Other Comprehensive Income Details 3 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Net earnings	$ 88,861	$ 84,996	$ 229,469	$ 217,069	$ 338,241
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(40,613)	(40,456)	(25,089)	(40,993)	$ (177,913)
Comprehensive Income, Net of Tax (Note 9)	$ 48,248	$ 44,540	$ 204,380	$ 176,076