Note 5 - Mortgage Loan Servicing (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Mortgage Loans Serviced for Others [Table Text Block]

	2020		2019
Mortgage loan portfolios serviced for:
Federal Home Loan Mortgage Corporation	$	1,030,211,000	$	711,643,000
Federal Home Loan Bank		8,717,000		15,317,000
Total mortgage loans serviced for others	$	1,038,928,000	$	726,960,000

Servicing Asset at Amortized Cost [Table Text Block]

	2020			2019
Balance at beginning of year	$	4,652,000		$	4,436,000
Additions		6,467,000			1,962,000
Amortized to expense		(2,930,000	)		(1,746,000	)
Balance at end of year	$	8,189,000		$	4,652,000

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

2021	$	1,724,000
2022		1,476,000
2023		1,241,000
2024		1,026,000
2025		834,000
Thereafter		1,888,000