Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Loans - Loans by Credit Quality Indicator (Details)

v3.10.0.1
Note 5 - Loans - Loans by Credit Quality Indicator (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Financing receivable, gross $ 6,129,649 $ 5,851,261
Pass [Member]    
Financing receivable, gross 6,025,395 5,751,507
Special Mention [Member]    
Financing receivable, gross 68,583 61,622
Substandard [Member]    
Financing receivable, gross 35,671 38,132
Doubtful [Member]    
Financing receivable, gross
Commercial Real Estate Portfolio Segment [Member]    
Financing receivable, gross 2,345,879 2,279,366
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]    
Financing receivable, gross 2,289,789 2,225,084
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]    
Financing receivable, gross 36,027 27,835
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]    
Financing receivable, gross 20,063 26,447
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]    
Financing receivable, gross
Real Estate Portfolio Segment[Member]    
Financing receivable, gross 3,193,921 2,928,808
Real Estate Portfolio Segment[Member] | Construction Loans [Member]    
Financing receivable, gross 522,788 580,874
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 1,383,882 1,328,666
Real Estate Portfolio Segment[Member] | One to Four Family [Member]    
Financing receivable, gross 584,133 603,063
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]    
Financing receivable, gross 1,225,906 997,079
Real Estate Portfolio Segment[Member] | Pass [Member]    
Financing receivable, gross 3,153,054 2,891,683
Real Estate Portfolio Segment[Member] | Pass [Member] | Construction Loans [Member]    
Financing receivable, gross 515,543 572,657
Real Estate Portfolio Segment[Member] | Pass [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 1,369,814 1,317,113
Real Estate Portfolio Segment[Member] | Pass [Member] | One to Four Family [Member]    
Financing receivable, gross 579,288 598,222
Real Estate Portfolio Segment[Member] | Pass [Member] | Other Mortgages [Member]    
Financing receivable, gross 1,203,952 976,348
Real Estate Portfolio Segment[Member] | Special Mention [Member]    
Financing receivable, gross 26,889 27,054
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Construction Loans [Member]    
Financing receivable, gross 5,664 6,691
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 10,042 7,333
Real Estate Portfolio Segment[Member] | Special Mention [Member] | One to Four Family [Member]    
Financing receivable, gross 1,350 1,599
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Other Mortgages [Member]    
Financing receivable, gross 15,497 18,122
Real Estate Portfolio Segment[Member] | Substandard [Member]    
Financing receivable, gross 13,978 10,071
Real Estate Portfolio Segment[Member] | Substandard [Member] | Construction Loans [Member]    
Financing receivable, gross 1,581 1,526
Real Estate Portfolio Segment[Member] | Substandard [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 4,026 4,220
Real Estate Portfolio Segment[Member] | Substandard [Member] | One to Four Family [Member]    
Financing receivable, gross 3,495 3,242
Real Estate Portfolio Segment[Member] | Substandard [Member] | Other Mortgages [Member]    
Financing receivable, gross 6,457 2,609
Real Estate Portfolio Segment[Member] | Doubtful [Member]    
Financing receivable, gross
Real Estate Portfolio Segment[Member] | Doubtful [Member] | Construction Loans [Member]    
Financing receivable, gross
Real Estate Portfolio Segment[Member] | Doubtful [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross
Real Estate Portfolio Segment[Member] | Doubtful [Member] | One to Four Family [Member]    
Financing receivable, gross
Real Estate Portfolio Segment[Member] | Doubtful [Member] | Other Mortgages [Member]    
Financing receivable, gross
Consumer Portfolio Segment [Member]    
Financing receivable, gross 67,061 62,213
Consumer Portfolio Segment [Member] | Pass [Member]    
Financing receivable, gross 67,009 62,083
Consumer Portfolio Segment [Member] | Special Mention [Member]    
Financing receivable, gross 3 42
Consumer Portfolio Segment [Member] | Substandard [Member]    
Financing receivable, gross 49 88
Consumer Portfolio Segment [Member] | Doubtful [Member]    
Financing receivable, gross