Investment Securities Available for Sale (Tables)

3 Months Ended

Mar. 31, 2016

Available-for-sale Securities [Abstract]

Available-for-sale Securities

The components of investment securities available for sale at March 31, 2016 were as follows:

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Marketable equity securities	$	37,947	$	18,822	$	(238	)	$	56,531
Mutual funds invested in fixed income securities	20,215		77		—			20,292
Marketable debt securities	75,120		757		—			75,877
Total investment securities available for sale	$	133,282	$	19,656	$	(238	)	$	152,700

The components of investment securities available for sale at December 31, 2015 were as follows:

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Marketable equity securities	$	47,502	$	19,833	$	(62	)	$	67,273
Mutual funds invested in fixed income securities	20,126		—		(15		)	20,111
Marketable debt securities	94,540		52		—			94,592
Total investment securities available for sale	$	162,168	$	19,885	$	(77	)	$	181,976

Schedule of Maturity Dates of Fixed Income Securities

The table below summarizes the maturity dates of marketable debt securities at March 31, 2016.

Investment Type:	Market Value		Under 1 Year		1 Year up to 5 Years		More than 5 Years
U.S. Government securities	$	22,730	$	—	$	22,730	$	—
Corporate securities	35,592		433		35,159		—
U.S. mortgage-backed securities	5,369		605		4,764		—
Commercial mortgage-backed securities	5,605		4,526		1,079		—
U.S. asset-backed securities	4,443		3,857		586		—
Index-linked U.S. bonds	2,138		—		2,138		—
Total marketable debt securities by maturity dates	$	75,877	$	9,421	$	66,456	$	—

Schedule of Unrealized Loss on Investments

The available-for-sale investment securities with continuous unrealized losses for less than 12 months and 12 months or greater and their related fair values were as follows:

	In loss position for
	Less than 12 months					12 months or more
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses		Total Fair Value		Total Unrealized Losses
March 31, 2016
Marketable equity securities	$	5,762	$	(238	)	$	—	$	—	$	5,762	$	(238	)
	$	5,762	$	(238	)	$	—	$	—	$	5,762	$	(238	)
December 31, 2015
Marketable equity securities	$	5,938	$	(62	)	$	—	$	—	$	5,938	$	(62	)
Mutual funds invested in fixed income securities	10,053		(15		)	—		—		10,053		(15		)
	$	15,991	$	(77	)	$	—	$	—	$	15,991	$	(77	)

Schedule of Realized Gains (Losses)

Gross realized gains and losses on available-for-sale investment securities were as follows:

	Three Months Ended
	March 31,
	2016			2015
Gross realized gains on sales	$	759		$	13,564
Gross realized losses on sales	(192		)	(535		)
Gains on sale of investment securities available for sale	$	567		$	13,029
Gross realized losses on other-than-temporary impairments	$	(4,813	)	$	—