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Borrowings - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Borrowings
Senior Notes	$ 44,083	$ 44,058
Total borrowings	188,099	246,615
Securities sold under repurchase agreements
Borrowings
Total borrowings	41,366	29,918
FHLBC advances
Borrowings
Total borrowings	45,000	115,000
Junior subordinated debentures
Borrowings
Total borrowings	$ 57,650	$ 57,639

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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

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

Reference 1: 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(a))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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