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FHLB Advances, Other Borrowings and Junior Subordinated Notes Subordinated notes payable and junior subordinated notes payable (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Subordinated Borrowing [Line Items]
Borrowed funds	$ 217,917,000	$ 69,680,000
Repayment of subordinated notes payable	7,875,000	0	$ 0
Unamortized Debt Issuance Cost, Subordinated Notes	377,000
Subordinated Debt
Subordinated Borrowing [Line Items]
Borrowed funds	23,713,000	$ 22,498,000
Maturity date September 21, 2024 | Subordinated Debt
Subordinated Borrowing [Line Items]
Borrowed funds	$ 15,000,000
Fixed rate	6.50%
Maturity date April 15, 2027 | Subordinated Debt
Subordinated Borrowing [Line Items]
Borrowed funds	$ 9,100,000
Fixed rate	6.00%

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- Definition

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+ References

No definition available.

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- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets before its maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

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