Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Consolidated Statements of Changes in Shareholders' Equity (Unaudited) [Abstract]
Cash dividend declared (in dollars per share)	$ 0.1312	$ 0.1312
Stock options exercised and related tax (in shares)	97,600	19,429
Purchase of treasury stock (in shares)	80,769	14,881
Sale of treasury stock (in shares)	213,748	194,139