Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Note 5 - Loans - Loans by Credit Quality Indicator (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Financing receivable, gross $ 5,928,327 $ 5,851,261
Pass [Member]    
Financing receivable, gross 5,825,833 5,751,507
Special Mention [Member]    
Financing receivable, gross 62,259 61,622
Substandard [Member]    
Financing receivable, gross 40,235 38,132
Doubtful [Member]    
Financing receivable, gross
Commercial Real Estate Portfolio Segment [Member]    
Financing receivable, gross 2,329,904 2,279,366
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]    
Financing receivable, gross 2,272,468 2,225,084
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]    
Financing receivable, gross 32,900 27,835
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]    
Financing receivable, gross 24,536 26,447
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]    
Financing receivable, gross
Real Estate Portfolio Segment[Member]    
Financing receivable, gross 3,030,659 2,928,808
Real Estate Portfolio Segment[Member] | Construction Loans [Member]    
Financing receivable, gross 506,050 580,874
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 1,349,679 1,328,666
Real Estate Portfolio Segment[Member] | One to Four Family [Member]    
Financing receivable, gross 581,498 603,063
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]    
Financing receivable, gross 1,099,482 997,079
Real Estate Portfolio Segment[Member] | Pass [Member]    
Financing receivable, gross 2,993,896 2,891,683
Real Estate Portfolio Segment[Member] | Pass [Member] | Construction Loans [Member]    
Financing receivable, gross 497,846 572,657
Real Estate Portfolio Segment[Member] | Pass [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 1,338,307 1,317,113
Real Estate Portfolio Segment[Member] | Pass [Member] | One to Four Family [Member]    
Financing receivable, gross 576,792 598,222
Real Estate Portfolio Segment[Member] | Pass [Member] | Other Mortgages [Member]    
Financing receivable, gross 1,078,797 976,348
Real Estate Portfolio Segment[Member] | Special Mention [Member]    
Financing receivable, gross 22,732 27,054
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Construction Loans [Member]    
Financing receivable, gross 6,623 6,691
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 7,401 7,333
Real Estate Portfolio Segment[Member] | Special Mention [Member] | One to Four Family [Member]    
Financing receivable, gross 1,599 1,599
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Other Mortgages [Member]    
Financing receivable, gross 13,732 18,122
Real Estate Portfolio Segment[Member] | Substandard [Member]    
Financing receivable, gross 14,031 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 3,971 4,220
Real Estate Portfolio Segment[Member] | Substandard [Member] | One to Four Family [Member]    
Financing receivable, gross 3,107 3,242
Real Estate Portfolio Segment[Member] | Substandard [Member] | Other Mortgages [Member]    
Financing receivable, gross 6,953 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 61,714 62,213
Consumer Portfolio Segment [Member] | Pass [Member]    
Financing receivable, gross 61,623 62,083
Consumer Portfolio Segment [Member] | Special Mention [Member]    
Financing receivable, gross 4 42
Consumer Portfolio Segment [Member] | Substandard [Member]    
Financing receivable, gross 87 88
Consumer Portfolio Segment [Member] | Doubtful [Member]    
Financing receivable, gross