Note 5 - Mortgage Loan Servicing (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Mortgage Loans Serviced for Others [Table Text Block]

	2021		2020
Mortgage loan portfolios serviced for:
Federal Home Loan Mortgage Corporation	$	1,320,550,000	$	1,030,211,000
Federal Home Loan Bank		23,505,000		8,717,000
Total mortgage loans serviced for others	$	1,344,055,000	$	1,038,928,000

Servicing Asset at Amortized Cost [Table Text Block]

	2021			2020
Balance at beginning of year	$	8,189,000		$	4,652,000
Additions		7,711,000			6,467,000
Amortized to expense		(3,652,000	)		(2,930,000	)
Balance at end of year	$	12,248,000		$	8,189,000

Schedule of Mortgage Servicing Rights Future Amortization Expense [Table Text Block]

2022	$	1,186,000
2023		992,000
2024		814,000
2025		654,000
2026		516,000
Thereafter		8,086,000