ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Changes in accumulated other comprehensive income
Balance at the beginning of the period		$ 9,444
Other comprehensive income before reclassifications		7,934
Amounts reclassified from accumulated other comprehensive income		(306)
Other comprehensive income (loss)	3,374	7,628
Balance at the end of period	17,072	17,072
Foreign Currency
Changes in accumulated other comprehensive income
Balance at the beginning of the period		(530)
Other comprehensive income before reclassifications		1,965
Other comprehensive income (loss)		1,965
Balance at the end of period	1,435	1,435
Pension and Other Benefits
Changes in accumulated other comprehensive income
Balance at the beginning of the period		7,264
Amounts reclassified from accumulated other comprehensive income		(38)
Other comprehensive income (loss)		(38)
Balance at the end of period	7,226	7,226
Unrealized Gains on Marketable Securities
Changes in accumulated other comprehensive income
Balance at the beginning of the period		1,913
Other comprehensive income before reclassifications		3,501
Amounts reclassified from accumulated other comprehensive income		(21)
Other comprehensive income (loss)		3,480
Balance at the end of period	5,393	5,393
Unrealized Gain from Equity Method Investees' Cash Flow Hedge
Changes in accumulated other comprehensive income
Balance at the beginning of the period		797
Other comprehensive income before reclassifications		2,468
Amounts reclassified from accumulated other comprehensive income		(247)
Other comprehensive income (loss)		2,221
Balance at the end of period	$ 3,018	$ 3,018