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Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurement [Abstract]

Summary of marketable securities consist of investments

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


		March 31, 2013												December 31, 2012
		Cost				Gross Unrealized Gains				Recorded Basis				Cost				Gross Unrealized Gains				Recorded Basis				Fair Value Category
Current:
Available-for-sale:
Municipal bonds		$	194			$	1			$	195			$	409			$	1			$	410				2
Corporate bonds			17,206				29				17,235				14,764				16				14,780				2
US treasuries			1,554				3				1,557				1,555				3				1,558				1

		$	18,954			$	33			$	18,987			$	16,728			$	20			$	16,748

Long term:
Available-for-sale:
Municipal bonds		$	1,938			$	3			$	1,941			$	292			$	1				293				2
Corporate bonds			8,854				11				8,865				9,111				28				9,139				2
Held-to-maturity:
Corporate bonds			470				0				470				467				0				467				2

		$	11,262			$	14			$	11,276			$	9,870			$	29			$	9,899

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):


		March 31, 2013												December 31, 2012
		Cost				Gross Unrealized Gains				Recorded Basis				Cost				Gross Unrealized Gains				Recorded Basis				Fair Value Category
Available-for-sale:
Municipal bonds		$	5,107			$	22			$	5,129			$	4,920			$	17			$	4,937				2
Corporate bonds			2,360				5				2,365				2,035				5				2,040				2
U.S. treasuries			2,092				0				2,092				1,780				0				1,780				1

		$	9,559			$	27			$	9,586			$	8,735			$	22			$	8,757