Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Equity [Abstract]
Shares scheduled for cancellation	1,250,000
Treasury stock, shares, acquired	24,795		34,959
Treasury stock, value, acquired	$ 2.8		$ 3.9
Treasury shares, acquired, tax burden	8,795		18,959
Treasury shares, acquired, value, tax burden	$ 1.0		$ 2.2
Stock Issued During Period, Shares, Treasury Stock Reissued	29,028		62,920
Cash dividends per share (in dollars per share)	$ 0.55	$ 0.55	$ 1.65	$ 1.65
Dividends declared (in dollars per share)	$ 0.55