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SUBSEQUENT EVENTS Acorn Dividend (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended 2 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Mar. 04, 2013
Subsequent Event [Member]
Subsequent Event [Line Items]                  
Common Stock, Dividends, Per Share, Declared           $ 0.140 $ 0.085 $ 0.000 $ 0.035
Total dividend paid - cash and shares $ 632 $ 628 $ 627 $ 1,496 $ 613 $ 3,383 $ 613   $ 633
Payments of Dividends 526 559 627 1,496 613 3,208 613 0 516
Stock Issued During Period, Value, Dividend Reinvestment Plan 106 69 0 0 0 175 0   117
Dividend reinvestment plan discount $ 6 $ 4 $ 0 $ 0 $ 0 $ 10 $ 0   $ 6
Stock Issued During Period, Shares, Dividend Reinvestment Plan 14,305 8,429 0 0 0 22,734 0   18,976