Note 6 - Mortgage Loan Servicing (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Mortgage Loans Serviced for Others [Table Text Block]

	2016		2015
Mortgage loan portfolios serviced for:
Federal Home Loan Mortgage Corporation	$	597,389,000	$	598,510,000
Federal Home Loan Bank		10,501,000		4,675,000
Total mortgage loans serviced for others	$	607,890,000	$	603,185,000

Schedule of Servicing Assets at Fair Value [Table Text Block]

	2016			2015
Balance at beginning of year	$	6,121,000		$	6,712,000
Additions		1,378,000			1,487,000
Amortized to expense		(1,955,000	)		(2,078,000	)
Balance at end of year	$	5,544,000		$	6,121,000

Servicing Asset at Amortized Cost [Table Text Block]

2017	$	1,277,000
2018		1,057,000
2019		884,000
2020		729,000
2021		597,000
Thereafter		1,000,000