Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2018

The following is a summary of available-for-sale securities at:



($ in thousands)		June 30, 2018				December 31, 2017
Marketable Securities:	Fair Value Hierarchy	Cost		Fair Value		Cost		Fair Value
Certificates of deposit
with unrecognized losses for less than 12 months		$	6,625	$	6,563	$	6,238	$	6,222
with unrecognized losses for more than 12 months		987		984		102		100
with unrecognized gains		—		—		2,088		2,089
Total Certificates of deposit	Level 1	7,612		7,547		8,428		8,411
U.S. Treasury and agency notes
with unrecognized losses for less than 12 months		30,010		29,780		29,741		29,669
with unrecognized losses for more than 12 months		137		136		137		135
with unrecognized gains		3		4		152		153
Total U.S. Treasury and agency notes	Level 2	30,150		29,920		30,030		29,957
Corporate notes
with unrecognized losses for less than 12 months		21,856		21,662		18,230		18,159
with unrecognized losses for more than 12 months		2,499		2,479		2,804		2,788
with unrecognized gains		—		—		—		—
Total Corporate notes	Level 2	24,355		24,141		21,034		20,947
Municipal notes
with unrecognized losses for less than 12 months		6,995		6,948		10,298		10,288
with unrecognized losses for more than 12 months		955		943		999		987
with unrecognized gains		453		453		277		278
Total Municipal notes	Level 2	8,403		8,344		11,574		11,553
		$	70,520	$	69,952	$	71,066	$	70,868

The following tables summarize the maturities, at par, of marketable securities as of: