3. Investments:

Investments held are summarized as follows (in thousands):


	December 31, 2017				December 31, 2016
	Short-Term		Long-Term		Short-Term		Long-Term
Municipal debt securities	$	8,312	$	46,195	$	10,306	$	46,513
Federal home loan securities		1,000		30,322		—		28,747
Certificates of deposit		980		4,165		980		3,715

	$	10,292	$	80,682	$	11,286	$	78,975

Contractual maturities of long-term investments are summarized as follows (in thousands):


	December 31,
	2017		2016
Due after one year through five years	$	78,561	$	70,005
Due after five years through six years		2,121		8,970

	$	80,682	$	78,975