Stock Options and Restricted Stock Awards - Stock Option Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock Option Plans
Outstanding at Beginning of Year	1,807,100	1,721,000
Granted	238,000	135,000
Exercised	(74,850)	(37,900)
Forfeitures	(8,600)	(11,000)
Outstanding at End of Year	1,961,650	1,807,100	1,721,000
Options Exercisable at End of Year	992,050	721,100
Weighted Average Exercise Price
Outstanding at Beginning of Year	$ 6.24	$ 5.68
Granted	12.47	12.52
Exercised	3.45	2.78
Forfeitures	10.65	7.61
Outstanding at End of Year	7.08	6.24	$ 5.68
Options Exercisable at End of Year	$ 5.01	$ 4.19
Compensation expense for stock options	$ 721	$ 799	$ 368

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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