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Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value Measurement [Abstract]

Summary of marketable securities consist of investments

Marketable securities consist of the following investments (in thousands):


		June 30, 2012												December 31, 2011
		Cost				Gross Unrealized Gains				Recorded Basis				Cost				Gross Unrealized Gains (Losses)				Recorded Basis				Fair Value Category
Current:
Available-for-sale:
Municipal bonds		$	3,374			$	4			$	3,378			$	5,804			$	8			$	5,812				2
Corporate bonds			10,853				9				10,862				11,070				(4	)			11,066				2

		$	14,227			$	13			$	14,240			$	16,874			$	4			$	16,878

Long term:
Available-for-sale:
Municipal bonds		$	299			$	0			$	299			$	0			$	0			$	0				2
Corporate bonds			15,100				18				15,118				14,971				(33	)			14,938				2
U.S. treasuries			1,558				2				1,560				0				0				0				1
Held-to-maturity:
Corporate bonds			462				0				462				457				0				457				2

		$	17,419			$	20			$	17,439			$	15,428			$	(33	)		$	15,395

Summary of company's restricted marketable securities and workers' compensation deposits

The Company’s restricted marketable securities component of restricted marketable securities and workers’ compensation deposits consists of the following (in thousands):


		June 30, 2012												December 31, 2011
		Cost				Gross Unrealized Gains (Losses)				Recorded Basis				Cost				Gross Unrealized Gains (Losses)				Recorded Basis				Fair Value Category
Available-for-sale:
Municipal bonds		$	5,190			$	20			$	5,210			$	5,580			$	17			$	5,597				2
Corporate bonds			927				(1	)			926				148				(1	)			147				2
U.S. treasuries			1,567				0				1,567				1,567				0				1,567				1

		$	7,684			$	19			$	7,703			$	7,295			$	16			$	7,311