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Short-term borrowings (Details 2) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets Sold Under Agreements To Repurchase [Line Items]
Total borrowings	$ 244,759	$ 289,565
Repurchase agreement
Assets Sold Under Agreements To Repurchase [Line Items]
Total borrowings	4,409	74,215
Repurchase agreement | U.S. Treasury and U.S. government sponsored entities
Assets Sold Under Agreements To Repurchase [Line Items]
Total borrowings	332	4,811
Repurchase agreement | State and political subdivisions
Assets Sold Under Agreements To Repurchase [Line Items]
Total borrowings	664	20,696
Repurchase agreement | Mortgage-backed securities - residential
Assets Sold Under Agreements To Repurchase [Line Items]
Total borrowings	3,094	43,936
Repurchase agreement | Collateralized mortgage obligations
Assets Sold Under Agreements To Repurchase [Line Items]
Total borrowings	$ 319	$ 4,772

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+ References

No definition available.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(1))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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