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
Jun. 30, 2018
Dec. 31, 2017
Cash and due from banks $ 68,344 $ 86,213 [1]
Available for sale debt securities 583,549 538,080 [1]
Equity securities 993 1,034 [1]
Federal funds sold 15,585 239,524 [1]
Mortgage loans held for sale 4,605 4,459 [1]
Bank-owned life insurance contracts 129,082 127,519 [1]
Held to maturity debt securities 250 250 [1]
Net Loans 6,065,410 5,791,855 [1]
Federal funds purchased 262,659 301,797 [1]
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and due from banks 150,086 238,062
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Available for sale debt securities 577,024 531,580
Equity securities 993 1,034
Federal funds sold 15,585 239,524
Mortgage loans held for sale 4,605 4,459
Bank-owned life insurance contracts 129,082 127,519
Deposits 6,085,682 6,091,674
Federal funds purchased 262,659 301,797
Other borrowings 64,648 64,832
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Available for sale debt securities 6,525 6,500
Held to maturity debt securities 250 250
Net Loans 6,033,312 5,756,954
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and due from banks 150,086 238,062
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Available for sale debt securities 577,024 531,580
Equity securities 993 1,034
Federal funds sold 15,585 239,524
Mortgage loans held for sale 4,605 4,459
Bank-owned life insurance contracts 129,082 127,519
Deposits 6,078,286 6,086,085
Federal funds purchased 262,659 301,797
Other borrowings 65,677 65,921
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Available for sale debt securities 6,525 6,500
Held to maturity debt securities 250 250
Net Loans $ 5,961,354 $ 5,712,441
[1] derived from audited financial statements