Condensed Consolidated Statement of Changes in Stockholders' Equity (unaudited) - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Accumulated other comprehensive earnings [Member]	Treasury stock [Member]	Total
Balances at at Dec. 31, 2016	$ 1,036	$ 1,489,067	$ 4,642,402	$ (324,739)	$ (18,901)	$ 5,788,865
Net earnings	0	0	158,071	0	0	158,071
Stock option exercises	1	12,932	0	0	0	12,933
Treasury stock sold	0	977	0	0	55	1,032
Currency translation adjustments, net of tax	0	0	0	30,412	0	30,412
Stock based compensation	0	20,598	0	0	0	20,598
Restricted stock activity	2	(5,361)	0	0	0	(5,359)
Dividends declared	0	0	(35,762)	0	0	(35,762)
Balances at at Mar. 31, 2017	$ 1,039	$ 1,518,213	$ 4,764,711	$ (294,327)	$ (18,846)	$ 5,970,790