Note 4 - Investment Securities - Investment Securities Available for Sale Classified by Contractual Maturity (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Due in one year or less, amortized cost $ 213,876 [1] $ 9,570 [2]
Due in one year or less, fair value 213,885 [1] 9,574 [2]
Due after one year through five years, amortized cost 40,335 [1] 61,368 [2]
Due after one year through five years, fair value 40,270 [1] 61,467 [2]
Due after five years through ten years, amortized cost 45,840 [1] 53,193 [2]
Due after five years through ten years, fair value 44,914 [1] 53,070 [2]
Due after ten years, amortized cost 18,079 [1] 20,904 [2]
Due after ten years, fair value 18,055 [1] 21,141 [2]
Subtotal, amortized cost 318,130 [1] 145,035 [2]
Subtotal, fair value 317,124 [1] 145,252 [2]
Securities with no stated maturity, amortized cost 235,485 187,178
Securities with no stated maturity, fair value 234,644 188,488
Total, amortized cost 553,615 332,213
Total, fair value $ 551,768 $ 333,740
[1] Included in the investment portfolio, but not in the table above, are mutual funds with an amortized cost and fair value, as of December 31, 2015, of $15.6 million and $15.2 million, respectively, which have no stated maturity.
[2] Included in the investment portfolio, but not in the table above, are mutual funds with both an amortized cost and fair value, as of December 31, 2014, of $15.6 million, which have no stated maturity.