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Note 9 - Financing Arrangements, Portfolio Investments (Details) - Outstanding Repurchase Agreement Borrowings by Contractual Maturity (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
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Dec. 31, 2012
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| Note 9 - Financing Arrangements, Portfolio Investments (Details) - Outstanding Repurchase Agreement Borrowings by Contractual Maturity [Line Items] | ||
| Outstanding repurchase agreement by contractual maturity | $ 791,125 | $ 889,134 |
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Maturity up to 30 days [Member]
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| Note 9 - Financing Arrangements, Portfolio Investments (Details) - Outstanding Repurchase Agreement Borrowings by Contractual Maturity [Line Items] | ||
| Outstanding repurchase agreement by contractual maturity | 509,564 | 765,593 |
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Maturity 30 to 90 Days [Member]
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| Note 9 - Financing Arrangements, Portfolio Investments (Details) - Outstanding Repurchase Agreement Borrowings by Contractual Maturity [Line Items] | ||
| Outstanding repurchase agreement by contractual maturity | $ 281,561 | $ 123,541 |