Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2015

Summary of Marketable Securities Consist of Investments

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


	June 30, 2015							December 31, 2014
	Cost		Gross Unrealized Gains (Losses)			Recorded Basis		Cost		Gross Unrealized Gains (Losses)			Recorded Basis		Fair Value Category
Current:
Available-for-sale:
VRDN	$	0	$	0		$	0	$	21,670	$	0		$	21,670		2
Certificates of deposit		0		0			0		8,330		(43	)		8,287		2

	$	0	$	0		$	0	$	30,000	$	(43	)	$	29,957

Long term:
Available-for-sale:
Municipal bonds	$	3,438	$	6		$	3,444	$	3,843	$	7		$	3,850		2
Corporate bonds		2,607		(3	)		2,604		2,153		(3	)		2,150		2
Certificates of deposit		0		0			0		14,944		(14	)		14,930		2

	$	6,045	$	3		$	6,048	$	20,940	$	(10	)	$	20,930

Summary of Restricted Marketable Securities Component 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, 2015							December 31, 2014
	Cost		Gross Unrealized Gains (Losses)			Recorded Basis		Cost		Gross Unrealized Gains (Losses)			Recorded Basis		Fair Value Category
Current:
Available-for-sale:
Money market funds held in trust	$	21,343	$	0		$	21,343	$	3,776	$	0		$	3,776		2

	$	21,343	$	0		$	21,343	$	3,776	$	0		$	3,776

Long term:
Available-for-sale:
Money market funds held in trust	$	88,153	$	0		$	88,153	$	46,310	$	0		$	46,310		2
Municipal bonds		3,952		10			3,962		4,352		21			4,373		2
Corporate bonds		4,002		(4	)		3,998		3,540		(3	)		3,537		2
U.S. treasuries		5,080		0			5,080		3,963		0			3,963		1

	$	101,187	$	6		$	101,193	$	58,165	$	18		$	58,183

Schedule of Restricted Certificates of Deposit

The Company’s restricted certificates of deposit are summarized as follows (in thousands):


	June 30, 2015						December 31, 2014
	Cost		Gross Unrealized Gains		Recorded Basis		Cost		Gross Unrealized Gains		Recorded Basis		Fair Value Category
Current:
Restricted certificates of deposit	$	26,015	$	0	$	26,015	$	0	$	0	$	0		2

	$	26,015	$	0	$	26,015	$	0	$	0	$	0


Long term:
Restricted certificates of deposit	$	88,320	$	0	$	88,320	$	114,335	$	0	$	114,335		2

	$	88,320	$	0	$	88,320	$	114,335	$	0	$	114,335