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	48,000	6,000		48,000
Stock-based compensation to employees and other	352,000			352,000
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 $33)	64,000				60,000			4,000
Dividends paid	(43,000)							(43,000)
Purchase of majority ownership of subsidiary	1,281,000							1,281,000
Net changes in non-controlling interest	93,000			269,000				(176,000)
Net income (loss)	(2,195,000)					(3,518,000)	1,025,000	298,000
Capital, end of period at Mar. 31, 2014	$ 565,470,000	$ 11,000	$ 31,000	$ 101,572,000	$ 93,000	$ 81,073,000	$ 19,958,000	$ 362,732,000
Capital, end of period (in shares) at Mar. 31, 2014		10,610,281	30,968,877,000