Note 10 - Income Taxes - The Components of the Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Postretirement benefits	$ 6,489	$ 6,047
Allowance for loan losses	6,490	6,414
Stock based compensation	2,717	2,808
Depreciation	615	1,057
Unrealized loss on securities available for sale	7,028	3,150
Fair value adjustment on financial assets carried at fair value	227	168
Fair value hedges	638	939
Adjustment required to recognize funded status of postretirement pension plans	751	2,068
Gain on sale of buildings	1,220	1,434
Other	3,113	299
Net operating loss (NYC)	928
Deferred tax assets	30,216	24,384
Deferred tax liabilities:
FPFC deferred income	2,263	1,916
Cashflow hedges	1,664	129
Fair value adjustment on financial liabilities carried at fair value	5,815	7,800
Entity specific fair value	382
Other	6,132	4,239
Deferred tax liabilities	16,256	14,084
Net deferred tax asset included in other assets	$ 13,960	$ 10,300