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	18,332	$ 2,096	$ (24,028)	(13,553)	$ (11,679)	$ 12,660	(3,600)	(12,572)
Comprehensive Income, Net of Tax (Note 9)	$ 180,099			$ 115,842			$ 382,844	$ 355,788