Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash dividends paid on common shares, per share	$ 0.2625	$ 0.21	$ 0.21
Issuance under equity compensation plans, shares	179,600	225,958	135,087
Stock Issued During Period, Shares, Conversion of Convertible Securities	0	287,852	1,176,470