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Strategic Investments (Details 1) - USD ($)
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Summary of Recorded value and fair value of strategic investments                
Recorded value $ 91,781,000 $ 90,730,000 $ 88,685,000 $ 97,424,000 $ 97,085,000 $ 145,345,000 $ 145,870,000 $ 142,870,000
Albemarle & Bond Holdings [Member]                
Summary of Recorded value and fair value of strategic investments                
Recorded value 0   $ 0   9,439,000      
Fair value 0       9,439,000      
Cash Converters International Limited [Member]                
Summary of Recorded value and fair value of strategic investments                
Recorded value 91,781,000       87,646,000      
Fair value $ 128,956,000       $ 165,663,000