Other Borrowings Textuals (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	May. 31, 2015
Other Borrowings [Line Items]
Proceeds from Federal Home Loan Bank Advances	$ 100,000,000
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Weighted Average Interest Rate	1.48%
Long-term Federal Home Loan Bank Advances	$ 181,394,000		$ 34,300,000
FHLB Maturities, 2016	7,100,000
FHLB Maturities, 2017	47,100,000
FHLB Maturities, 2018	67,100,000
FHLB Maturities, 2019	100,000
FHLB Maturities, 2020	60,000,000
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available	250,000,000
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Prepayment Penalties	0	$ 800,000	$ 0
Nonrevolving line of credit	$ 25,000,000
Line of Credit Facility, Interest Rate at Period End	2.27%
Securities Sold under Agreements to Repurchase	$ 17,453,000
Securities Sold Under Agreements to Repurchase, Maturities in Year One	8,300,000
Securities Sold Under Agreements to Repurchase, Maturities, Due in Year Two	9,100,000
Trust Preferred Investment Security of Non Public Bank Company				$ 10,000,000
subordinated debt par value	1,000
Subordinated Debt	$ 18,544,000
Weighted-average interest rate, subordinated debt instruments	3.99%
Lake Michigan Financial Corp [Member]
Other Borrowings [Line Items]
Long-term Federal Home Loan Bank Advances				81,500,000
Federal Home Loan Bank, Advances, Weighted Average Interest Rate	1.33%
Securities Sold under Agreements to Repurchase				$ 23,700,000
Real Estate Residential Loans [Member]
Other Borrowings [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 1,340,000,000
LMFCTII [Member]
Other Borrowings [Line Items]
Subordinated Debt	$ 8,200,000
Subordinated Borrowing, Interest Rate	2.70%
Debt Instrument, Interest Rate, Effective Percentage	3.24%
LMFCTI [Member]
Other Borrowings [Line Items]
Subordinated Debt	$ 10,300,000
Subordinated Borrowing, Interest Rate	3.45%
Debt Instrument, Interest Rate, Effective Percentage	3.99%