EQUITY (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Changes in equity
Balance at the beginning of the period			$ 1,530,688	$ 1,358,321
Comprehensive income:
Net income including non-controlling interests	77,289	72,527	133,713	139,370
Other comprehensive income	14,490	(15,904)	4,255	(24,436)
Total comprehensive income (loss)	91,779	56,623	137,968	114,934
Cash dividends declared - $0.46 per share and $0.40 per share for the six months ended June 30, 2014 and 2013, respectively			(36,779)	(33,030)
Cash dividends declared per share (in dollars per share)	$ 0.23	$ 0.20	$ 0.46	$ 0.40
Issuance of shares under benefit plans			11,195	23,907
Purchase of shares for treasury			(119,333)	(69,677)
Transactions with Noncontrolling Interests			(2,266)
Balance at the end of the period	1,521,473	1,394,455	1,521,473	1,394,455
Shareholders' Equity
Changes in equity
Balance at the beginning of the period			1,526,602	1,342,373
Comprehensive income:
Net income including non-controlling interests			133,785	139,412
Other comprehensive income			3,550	(24,387)
Total comprehensive income (loss)			137,335	115,025
Cash dividends declared - $0.46 per share and $0.40 per share for the six months ended June 30, 2014 and 2013, respectively			(36,779)	(33,030)
Issuance of shares under benefit plans			11,195	23,907
Purchase of shares for treasury			(119,333)	(69,677)
Transactions with Noncontrolling Interests			(1,484)
Balance at the end of the period	1,517,536	1,378,598	1,517,536	1,378,598
Noncontrolling Interests
Changes in equity
Balance at the beginning of the period			4,086	15,948
Comprehensive income:
Net income including non-controlling interests			(72)	(42)
Other comprehensive income			705	(49)
Total comprehensive income (loss)			633	(91)
Cash dividends declared - $0.46 per share and $0.40 per share for the six months ended June 30, 2014 and 2013, respectively			0	0
Issuance of shares under benefit plans			0	0
Purchase of shares for treasury			0	0
Transactions with Noncontrolling Interests			(782)
Balance at the end of the period	$ 3,937	$ 15,857	$ 3,937	$ 15,857