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Consolidated Statements of Changes in Stockholders' Equity Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Unrealized holding gain on marketable securities-taxes $ 2,217 $ (447)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax 252 (75)
Accumulated Other Comprehensive Income (Loss) [Member]
    
Unrealized holding gain on marketable securities-taxes 447 54
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax   $ 75