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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 | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Loans individually evaluated for impairment |  |
Individually Evaluated - Allowance | $ 14,495 | $ 13,284
Individually Evaluated - Balance | 189,311 | 200,780
Loans collectively evaluated for impairment |  |
Collectively Evaluated - Allowance | 154,643 | 160,605
Collectively Evaluated - Balance | 8,112,971 | 7,883,783
Total allowance | 169,138 | 173,889
Total balance | 8,302,282 | 8,084,563
Commercial Loans [Member] |  |
Loans individually evaluated for impairment |  |
Individually Evaluated - Allowance | 4,663 | 2,519
Individually Evaluated - Balance | 30,013 | 31,968
Loans collectively evaluated for impairment |  |
Collectively Evaluated - Allowance | 60,119 | 62,584
Collectively Evaluated - Balance | 2,199,867 | 2,266,756
Total allowance | 64,782 | 65,103
Total balance | 2,229,880 | 2,298,724
Real Estate Construction Loans [Member] |  |
Loans individually evaluated for impairment |  |
Individually Evaluated - Allowance | 3,129 | 3,460
Individually Evaluated - Balance | 33,859 | 34,420
Loans collectively evaluated for impairment |  |
Collectively Evaluated - Allowance | 7,497 | 8,539
Collectively Evaluated - Balance | 219,973 | 187,281
Total allowance | 10,626 | 11,999
Total balance | 253,832 | 221,701
Commercial Mortgage Loans [Member] |  |
Loans individually evaluated for impairment |  |
Individually Evaluated - Allowance | 6,165 | 6,584
Individually Evaluated - Balance | 106,913 | 114,544
Loans collectively evaluated for impairment |  |
Collectively Evaluated - Allowance | 75,161 | 78,169
Collectively Evaluated - Balance | 4,086,074 | 3,908,507
Total allowance | 81,326 | 84,753
Total balance | 4,192,987 | 4,023,051
Residential Mortgage And Equity Lines Member |  |
Loans individually evaluated for impairment |  |
Individually Evaluated - Allowance | 538 | 721
Individually Evaluated - Balance | 18,526 | 19,848
Loans collectively evaluated for impairment |  |
Collectively Evaluated - Allowance | 11,839 | 11,284
Collectively Evaluated - Balance | 1,595,099 | 1,506,684
Total allowance | 12,377 | 12,005
Total balance | 1,613,625 | 1,526,532
Installment And Other Loans [Member] |  |
Loans collectively evaluated for impairment |  |
Collectively Evaluated - Allowance | 27 | 29
Collectively Evaluated - Balance | 11,958 | 14,555
Total allowance | 27 | 29
Total balance | $ 11,958 | $ 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=28368275&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=28368275&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=28368275&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=28368275&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 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 4: 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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