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
Sep. 30, 2018
Dec. 31, 2017
Financing receivable, gross $ 6,363,531 $ 5,851,261
Pass [Member]    
Financing receivable, gross 6,227,413 5,751,507
Special Mention [Member]    
Financing receivable, gross 100,226 61,622
Substandard [Member]    
Financing receivable, gross 35,892 38,132
Doubtful [Member]    
Financing receivable, gross
Commercial Real Estate Portfolio Segment [Member]    
Financing receivable, gross 2,478,788 2,279,366
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]    
Financing receivable, gross 2,413,994 2,225,084
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]    
Financing receivable, gross 41,656 27,835
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]    
Financing receivable, gross 23,138 26,447
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]    
Financing receivable, gross
Real Estate Portfolio Segment[Member]    
Financing receivable, gross 3,277,525 2,928,808
Real Estate Portfolio Segment[Member] | Construction Loans [Member]    
Financing receivable, gross 543,611 580,874
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 1,430,111 1,328,666
Real Estate Portfolio Segment[Member] | One to Four Family [Member]    
Financing receivable, gross 610,460 603,063
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]    
Financing receivable, gross 1,236,954 997,079
Real Estate Portfolio Segment[Member] | Pass [Member]    
Financing receivable, gross 3,213,075 2,891,683
Real Estate Portfolio Segment[Member] | Pass [Member] | Construction Loans [Member]    
Financing receivable, gross 536,789 572,657
Real Estate Portfolio Segment[Member] | Pass [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 1,396,503 1,317,113
Real Estate Portfolio Segment[Member] | Pass [Member] | One to Four Family [Member]    
Financing receivable, gross 606,509 598,222
Real Estate Portfolio Segment[Member] | Pass [Member] | Other Mortgages [Member]    
Financing receivable, gross 1,210,063 976,348
Real Estate Portfolio Segment[Member] | Special Mention [Member]    
Financing receivable, gross 53,167 27,054
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Construction Loans [Member]    
Financing receivable, gross 5,400 6,691
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 30,101 7,333
Real Estate Portfolio Segment[Member] | Special Mention [Member] | One to Four Family [Member]    
Financing receivable, gross 2,600 1,599
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Other Mortgages [Member]    
Financing receivable, gross 20,466 18,122
Real Estate Portfolio Segment[Member] | Substandard [Member]    
Financing receivable, gross 11,283 10,071
Real Estate Portfolio Segment[Member] | Substandard [Member] | Construction Loans [Member]    
Financing receivable, gross 1,422 1,526
Real Estate Portfolio Segment[Member] | Substandard [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 3,507 4,220
Real Estate Portfolio Segment[Member] | Substandard [Member] | One to Four Family [Member]    
Financing receivable, gross 1,351 3,242
Real Estate Portfolio Segment[Member] | Substandard [Member] | Other Mortgages [Member]    
Financing receivable, gross 6,425 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 63,607 62,213
Consumer Portfolio Segment [Member] | Pass [Member]    
Financing receivable, gross 63,555 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