DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES: (Details Textual) (USD $) In Millions, unless otherwise specified			1 Months Ended
	Dec. 31, 2012	Jun. 30, 2005	Jun. 30, 2005 Interest Rate Swap [Member] Derivative Agreement 1 [Member]	Jun. 30, 2005 Interest Rate Swap [Member] Derivative Agreement 2 [Member]	Jun. 30, 2005 Interest Rate Swap [Member] Derivative Agreement 3 [Member]	Jun. 30, 2005 Interest Rate Swap [Member] Derivative Agreement 4 [Member]
Derivative Agreement Face Amount Of Contract		$ 25.0
Derivative, Maturity Date			Jun. 30, 2007	Jun. 30, 2008	Jun. 30, 2010	Mar. 31, 2011
Percentage Of Award Amount	8.00%
Reassessed Estimated Fair Value Of Award	$ 11.4