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Regulatory Matters (Details)
9 Months Ended
Sep. 30, 2017
Regulatory Matters [Abstract]  
Percentage of net profits from preceding period for which dividend is paid to surplus fund (in hundredths) 50.00%
Percentage of capital stock (in hundredths) 50.00%
Percentage of net profits from preceding period for which dividend is paid to surplus fund thereafter (in hundredths) 25.00%
Percentage of capital stock thereafter (in hundredths) 100.00%