EQUITY (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Changes in equity
Balance at the beginning of the period			$ 1,358,321	$ 1,193,242
Comprehensive income:
Net income including non-controlling interests	64,252	64,736	203,622	195,250
Other comprehensive income (loss)	23,471	21,717	(965)	25,403
Total comprehensive income (loss)	87,723	86,453	202,657	220,653
Cash dividends declared - $0.60 per share and $0.51 per share for the nine months ended September 30, 2013 and 2012, respectively			(49,353)	(42,551)
Cash dividends declared per share (in dollars per share)	$ 0.20	$ 0.17	$ 0.60	$ 0.51
Issuance of shares under benefit plans			30,835	25,002
Purchase of shares for treasury			(113,641)	(60,155)
Balance at the end of the period	1,428,819	1,336,191	1,428,819	1,336,191
Shareholders' Equity
Changes in equity
Balance at the beginning of the period			1,342,373	1,176,946
Comprehensive income:
Net income including non-controlling interests			205,456	195,327
Other comprehensive income (loss)			(1,030)	25,715
Total comprehensive income (loss)			204,426	221,042
Cash dividends declared - $0.60 per share and $0.51 per share for the nine months ended September 30, 2013 and 2012, respectively			(49,353)	(42,551)
Issuance of shares under benefit plans			30,835	25,002
Purchase of shares for treasury			(113,641)	(60,155)
Balance at the end of the period	1,414,640	1,320,284	1,414,640	1,320,284
Noncontrolling Interests
Changes in equity
Balance at the beginning of the period			15,948	16,296
Comprehensive income:
Net income including non-controlling interests			(1,834)	(77)
Other comprehensive income (loss)			65	(312)
Total comprehensive income (loss)			(1,769)	(389)
Cash dividends declared - $0.60 per share and $0.51 per share for the nine months ended September 30, 2013 and 2012, respectively			0	0
Issuance of shares under benefit plans			0	0
Purchase of shares for treasury			0	0
Balance at the end of the period	$ 14,179	$ 15,907	$ 14,179	$ 15,907