CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]
Preferred stock - cash dividends declared per share (in dollars per share)	$ 3,100	$ 3,100
Common stock - cash dividends declared per share (in dollars per share)	$ 0.24	$ 0.18