SUMMARY OF QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (Details 11) (Instruments designated as accounting hedges:, USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013 Interim Financial Information	Mar. 31, 2013 Interim Financial Information	Dec. 31, 2012 Interim Financial Information	Jun. 30, 2012 Interim Financial Information	Mar. 31, 2012 Interim Financial Information	Dec. 31, 2011 Interim Financial Information	Sep. 30, 2013 Foreign currency forwards Other current assets	Sep. 30, 2012 Foreign currency forwards Other current assets	Jun. 30, 2013 Foreign currency forwards Other current assets Interim Financial Information	Mar. 31, 2013 Foreign currency forwards Other current assets Interim Financial Information	Dec. 31, 2012 Foreign currency forwards Other current assets Interim Financial Information	Jun. 30, 2012 Foreign currency forwards Other current assets Interim Financial Information	Mar. 31, 2012 Foreign currency forwards Other current assets Interim Financial Information	Dec. 31, 2011 Foreign currency forwards Other current assets Interim Financial Information	Sep. 30, 2013 Foreign currency forwards Other noncurrent assets	Sep. 30, 2012 Foreign currency forwards Other noncurrent assets	Jun. 30, 2013 Foreign currency forwards Other noncurrent assets Interim Financial Information	Mar. 31, 2013 Foreign currency forwards Other noncurrent assets Interim Financial Information	Dec. 31, 2012 Foreign currency forwards Other noncurrent assets Interim Financial Information	Jun. 30, 2012 Foreign currency forwards Other noncurrent assets Interim Financial Information	Mar. 31, 2012 Foreign currency forwards Other noncurrent assets Interim Financial Information	Dec. 31, 2011 Foreign currency forwards Other noncurrent assets Interim Financial Information	Sep. 30, 2013 Foreign currency forwards Other current liabilities	Sep. 30, 2012 Foreign currency forwards Other current liabilities	Jun. 30, 2013 Foreign currency forwards Other current liabilities Interim Financial Information	Mar. 31, 2013 Foreign currency forwards Other current liabilities Interim Financial Information	Dec. 31, 2012 Foreign currency forwards Other current liabilities Interim Financial Information	Jun. 30, 2012 Foreign currency forwards Other current liabilities Interim Financial Information	Mar. 31, 2012 Foreign currency forwards Other current liabilities Interim Financial Information	Dec. 31, 2011 Foreign currency forwards Other current liabilities Interim Financial Information	Sep. 30, 2013 Foreign currency forwards Other noncurrent liabilities	Sep. 30, 2012 Foreign currency forwards Other noncurrent liabilities	Jun. 30, 2013 Foreign currency forwards Other noncurrent liabilities Interim Financial Information	Mar. 31, 2013 Foreign currency forwards Other noncurrent liabilities Interim Financial Information	Dec. 31, 2012 Foreign currency forwards Other noncurrent liabilities Interim Financial Information	Jun. 30, 2012 Foreign currency forwards Other noncurrent liabilities Interim Financial Information	Mar. 31, 2012 Foreign currency forwards Other noncurrent liabilities Interim Financial Information	Dec. 31, 2011 Foreign currency forwards Other noncurrent liabilities Interim Financial Information	Sep. 30, 2013 Forward starting swap Other noncurrent assets	Jun. 30, 2013 Forward starting swap Other noncurrent assets Interim Financial Information	Sep. 30, 2012 Forward starting swap Other noncurrent liabilities	Mar. 31, 2013 Forward starting swap Other noncurrent liabilities Interim Financial Information	Dec. 31, 2012 Forward starting swap Other noncurrent liabilities Interim Financial Information
Derivative instruments and hedging activities
Asset derivatives:	$ 7,693	$ 7,492	$ 10,552	$ 8,130	$ 5,164	$ 5,119	$ 5,238	$ 3,197	$ 1,597	$ 3,779	$ 3,918	$ 2,827	$ 2,552	$ 648	$ 2,197	$ 1,001	$ 4,957	$ 3,713	$ 5,181	$ 5,303	$ 2,612	$ 4,471	$ 3,041	$ 2,196																	$ 1,139	$ 1,453
Liability derivatives:	$ 7,726	$ 13,337	$ 9,163	$ 13,979	$ 9,868	$ 10,081	$ 8,184	$ 11,201																	$ 2,360	$ 6,839	$ 3,469	$ 6,809	$ 5,564	$ 3,071	$ 1,687	$ 5,955	$ 5,366	$ 6,407	$ 5,694	$ 7,006	$ 3,831	$ 7,010	$ 6,497	$ 5,246			$ 91	$ 164	$ 473