Consolidated Statement Of Shareholders' Equity (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Stockholders' Equity [Abstract]
Net income attributable to redeemable noncontrolling interests	$ 907	$ 983	$ 1,783	$ 1,998
Dividends declared to common shareholders (in dollars per share)	$ 1.02	$ 1.00	$ 2.04	$ 2.00