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Long-Term Borrowings - Summary of long-term Borrowings (Details 1) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Debt Instruments [Abstract]      
2017 $ 10,000,000    
2018 10,000,000    
Long-term borrowings $ 20,000,000 $ 20,000,000 $ 20,000,000