Other Comprehensive Income Details 3 (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Net earnings	$ 77,557	$ 74,022	$ 140,608	$ 132,073	$ 338,241
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	21,780	(2,391)	15,524	(537)	$ (177,913)
Comprehensive Income, Net of Tax (Note 8)	$ 99,337	$ 71,631	$ 156,132	$ 131,536