Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details)

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Note 10 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Cash and due from banks $ 64,912 $ 86,213 [1]
Available for sale debt securities 560,635 538,080 [1]
Equity securities 1,026 1,034 [1]
Federal funds sold 197,882 239,524 [1]
Mortgage loans held for sale 4,522 4,459 [1]
Bank owned life insurance contracts 128,296 127,519 [1]
Held to maturity debt securities 250 250 [1]
Net Loans 5,866,277 5,791,855 [1]
Federal funds purchased 326,399 301,797 [1]
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and due from banks 118,223 238,062
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Available for sale debt securities 554,032 531,580
Equity securities 1,026 1,034
Federal funds sold 197,882 239,524
Mortgage loans held for sale 4,522 4,459
Bank owned life insurance contracts 128,296 127,519
Deposits 5,977,387 6,091,674
Federal funds purchased 326,399 301,797
Other borrowings 64,739 64,832
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Available for sale debt securities 6,603 6,500
Held to maturity debt securities 250 250
Net Loans 5,830,178 5,756,954
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and due from banks 118,223 238,062
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Available for sale debt securities 554,032 531,580
Equity securities 1,026 1,034
Federal funds sold 197,882 239,524
Mortgage loans held for sale 4,522 4,459
Bank owned life insurance contracts 128,296 127,519
Deposits 5,969,531 6,086,085
Federal funds purchased 326,399 301,797
Other borrowings 65,799 65,921
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Available for sale debt securities 6,603 6,500
Held to maturity debt securities 250 250
Net Loans $ 5,769,403 $ 5,712,441
[1] derived from audited financial statements