CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF EQUITY
Reissuance of shares of common stock from treasury under Directors' Remuneration Plan			790
Issuance of shares of common stock upon exercise of stock options	62,575	51,602	85,500
Purchase of shares of common stock	9,175	5,470	1,331
Non-controlling interest in equity acquired, net of tax		$ 2,280
Other comprehensive income, net of tax expense (benefit)	$ 1,315	$ (1,327)	$ (1,236)