Consolidated Statements of Stockholders' Equity (unaudited) (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Consolidated Statements of Stockholders' Equity (unaudited) [Abstract]
Cash dividends - per share (in dollars per share)	$ 0.42	$ 0.40
Purchase of treasury shares (in shares)	3,288	267,425
Net issuance of shares for acquisition (in shares)		10,346,363
Treasury stock reissued in acquisition (in shares)		408,957
Net issuance of shares to employee benefit plans and other stock plans, including tax benefit (in shares)	189,036	89,338