Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Loans - Analysis of Allowance for Loans Losses by Portfolio Segment (Details)

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Note 5 - Loans - Analysis of Allowance for Loans Losses by Portfolio Segment (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Balance, beginning of period $ 59,406 [1] $ 51,893  
Charge-offs (1,557) (3,196)  
Recoveries 62 209  
Provision 4,139 4,986  
Balance, end of period 62,050 53,892  
Individually Evaluated for Impairment 6,478   $ 5,609
Collectively Evaluated for Impairment 55,572   53,797
Loans 5,928,327   5,851,261 [1]
Individually Evaluated for Impairment 42,576   40,510
Collectively Evaluated for Impairment 5,885,751   5,810,751
Commercial Real Estate Portfolio Segment [Member]      
Balance, beginning of period 32,880 28,872  
Charge-offs (1,088) (2,855)  
Recoveries 4 190  
Provision 3,991 2,500  
Balance, end of period 35,787 28,707  
Individually Evaluated for Impairment 5,877   4,276
Collectively Evaluated for Impairment 29,910   28,604
Loans 2,329,904   2,279,366
Individually Evaluated for Impairment 24,536   26,447
Collectively Evaluated for Impairment 2,305,368   2,252,919
Real Estate Portfolio Segment[Member]      
Loans 3,030,659   2,928,808
Real Estate Portfolio Segment[Member] | Construction Loans [Member]      
Balance, beginning of period 4,989 5,125  
Charge-offs  
Recoveries 7 16  
Provision (858) (316)  
Balance, end of period 4,138 4,825  
Individually Evaluated for Impairment 120   120
Collectively Evaluated for Impairment 4,018   4,869
Loans 506,050   580,874
Individually Evaluated for Impairment 1,625   1,571
Collectively Evaluated for Impairment 504,425   579,303
Real Estate Portfolio Segment[Member] | Real Estate Loan [Member]      
Balance, beginning of period 21,022 17,504  
Charge-offs (381) (266)  
Recoveries 42 2  
Provision 923 2,722  
Balance, end of period 21,606 19,962  
Individually Evaluated for Impairment 432   1,163
Collectively Evaluated for Impairment 21,174   19,859
Loans 3,030,659   2,928,808
Individually Evaluated for Impairment 16,328   12,404
Collectively Evaluated for Impairment 3,014,331   2,916,404
Consumer Portfolio Segment [Member]      
Balance, beginning of period 515 392  
Charge-offs (88) (75)  
Recoveries 9 1  
Provision 83 80  
Balance, end of period 519 $ 398  
Individually Evaluated for Impairment 49   50
Collectively Evaluated for Impairment 470   465
Loans 61,714   62,213
Individually Evaluated for Impairment 87   88
Collectively Evaluated for Impairment $ 61,627   $ 62,125
[1] derived from audited financial statements