Annual report pursuant to Section 13 and 15(d)

Note 3 - Loans - Analysis of Allowance for Loans Losses by Portfolio Segment (Details)

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Note 3 - Loans - Analysis of Allowance for Loans Losses by Portfolio Segment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Balance, beginning of year $ 68,600 $ 59,406 $ 51,893
Charge-offs (22,489) (12,753) (16,332)
Recoveries 429 545 620
Allocation from LGP 7,406 0 0
Provision 22,638 21,402 23,225
Balance, end of year 76,584 68,600 59,406
Individually Evaluated for Impairment 9,804 8,128  
Collectively Evaluated for Impairment 66,780 60,472  
Ending Balance 7,261,451 6,533,499  
Individually Evaluated for Impairment 43,148 38,591  
Collectively Evaluated for Impairment 7,218,303 6,494,908  
Commercial Real Estate Portfolio Segment [Member]      
Balance, beginning of year 39,016 32,880  
Charge-offs (15,015) (11,428)  
Recoveries 306 349  
Allocation from LGP 4,905    
Provision 14,454 17,215  
Balance, end of year 43,666 39,016 32,880
Individually Evaluated for Impairment 6,085 6,066  
Collectively Evaluated for Impairment 37,581 32,950  
Ending Balance 2,696,210 2,513,225  
Individually Evaluated for Impairment 20,843 18,444  
Collectively Evaluated for Impairment 2,675,367 2,494,781  
Real Estate Portfolio Segment[Member]      
Ending Balance 3,979,060 3,422,589  
Real Estate Portfolio Segment[Member] | Construction Loans [Member]      
Balance, beginning of year 3,522 4,989  
Charge-offs 0 0  
Recoveries 3 112  
Allocation from LGP 115    
Provision (872) (1,579)  
Balance, end of year 2,768 3,522 4,989
Individually Evaluated for Impairment 86 126  
Collectively Evaluated for Impairment 2,682 3,396  
Ending Balance 521,392 533,192  
Individually Evaluated for Impairment 4,320 1,461  
Collectively Evaluated for Impairment 517,072 531,731  
Real Estate Portfolio Segment[Member] | Real Estate Loan [Member]      
Balance, beginning of year 25,508 21,022  
Charge-offs (6,882) (1,042)  
Recoveries 13 46  
Allocation from LGP 2,386    
Provision 8,628 5,482  
Balance, end of year 29,653 25,508 21,022
Individually Evaluated for Impairment 3,633 1,887  
Collectively Evaluated for Impairment 26,020 23,621  
Ending Balance 3,979,060 3,422,589  
Individually Evaluated for Impairment 17,985 18,637  
Collectively Evaluated for Impairment 3,961,075 3,403,952  
Consumer Portfolio Segment [Member]      
Balance, beginning of year 554 515  
Charge-offs (592) (283)  
Recoveries 107 38  
Allocation from LGP 0    
Provision 428 284  
Balance, end of year 497 554 $ 515
Individually Evaluated for Impairment 0 49  
Collectively Evaluated for Impairment 497 505  
Ending Balance 64,789 64,493  
Individually Evaluated for Impairment 0 49  
Collectively Evaluated for Impairment $ 64,789 $ 64,444