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Note 7 - Loans (Details) - Allowance for Loan Losses by Portfolio Segment and Based on Impairment Method (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Loans individually evaluated for impairment |  |
Loans individually evaluated for impairment, allowance | $ 13,814 | $ 13,284
Loans individually evaluated for impairment, balance | 188,347 | 200,780
Loans collectively evaluated for impairment |  |
Loans collectively evaluated for impairment, allowance | 155,384 | 160,605
Loans collectively evaluated for impairment, balance | 8,669,907 | 7,883,783
Loans, allowance | 169,198 | 173,889
Loans | 8,858,254 | 8,084,563
Commercial Loans [Member] |  |
Loans individually evaluated for impairment |  |
Loans individually evaluated for impairment, allowance | 2,730 | 2,519
Loans individually evaluated for impairment, balance | 25,749 | 31,968
Loans collectively evaluated for impairment |  |
Loans collectively evaluated for impairment, allowance | 53,566 | 62,584
Loans collectively evaluated for impairment, balance | 2,424,369 | 2,266,756
Loans, allowance | 56,296 | 65,103
Loans | 2,450,118 | 2,298,724
Real Estate Construction Loans [Member] |  |
Loans individually evaluated for impairment |  |
Loans individually evaluated for impairment, allowance | 2,604 | 3,460
Loans individually evaluated for impairment, balance | 31,510 | 34,420
Loans collectively evaluated for impairment |  |
Loans collectively evaluated for impairment, allowance | 32,099 | 8,539
Loans collectively evaluated for impairment, balance | 269,949 | 187,281
Loans, allowance | 34,703 | 11,999
Loans | 301,459 | 221,701
Commercial Mortgage Loans [Member] |  |
Loans individually evaluated for impairment |  |
Loans individually evaluated for impairment, allowance | 7,999 | 6,584
Loans individually evaluated for impairment, balance | 115,559 | 114,544
Loans collectively evaluated for impairment |  |
Loans collectively evaluated for impairment, allowance | 58,740 | 78,169
Loans collectively evaluated for impairment, balance | 4,298,508 | 3,908,507
Loans, allowance | 66,739 | 84,753
Loans | 4,414,067 | 4,023,051
Residential Mortgage And Equity Lines Member |  |
Loans individually evaluated for impairment |  |
Loans individually evaluated for impairment, allowance | 481 | 721
Loans individually evaluated for impairment, balance | 15,529 | 19,848
Loans collectively evaluated for impairment |  |
Loans collectively evaluated for impairment, allowance | 10,962 | 11,284
Loans collectively evaluated for impairment, balance | 1,673,405 | 1,506,684
Loans, allowance | 11,443 | 12,005
Loans | 1,688,934 | 1,526,532
Installment And Other Loans [Member] |  |
Loans collectively evaluated for impairment |  |
Loans collectively evaluated for impairment, allowance | 17 | 29
Loans collectively evaluated for impairment, balance | 3,676 | 14,555
Loans, allowance | 17 | 29
Loans | $ 3,676 | $ 14,555

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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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