Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Loans - Loans Categorized by Past Due Status (Details)

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Note 5 - Loans - Loans Categorized by Past Due Status (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Accrual loans, past due $ 40,060 $ 18,439
Non-accrual 9,271 10,765
Current 5,878,996 5,822,057
Loans 5,928,327 5,851,261 [1]
Financing Receivables, 30 to 59 Days Past Due [Member]    
Accrual loans, past due 1,388 7,143
Financing Receivables, 60 to 89 Days Past Due [Member]    
Accrual loans, past due 37,994 11,236
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]    
Accrual loans, past due 678 60
Commercial Real Estate Portfolio Segment [Member]    
Accrual loans, past due 11,222 7,124
Non-accrual 8,599 9,712
Current 2,310,083 2,262,530
Loans 2,329,904 2,279,366
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]    
Accrual loans, past due 309 1,410
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]    
Accrual loans, past due 10,495 5,702
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]    
Accrual loans, past due 418 12
Real Estate Portfolio Segment[Member]    
Accrual loans, past due 21,133 10,060
Non-accrual 634 1,015
Current 3,008,892 2,917,733
Loans 3,030,659 2,928,808
Real Estate Portfolio Segment[Member] | Construction Loans [Member]    
Accrual loans, past due 7,619 1,053
Non-accrual
Current 498,431 579,821
Loans 506,050 580,874
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]    
Accrual loans, past due 3,779 3,664
Non-accrual 306 556
Current 1,345,594 1,324,446
Loans 1,349,679 1,328,666
Real Estate Portfolio Segment[Member] | One to Four Family [Member]    
Accrual loans, past due 2,146 1,280
Non-accrual 328 459
Current 579,024 601,324
Loans 581,498 603,063
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]    
Accrual loans, past due 15,208 5,116
Non-accrual
Current 1,084,274 991,963
Loans 1,099,482 997,079
Real Estate Portfolio Segment[Member] | Financing Receivables, 30 to 59 Days Past Due [Member]    
Accrual loans, past due 1,060 5,546
Real Estate Portfolio Segment[Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Construction Loans [Member]    
Accrual loans, past due 56
Real Estate Portfolio Segment[Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Owner Occupied Commercial [Member]    
Accrual loans, past due 115
Real Estate Portfolio Segment[Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | One to Four Family [Member]    
Accrual loans, past due 564 430
Real Estate Portfolio Segment[Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Other Mortgages [Member]    
Accrual loans, past due 381 5,116
Real Estate Portfolio Segment[Member] | Financing Receivables, 60 to 89 Days Past Due [Member]    
Accrual loans, past due 19,856 4,514
Real Estate Portfolio Segment[Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Construction Loans [Member]    
Accrual loans, past due 7,619 997
Real Estate Portfolio Segment[Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Owner Occupied Commercial [Member]    
Accrual loans, past due 3,664 3,664
Real Estate Portfolio Segment[Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | One to Four Family [Member]    
Accrual loans, past due 1,365 850
Real Estate Portfolio Segment[Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Other Mortgages [Member]    
Accrual loans, past due 14,827
Real Estate Portfolio Segment[Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]    
Accrual loans, past due 217
Real Estate Portfolio Segment[Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Construction Loans [Member]    
Accrual loans, past due
Real Estate Portfolio Segment[Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Owner Occupied Commercial [Member]    
Accrual loans, past due
Real Estate Portfolio Segment[Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | One to Four Family [Member]    
Accrual loans, past due 217
Real Estate Portfolio Segment[Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Other Mortgages [Member]    
Accrual loans, past due
Consumer Portfolio Segment [Member]    
Accrual loans, past due 86 202
Non-accrual 38 38
Current 61,590 61,973
Loans 61,714 62,213
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]    
Accrual loans, past due 19 131
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]    
Accrual loans, past due 24 23
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]    
Accrual loans, past due $ 43 $ 48
[1] derived from audited financial statements