DERIVATIVE INSTRUMENTS (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended					9 Months Ended
	Aug. 31, 2011	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2007 agreement	Jun. 30, 2011	Dec. 31, 2007 Interest Rate Swap Agreements [Member]	Jun. 30, 2011 Interest Rate Swap Agreement One	Jun. 30, 2011 Interest Rate Swap Agreement Two	Sep. 30, 2014 Debt [Member]	Jun. 30, 2011 Notes Issued One	Jun. 30, 2015 Scenario, Forecast [Member]
Derivative [Line Items]
Number of forward starting interest rate swap agreements						15
Derviative, notional amount								$ 1,500,000,000	$ 500,000,000	$ 150,000,000
Payments for (Proceeds from) settlement of interest rate swap agreements	25,382,000					(89,777,000)
Loss reclassified from AOCI				3,762,000
Estimated amount of pretax loss in AOCI related to interest rate swap that would be reclassified to earnings within the next 12 months													4,153,000
Long-term notes issued							500,000,000
Interest rate							6.50%					10.125%
Interest rate spread above London Interbank Offered Rate (LIBOR)									4.05%	8.03%
Fixed interest rate under swap agreement									6.50%	10.125%
Forward component of the settlement	23,387,000
Accrued interest income	1,995,000
Amortized deferred gain		$ 493,000	$ 1,093,000	$ 10,171,000	$ 3,223,000						$ 8,032,000