Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest income:
Loans, including loan fees	$ 33,778	$ 29,968
Investment securities:
Taxable	2,072	1,633
Tax-exempt	491	549
Other interest income	662	1,009
Total interest income	37,003	33,159
Interest expense:
Deposits	4,957	4,777
Short-term borrowings	27	0
Long-term borrowings	756	907
Total interest expense	5,740	5,684
Net interest income	31,263	27,475
Provision for credit losses	3,000	200
Net interest income after provision for credit losses	28,263	27,275
Noninterest income:
Mortgage income, net	2,327	1,203
BOLI income	703	459
Asset gains (losses), net	(654)	172
Other income	521	1,484
Total noninterest income	9,585	9,186
Noninterest expense:
Personnel	13,323	12,537
Occupancy, equipment and office	4,204	3,750
Business development and marketing	1,359	1,281
Data processing	2,563	2,355
Intangibles amortization	993	1,053
Other expense	1,412	1,783
Total noninterest expense	23,854	22,759
Income before income tax expense	13,994	13,702
Income tax expense	3,321	3,352
Net income	10,673	10,350
Less: Net income attributable to noncontrolling interest	118	83
Net income attributable to Nicolet Bankshares, Inc.	$ 10,555	$ 10,267
Earnings per common share:
Basic (in dollars per share)	$ 1.00	$ 1.09
Diluted (in dollars per share)	$ 0.98	$ 1.05
Weighted average common shares outstanding:
Basic (in shares)	10,515,778	9,461,485
Diluted (in shares)	10,800,636	9,758,351
Trust services fee income
Noninterest income:
Fees and commissions	$ 1,579	$ 1,468
Brokerage fee income
Noninterest income:
Fees and commissions	2,322	1,810
Service charges on deposit accounts
Noninterest income:
Fees and commissions	1,225	1,170
Card interchange income
Noninterest income:
Fees and commissions	$ 1,562	$ 1,420