Annual report pursuant to Section 13 and 15(d)

Note 23 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details)

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Note 23 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Cash and cash equivalents $ 86,213 $ 56,855
Debt securities available for sale 538,080 422,375
Debt securities held to maturity 250 62,564
Equity securities 1,034 1,024
Federal funds sold 239,524 160,435
Mortgage loans held for sale 4,459 4,675
Bank owned life insurance contracts 127,519 114,388
Available for sale debt securities, at fair value 538,080 422,375
Held to maturity debt securities (fair value of $250 and $63,302 at December 31, 2017 and December 31, 2016, respectively) 250 62,564
Loans, net 5,791,855 4,859,877
Federal funds purchased 301,797 355,944
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalents 238,062 623,562
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Debt securities available for sale 531,580 422,375
Debt securities held to maturity 25,052
Equity securities 1,034 1,024
Federal funds sold 239,524 160,435
Mortgage loans held for sale 4,459 4,675
Bank owned life insurance contracts 127,519 114,388
Available for sale debt securities, at fair value 531,580 422,375
Held to maturity debt securities (fair value of $250 and $63,302 at December 31, 2017 and December 31, 2016, respectively) 25,052
Deposits 6,091,674 5,420,311
Federal funds purchased 301,797 355,944
Other borrowings 64,832 55,262
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Debt securities available for sale 6,500
Debt securities held to maturity 250 37,512
Available for sale debt securities, at fair value 6,500
Held to maturity debt securities (fair value of $250 and $63,302 at December 31, 2017 and December 31, 2016, respectively) 250 37,512
Loans, net 5,791,855 4,859,877
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalents 238,062 623,562
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Debt securities available for sale 531,580 422,375
Debt securities held to maturity 25,431
Equity securities 1,034 1,024
Federal funds sold 239,524 160,435
Mortgage loans held for sale 4,459 4,736
Bank owned life insurance contracts 127,519 114,388
Available for sale debt securities, at fair value 531,580 422,375
Held to maturity debt securities (fair value of $250 and $63,302 at December 31, 2017 and December 31, 2016, respectively) 25,431
Deposits 6,086,085 5,417,320
Federal funds purchased 301,797 355,944
Other borrowings 65,921 54,203
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Debt securities available for sale 6,500
Debt securities held to maturity 250 37,871
Available for sale debt securities, at fair value 6,500
Held to maturity debt securities (fair value of $250 and $63,302 at December 31, 2017 and December 31, 2016, respectively) 250 37,871
Loans, net $ 5,747,342 $ 4,872,689