Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Restrictions on Cash (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Restrictions on Cash (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Restrictions on Cash [Abstract]    
Cash on hand or on deposit with the Federal Reserve Bank required to meet regulatory reserve and clearing requirements $ 7.0 $ 6.1