Consolidated Statement of Changes in Stockholders' Equity (USD $)	Total	Common stock Common Stock - Class A	Common stock Common Stock - Class B	Additional paid-in capital	Accumulated other comprehensive income	Appropriated retained earnings of consolidated TAMCO	Retained earnings	Non-controlling interest
Capital, beginning of period at Dec. 31, 2013	$ 565,856,000	$ 11,000	$ 31,000	$ 100,903,000	$ 33,000	$ 84,591,000	$ 18,933,000	$ 361,354,000
Capital, beginning of period (in shares) at Dec. 31, 2013		10,556,390	30,968,877,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation to directors for services rendered	105,000	14,112		105,000
Stock-based compensation to employees and other	443,000			443,000
Issuance of shares (in shares)	47,445
Contribution	14,000							14,000
Net unrealized gains and losses on available for sale securities (net of tax of $75)	148,000				139,000			9,000
Dividends paid	(87,000)							(87,000)
Purchase of majority ownership of subsidiary	1,276,000							1,276,000
Net changes in non-controlling interest	64,000			135,000				(71,000)
Net income (loss)	(6,540,000)					(8,187,000)	2,096,000	(449,000)
Capital, end of period at Jun. 30, 2014	$ 561,279,000	$ 11,000	$ 31,000	$ 101,586,000	$ 172,000	$ 76,404,000	$ 21,029,000	$ 362,046,000
Capital, end of period (in shares) at Jun. 30, 2014		10,617,947	30,968,877,000