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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
NET INCOME (LOSS) $ 1,357 $ (456)
Other comprehensive income (loss), net of tax:    
Reclassification adjustment for realized gains on marketable securities included in net income (1)    [1] (4) [1]
Reclassification adjustment for unrealized losses on marketable securities included in net income (2)    [2] 15 [2]
Changes in fair value of marketable securities (3) 422 [3] 1,040 [3]
COMPREHENSIVE INCOME $ 1,779 $ 595
[1] Net of deferred income taxes of $0 and $(2), respectively.
[2] Net of deferred income taxes of $0 and $(9), respectively.
[3] Net of deferred income taxes of $259 and $655, respectively.