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Loans - Major Classifications - Loan Concentrations (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Oct. 28, 2016
Total real estate | Customer concentration risk
Loans
Loans receivable as a percentage of total portfolio		79.70%
Total real estate | Loan receivables | Customer concentration risk
Loans
Loans receivable as a percentage of total portfolio	78.90%
Talmer
Loans
Loans			$ 221.0

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- Definition

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+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472

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