Note 6 - Mortgage Loan Servicing (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Mortgage Loans Serviced for Others [Table Text Block]

	201 7		201 6
Mortgage loan portfolios serviced for:
Federal Home Loan Mortgage Corporation	$	600,495,000	$	597,389,000
Federal Home Loan Bank		13,136,000		10,501,000
Total mortgage loans serviced for others	$	613,631,000	$	607,890,000

Servicing Asset at Amortized Cost [Table Text Block]

	201 7			201 6
Balance at beginning of year	$	5,544,000		$	6,121,000
Additions		1,229,000			1,378,000
Amortized to expense		(1,667,000	)		(1,955,000	)
Balance at end of year	$	5,106,000		$	5,544,000

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

2018	$	1,213,000
2019		1,036,000
2020		867,000
2021		708,000
2022		557,000
Thereafter		725,000