Consolidated Statements of Cash Flows Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Interest	$ 57,269	$ 67,974	$ 109,451
Income taxes	276,789	133,283	148,991
Fair value of net assets acquired in acquisition	0	1,564,970	7,267
Noncontrolling interest of assets acquired	0	(24,160)	0
Liabilities assumed in acquisition	0	(17,147)	(7,286)
Shares issued for acquisitions	0	(153,096)	0
Noncash investing and financing activities, total	$ 0	$ 1,370,567	$ (19)