This represents the Federal Home Loan Bank (FHLB) shares owned by the Company as of the balance sheet date. FHLB stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

No definition available.

Note 1 - Summary of Significant Accounting Policies (Details Textual)		12 Months Ended
	Jan. 01, 2018 USD ($)	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Number Of Limited Partnerships In Housing Investments		8
Percentage of Subsidiaries Common Securities Owned by Parent Company		100.00%
Gross Loans Comprised of Commercial Mortgage Loans Percentage		48.00%
Residential Mortgages Properties Percentage		26.40%
Gross Loans Comprised of Commercial Loans Percentage		19.60%
Federal Home Loan Bank Stock		$ 17,250,000	$ 23,085,000
Federal Home Loan Bank Stock Shares \| shares		172,500
Minimum Stock Requirement on Outstanding Federal Home Loan Bank Borrowings Shares \| shares		150,000
Maximum Loan Size Portfolio Stratification Homogenous Portfolio		$ 500,000
Variable Interest Entity, Primary Beneficiary, Number of Entities		9
Equity Securities, FV-NI, Unrealized Gain (Loss), Total		$ (2,787,000)
Number of Operating Segments		1
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings Tax Effect	$ 515,000
Accounting Standards Update 2016-01 [Member] \| Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 8,600,000	$ 8,600,000
Accounting Standards Update 2016-02 [Member] \| Minimum [Member]
Operating Lease, Liability, Total		32,000,000
Accounting Standards Update 2016-02 [Member] \| Maximum [Member]
Operating Lease, Liability, Total		$ 37,000,000
California [Member]
Residential Mortgages Properties Percentage		57.00%