Acquisitions (Details) - Talmer - USD ($)	Dec. 31, 2016	Oct. 28, 2016
Business Acquisition [Line Items]
Loans		$ 223,800,000
Deposits	$ 48,900,000	48,900,000
Assets qcquired:
Cash on hand		122,000
Loans, net of purchase accounting adjustments		220,988,000
Premises and equipment, net		230,000
Goodwill		8,375,000
Core deposit intangible		659,000
Other assets acquired, including accrued interest, prepaids		573,000
Liabilities assumed:
Deposits- noninterest bearing demand		28,850,000
Deposits- interest bearing - Savings, NOW, Moneymarket		17,941,000
Deposits - Time		2,103,000
Other liabilities assumed, including escrow deposits and payables		574,000
Net assets acquired, or total cash paid for acquisition		$ 181,479,000
Acquisition expenses	$ 269,000