CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Stockholders' Equity [Abstract]
Issuance of common shares under stock based compensation awards	8,906	9,911	47,271	44,102
Common stock acquired for treasury	141,627	5	295,787	15,789
Common stock dividend (in dollars per share)	$ 0.27	$ 0.24	$ 0.54	$ 0.46