Annual report pursuant to Section 13 and 15(d)

Note 3 - Loans - Loans by Performance Status (Details)

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Note 3 - Loans - Loans by Performance Status (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Financing receivable, gross $ 7,261,451 $ 6,533,499
Performing Financial Instruments [Member]    
Financing receivable, gross 7,225,339 6,505,729
Nonperforming Financial Instruments [Member]    
Financing receivable, gross 36,112 27,770
Commercial Real Estate Portfolio Segment [Member]    
Financing receivable, gross 2,696,210 2,513,225
Commercial Real Estate Portfolio Segment [Member] | Performing Financial Instruments [Member]    
Financing receivable, gross 2,681,280 2,502,117
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]    
Financing receivable, gross 14,930 11,108
Real Estate Portfolio Segment[Member]    
Financing receivable, gross 3,979,060 3,422,589
Real Estate Portfolio Segment[Member] | Construction Loans [Member]    
Financing receivable, gross 521,392 533,192
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 1,587,478 1,463,887
Real Estate Portfolio Segment[Member] | One to Four Family [Member]    
Financing receivable, gross 644,188 621,634
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]    
Financing receivable, gross 1,747,394 1,337,068
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member]    
Financing receivable, gross 3,959,490 3,407,032
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | Construction Loans [Member]    
Financing receivable, gross 519,804 532,195
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 1,576,652 1,460,529
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | One to Four Family [Member]    
Financing receivable, gross 641,875 619,465
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | Other Mortgages [Member]    
Financing receivable, gross 1,740,963 1,327,038
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member]    
Financing receivable, gross 19,570 15,557
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | Construction Loans [Member]    
Financing receivable, gross 1,588 997
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 10,826 3,358
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | One to Four Family [Member]    
Financing receivable, gross 2,313 2,169
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | Other Mortgages [Member]    
Financing receivable, gross 6,431 10,030
Consumer Portfolio Segment [Member]    
Financing receivable, gross 64,789 64,493
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]    
Financing receivable, gross 64,766 64,385
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]    
Financing receivable, gross $ 23 $ 108