Consolidated Statements of Equity (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Shares issued for acquisitions	556
Shares as a result of stock split	187
Treasury Shares
Purchase of treasury shares	17	0	0
Additional Paid-in Capital
Income tax on stock option exercise and other shares issued to employees and directors	1,485	1,243	710
Stock option exercises and other shares issued to employees and directors, shares	219	224	215
Retained Earnings
Dividends declared, per common share	0.47	0.43	0.4