Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt issuance costs	$ 1,506	$ 2,753
Voting Common Stock [Member]
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	12,500,000	12,500,000
Common stock, shares issued	2,905,757	2,905,757
Common stock, shares outstanding	2,905,757	2,905,757
Non-Voting Common Stock [Member]
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	37,500,000	37,500,000
Common stock, shares issued	12,897,614	12,779,646
Common stock, shares outstanding	12,897,614	12,779,646