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Investment securities - Restricted Investment In Stock (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) security	Mar. 31, 2019 USD ($)
Available-for-sale and Held-to-maturity securities
Proceeds from sales of investment securities available-for-sale | $	$ 26,502
Number of securities in continuous unrealized loss position	24
Other-than-temporary impairments recognized | $	$ 0
State and Municipals, Tax-exempt
Available-for-sale and Held-to-maturity securities
Number of securities in continuous unrealized loss position	5
State and Municipals, Taxable
Available-for-sale and Held-to-maturity securities
Number of securities in continuous unrealized loss position	8
U.S. government-sponsored enterprises state and municipals
Available-for-sale and Held-to-maturity securities
Other-than-temporary impairments recognized | $	$ 0	$ 0
Mortgage-backed Securities, U.S. government-sponsored enterprises
Available-for-sale and Held-to-maturity securities
Number of securities in continuous unrealized loss position	11
Number of securities in continuous unrealized loss positions 12 months or longer	10

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- Definition

The number of securities in continuous unrealized loss position.

+ References

No definition available.

+ Details

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- Definition

Number of securities in continuous unrealized loss position for more than 12 months.

+ References

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- Definition

Amount of cash inflow from sale of available-for sale investments.

+ References

No definition available.

+ Details

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- Definition

Amount, before tax, of other-than-temporary impairment (OTTI) on investment in debt security measured at amortized cost (held-to-maturity), recognized in earnings and other comprehensive income (OCI).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 8A
-URI http://asc.fasb.org/extlink&oid=118954083&loc=SL6284422-111562

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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