Annual report pursuant to Section 13 and 15(d)

Note 4 - Loans - Analysis of Allowance for Loans Losses by Portfolio Segment (Details)

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Note 4 - Loans - Analysis of Allowance for Loans Losses by Portfolio Segment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Balance, beginning of year $ 51,893 $ 43,419 $ 35,629
Charge-offs (16,332) (5,198) (5,744)
Recoveries 620 274 687
Provision 23,225 13,398 12,847
Balance, end of year 59,406 51,893 43,419
Individually Evaluated for Impairment 5,609 8,152  
Collectively Evaluated for Impairment 53,797 43,741  
Loans 5,851,261 4,911,770  
Individually Evaluated for Impairment 40,510 45,589  
Collectively Evaluated for Impairment 5,810,751 4,866,181  
Commercial Real Estate Portfolio Segment [Member]      
Balance, beginning of year 28,872 21,495  
Charge-offs (13,910) (3,791)  
Recoveries 337 49  
Provision 17,581 11,119  
Balance, end of year 32,880 28,872 21,495
Individually Evaluated for Impairment 4,276 6,607  
Collectively Evaluated for Impairment 28,604 22,265  
Loans 2,279,366 1,982,267  
Individually Evaluated for Impairment 26,447 27,922  
Collectively Evaluated for Impairment 2,252,919 1,954,345  
Real Estate Portfolio Segment[Member]      
Loans 2,928,808 2,539,207  
Real Estate Portfolio Segment[Member] | Construction Loans [Member]      
Balance, beginning of year 5,125 5,432  
Charge-offs (56) (815)  
Recoveries 168 76  
Provision (248) 432  
Balance, end of year 4,989 5,125 5,432
Individually Evaluated for Impairment 120 923  
Collectively Evaluated for Impairment 4,869 4,202  
Loans 580,874 335,085  
Individually Evaluated for Impairment 1,571 4,314  
Collectively Evaluated for Impairment 579,303 330,771  
Real Estate Portfolio Segment[Member] | Real Estate Loan [Member]      
Balance, beginning of year 17,504 16,061  
Charge-offs (2,056) (380)  
Recoveries 89 146  
Provision 5,485 1,677  
Balance, end of year 21,022 17,504 16,061
Individually Evaluated for Impairment 1,163 622  
Collectively Evaluated for Impairment 19,859 16,882  
Loans 2,928,808 2,539,207  
Individually Evaluated for Impairment 12,404 13,350  
Collectively Evaluated for Impairment 2,916,404 2,525,857  
Consumer Portfolio Segment [Member]      
Balance, beginning of year 392 431  
Charge-offs (310) (212)  
Recoveries 26 3  
Provision 407 170  
Balance, end of year 515 392 $ 431
Individually Evaluated for Impairment 50  
Collectively Evaluated for Impairment 465 392  
Loans 62,213 55,211  
Individually Evaluated for Impairment 88 3  
Collectively Evaluated for Impairment $ 62,125 $ 55,208