Consolidated Statement of Changes in Shareholders' Equity - USD ($) $ in Thousands	Preferred Stock Series A [Member]	Additional Paid In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Class A - Common stock	Class B - Common stock	Total
Balance at Dec. 31, 2015	$ 18,856	$ 110,494	$ (104,879)	$ (3,919)	$ (5,249)	$ 394	$ 56,408	$ 193	$ 72,298
Balance (in shares) at Dec. 31, 2015							28,204,000	1,928,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)			6,253			342			6,595
Other comprehensive income, net of reclassifications and taxes				1,003					1,003
Distributions to non controlling interests						(234)			(234)
Common stock conversion from Class B to Class A			(8)				$ 9	$ (1)
Common stock conversion from Class B to Class A (in shares)							4,000	(3,000)
Repurchase of preferred stock	(6,651)	(3,341)							(9,992)
Treasury shares issued for compensation		(231)			270				39
Stock options exercised		(11)					$ 40		$ 29
Stock options exercised (in shares)							20,000		20,000
Stock option expense		64							$ 64
Balance at Sep. 30, 2016	12,205	106,975	(98,634)	(2,916)	(4,979)	502	$ 56,457	$ 192	69,802
Balance (in shares) at Sep. 30, 2016							28,228,000	1,925,000
Balance at Dec. 31, 2016	0	99,667	(94,512)	(5,219)	(4,965)	625	$ 56,484	$ 193	52,273
Balance (in shares) at Dec. 31, 2016							28,242,055	1,924,629
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	7,094	0	0	298	$ 0	$ 0	7,392
Other comprehensive income, net of reclassifications and taxes	0	0	0	939	0	0	0	0	939
Distributions to non controlling interests	0	0	0	0	0	(224)	0	0	(224)
Common stock conversion from Class B to Class A	0	0	(148)	0	0	0	$ 155	$ (7)	0
Common stock conversion from Class B to Class A (in shares)							78,000	(68,000)
Treasury shares issued for compensation	0	(239)	0	0	336	0	$ 0	$ 0	97
Stock options exercised	0	7	0	0	0	0	$ 43	0	$ 50
Stock options exercised (in shares)							21,000		21,333
Stock option expense	0	48	0	0	0	0	$ 0	0	$ 48
Balance at Sep. 30, 2017	$ 0	$ 99,483	$ (87,566)	$ (4,280)	$ (4,629)	$ 699	$ 56,682	$ 186	$ 60,575
Balance (in shares) at Sep. 30, 2017							28,341,078	1,857,072