CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Stockholders' Equity [Abstract]
Issuance of common shares under stock based compensation awards, including related tax effects	91,340	94,361	[1]
Common stock acquired for treasury	269,667	104,661	[1]
Common stock dividend (in dollars per share)	$ 0.18	$ 0.164	[2]

[1] *Share and per share data gives retrospective recognition to a 10% stock dividend declared on July 22, 2015 and issued on August 14, 2015.

[2] *The computation of three months ended March 31, 2015 per common share data and shares outstanding gives retrospective recognition to a 10% stock dividend declared on July 22, 2015 and issued on August 14, 2015.