Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Equity [Abstract]
Treasury shares, acquired, tax burden	10,752
Treasury shares, acquired, value, tax burden	$ 1.3
Stock Issued During Period, Shares, Treasury Stock Reissued	35,222
Cash dividends per share (in dollars per share)	$ 0.55	$ 0.55
Dividends declared (in dollars per share)	$ 0.55