Investments (Tables)

3 Months Ended

Mar. 31, 2018

Held-to-maturity Securities [Table Text Block]

Below is a summary of the amortized cost and estimated market values of the Company’s marketable securities as of March 31, 2018, and December 31, 2017.

	March 31, 2018				December 31, 2017
	Amortized		Market		Amortized		Market
	Cost		Value		Cost		Value
	(Dollars in thousands)
Municipal bonds:
Current	$	5,326	$	5,331	$	5,970	$	5,977
Due from one through five years		10,142		10,331		10,260		10,536
Due from six through ten years		5,424		5,497		5,005		5,197
Due from eleven through twenty years		2,620		2,685		2,404		2,539
Total	$	23,512	$	23,844	$	23,639	$	24,249

Unrealized Gain (Loss) on Investments [Table Text Block]

The unrealized gains and losses on marketable securities at March 31, 2018, and at December 31, 2017, were as follows:

	March 31, 2018				December 31, 2017
	Unrealized		Unrealized		Unrealized		Unrealized
	Gains		Losses		Gains		Losses
	(Dollars in thousands)
Municipal bonds	$	415	$	(83)	$	634	$	(24)

- Definition

Tabular disclosure of all investments in certain debt and equity securities for which the entity has the positive intent and ability to hold until maturity.

+ References + Details