Consolidated Statements Of Cash Flows Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]
Interest	$ 67,974	$ 109,451	$ 86,173
Income taxes	133,283	148,991	137,650
Fair value of net assets acquired in acquisition	1,564,970	7,267	1,714,462
Noncontrolling interest of assets acquired	(24,160)	0	(14,577)
Liabilities assumed in acquisition	(17,147)	(7,286)	(942,513)
Shares issued for acquisitions	(153,096)	0	(313,906)
Noncash investing and financing activities, total	$ 1,370,567	$ (19)	$ 443,466