Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements of Changes in Shareholder's Equity [Abstract]
Stock issued during period, shares, employee stock purchase plans	4,162	3,432	4,713
Stock issued during period, shares, acquisitions	723,851