Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Securities - Amortized Cost And Fair Value Of Available For Sale And Held To Maturity Securities (Details)

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Note 4 - Securities - Amortized Cost And Fair Value Of Available For Sale And Held To Maturity Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Available for sale, amortized cost $ 453,384 $ 423,330
Available for sale, gross unrealized gain 3,101 3,033
Available for sale, gross unrealized loss (2,529) (3,988)
Available for sale, fair value 453,956 422,375
Held to maturity, amortized cost 72,057 62,564
Held to maturity, gross unrealized gain 1,414 1,010
Held to maturity, gross unrealized loss (291) (272)
Held to maturity debt securities, fair value 73,180 63,302
US Treasury and Government [Member]    
Available for sale, amortized cost 57,732 45,998
Available for sale, gross unrealized gain 408 382
Available for sale, gross unrealized loss (106) (126)
Available for sale, fair value 58,034 46,254
Collateralized Mortgage Backed Securities [Member]    
Available for sale, amortized cost 254,225 228,843
Available for sale, gross unrealized gain 1,315 1,515
Available for sale, gross unrealized loss (2,155) (3,168)
Available for sale, fair value 253,385 227,190
Held to maturity, amortized cost 28,658 19,164
Held to maturity, gross unrealized gain 312 321
Held to maturity, gross unrealized loss (269) (245)
Held to maturity debt securities, fair value 28,701 19,240
US States and Political Subdivisions Debt Securities [Member]    
Available for sale, amortized cost 136,431 139,504
Available for sale, gross unrealized gain 1,372 1,120
Available for sale, gross unrealized loss (268) (694)
Available for sale, fair value 137,535 139,930
Held to maturity, amortized cost 5,889 5,888
Held to maturity, gross unrealized gain 308 315
Held to maturity, gross unrealized loss (6) (12)
Held to maturity debt securities, fair value 6,191 6,191
Corporate Debt Securities [Member]    
Available for sale, amortized cost 4,996 8,985
Available for sale, gross unrealized gain 6 16
Available for sale, gross unrealized loss
Available for sale, fair value 5,002 9,001
Held to maturity, amortized cost 37,510 37,512
Held to maturity, gross unrealized gain 794 374
Held to maturity, gross unrealized loss (16) (15)
Held to maturity debt securities, fair value $ 38,288 $ 37,871