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Investments (Tables)

6 Months Ended

Jun. 30, 2018

Investments [Abstract]

Debt Securities, Held-to-maturity [Table Text Block]

Below is a summary of the amortized cost and estimated market values of the Company’s marketable securities as of June 30, 2018, and December 31, 2017.

		June 30, 2018								December 31, 2017
		Amortized				Market				Amortized				Market
		Cost				Value				Cost				Value
		(Dollars in thousands)
Municipal bonds:
Current		$	8,781			$	8,783			$	5,970			$	5,977
Due from one through five years			9,550				9,719				10,260				10,536
Due from six through ten years			5,261				5,332				5,005				5,197
Due from eleven through twenty years			2,610				2,675				2,404				2,539
Total		$	26,202			$	26,509			$	23,639			$	24,249

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

The unrealized gains and losses on marketable securities at June 30, 2018, and at December 31, 2017, were as follows:

		June 30, 2018								December 31, 2017
		Unrealized				Unrealized				Unrealized				Unrealized
		Gains				Losses				Gains				Losses
		(Dollars in thousands)
Municipal bonds		$	394			$	(87	)		$	634			$	(24	)

X

- Definition

Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

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- Definition

Tabular disclosure of unrealized gains and losses on investments.

+ References

No definition available.

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