CONSOLIDATED STATEMENTS OF CASH FLOWS - (UNAUDITED) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Cash flows from operating activities
Net income	$ 6,831	$ 7,022
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of fixed assets	833	660
Amortization of core deposit intangibles	385	88
Gain on mortgage servicing rights	(1,137)	0
Stock-based compensation expense	419	328
Provision expense for loan losses	6,064	851
Net securities premium amortization	1,035	837
Net gain on sales of securities	(1,428)	0
Originations of loans held for sale	(221,401)	(108,134)
Proceeds from sales of loans	220,081	92,942
Net gain on sales of loans	(7,135)	(3,436)
Accretion on acquired purchase credit impaired loans	(868)	(1,175)
Gain on sale of other real estate owned and repossessed assets	(185)	0
Increase in cash surrender value of life insurance	(235)	(126)
Amortization of debt issuance costs	17	29
Net increase in accrued interest receivable and other assets	(24,508)	(2,949)
Net increase in accrued interest payable and other liabilities	12,030	5,356
Net cash used by operating activities	(9,202)	(7,707)
Cash flows from investing activities
Net increase in loans	(366,554)	(37,609)
Principal payments on securities available-for-sale	17,335	8,631
Purchases of securities available-for-sale	(38,739)	(51,373)
Additions to premises and equipment	(473)	(704)
Proceeds from:
Sale of securities available-for-sale	37,589	35,465
Sale of other real estate owned and repossessed assets	2,217	0
Net cash used in acquisition	(29,464)	0
Net cash used in investing activities	(378,089)	(45,590)
Cash flows from financing activities
Net increase in deposits	421,103	94,810
Change in short-term borrowings	(65,699)	(52,604)
Issuances of FRB borrowings related to Paycheck Protection Program	270,437	0
Issuances of long-term FHLB advances	22,950	30,000
Change in secured borrowing	(34)	(36)
Share buyback - redeemed stock	(620)	(1,620)
Common stock dividends paid	(695)	(542)
Proceeds from exercised stock options	95	156
Payments related to tax-withholding for share based compensation awards	(64)	(43)
Net cash provided by financing activities	647,473	70,121
Net change in cash and cash equivalents	260,182	16,824
Beginning cash and cash equivalents	103,930	33,296
Ending cash and cash equivalents	364,112	50,120
Supplemental disclosure of cash flow information:
Interest paid	9,016	9,569
Taxes paid	1,952	1,196
Transfer from loans held for sale to loans held for investment	816	1,429
Transfer from loans to other real estate owned	1,172	$ 373
Ann Arbor Bancorp, Inc
Increase in assets and liabilities in acquisitions:
Assets acquired—Ann Arbor State Bank	324,465
Liabilities assumed—Ann Arbor State Bank	$ 283,350