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FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Details) (USD $)
3 Months Ended 6 Months Ended
Dec. 31, 2011
Jun. 30, 2012
Level 1 [Member]
Jun. 30, 2011
Level 1 [Member]
Dec. 31, 2011
Level 1 [Member]
Dec. 31, 2010
Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Fair value at beginning of period   $ 1,316,000 $ 0 $ 1,679,000 $ 0
Investments during period   105,000 0    
Realized and unrealized gain (losses) included in other comprehensive income   (468,000) 0    
Fair value at end of period   1,316,000 0 1,679,000 0
Payments to acquire investment $ 1,572,000