Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 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
June 30, 2012:
Assets:
Assets held in rabbi trusts	$	33,097		$	21,511	$	11,586	$	-
Available for sale securities	$	6,705			6,705		-		-
	$	39,802		$	28,216	$	11,586	$	-
Liabilities:
Embedded derivative - convertible debentures due 2040	$	(561	)	$	-	$	-	$	(561	)
Embedded derivative - convertible debentures due 2041	$	(426	)		-		-		(426	)
Embedded derivative - convertible debentures due 2042	$	(278	)		-		-		(278	)
	$	(1,265	)	$	-	$	-	$	(1,265	)
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	)