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Cash and Cash Equivalents	12 Months Ended
	Dec. 31, 2017
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and due from banks was approximately $17.1 million and $14.6 million at December 31, 2017 and 2016, respectively. Required reserves in the form of either vault cash or deposits held at the FRB were $16.8 million and $6.4 million at December 31, 2017 and 2016, respectively. FRB balances were $17.7 million and $40.9 million at December 31, 2017 and 2016, respectively, and are included in short-term investments on the Consolidated Balance Sheets. Short-term investments, considered cash equivalents, were $35.5 million and $62.9 million at December 31, 2017 and 2016, respectively.

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- Definition

The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 305
-URI http://asc.fasb.org/topic&trid=2122426

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