Investments (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities

The cost and carrying value of available-for-sale investments were as follows (in thousands):

March 31, 2015	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Carrying Value
Debt securities: corporate bonds	$	8,194	$	239	$	(20	)	$	8,413
Marketable equity securities	11,358		7,136		(91		)	18,403
Total	$	19,552	$	7,375	$	(111	)	$	26,816

December 31, 2014	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Carrying Value
Debt securities: corporate bonds	$	8,909	$	198	$	(65	)	$	9,042
Marketable equity securities	14,780		7,335		(125		)	21,990
Total	$	23,689	$	7,533	$	(190	)	$	31,032

Schedule of Unrealized Loss on Investments

The following tables summarize the market value of those investments in an unrealized loss position for periods less than or greater than 12 months (in thousands):

	March 31, 2015				December 31, 2014
Less than 12 months	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
Debt securities: corporate bonds	$	1,996	$	20	$	3,228	$	65
Marketable equity securities	843		91		1,807		122
Total	$	2,839	$	111	$	5,035	$	187

	March 31, 2015				December 31, 2014
Greater than 12 months	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
Debt securities: corporate bonds
Marketable equity securities					$	9	$	3
Total	$	—	$	—	$	9	$	3

Investments Classified by Contractual Maturity Date [Table Text Block]

Actual maturity dates may differ from contractual maturity dates because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties (in thousands):

	March 31, 2015				December 31, 2014
	Amortized Cost		Carrying Value		Amortized Cost		Carrying Value
Due in one year or less	$	3,781	$	3,941	$	3,786	$	3,958
Due after one year through five years	2,549		2,548		3,310		3,255
Due after five years	1,864		1,924		1,813		1,829
	$	8,194	$	8,413	$	8,909	$	9,042