Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value Measurements [Abstract]

Schedule of fair Value, Assets and Liabilities Measured on Recurring basis

The following table provides the financial assets and liabilities carried at fair value measured on a recurring basis:

	Total Fair Value			Level 1		Level 2		Level 3
March 31, 2012:
Assets:
Assets held in rabbi trusts	$	33,143		$	21,368	$	11,775	$	-
Available for sale securities	$	7,153			7,153		-		-
	$	40,296		$	28,521	$	11,775	$	-
Liabilities:
Embedded derivative - convertible debentures due 2040	$	(490	)	$	-	$	-	$	(490	)
Embedded derivative - convertible debentures due 2041	$	(317	)		-		-		(317	)
	$	(807	)	$	-	$	-	$	(807	)
December 31, 2011:
Assets:
Assets held in rabbi trusts	$	31,698		$	20,569	$	11,129	$	-
Available for sale securities	$	6,776			6,776		-		-
	$	38,474		$	27,345	$	11,129	$	-
Liabilities:
Embedded derivative - convertible debentures due 2040	$	(594	)	$	-	$	-	$	(594	)
Embedded derivative - convertible debentures due 2041	$	(392	)		-		-		(392	)
	$	(986	)	$	-	$	-	$	(986	)