CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Investments, Current, Fair Value Disclosure	$ 8,517	$ 0
Investments at fair value	$ 86,578	$ 109,751
Common stock, par value (in usd per share)	$ 4.30
Common Stock
Common stock, par value (in usd per share)	$ 0.1000	$ 0.1000
Common Stock, Shares Authorized	2,010,000,000,000	2,010,000,000,000
Common Stock, Shares, Issued	755,806,627,000	748,541,862,000
Common Stock, Shares, Outstanding	567,204,385,000	559,939,620,000
Treasury Stock
Treasury Stock, Shares	(188,602,242)	(188,602,242)