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CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (USD $)
3 Months Ended
Mar. 31, 2012
Mar. 26, 2011
NET INCOME $ 3,516,000 $ 3,026,300
Unrealized net gains on marketable securities:    
Reclassification adjustment for net gains included in net income (28,000) 0
OTHER COMPREHENSIVE INCOME (LOSS), BEFORE TAX (28,000) 0
Unrealized net gains on marketable securities:    
Reclassification adjustment for net gains included in net income 11,000 0
OTHER COMPREHENSIVE LOSS, NET OF TAX (17,000) 0
COMPREHENSIVE INCOME $ 3,499,000 $ 3,026,300