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Note 8 - Derivatives Instruments and Hedging Activities (Details) (USD $)
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12 Months Ended |
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Note 8 - Derivatives Instruments and Hedging Activities (Details) [Line Items] |
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| Payables to Broker-Dealers and Clearing Organizations |
$ 191,592,000 |
$ 245,931,000 |
$ 228,300,000 |
| Derivative Liability |
1,432,000 |
5,542,000 |
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| Derivative Assets (Liabilities), at Fair Value, Net |
300,000 |
100,000 |
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| Derivative, Net Liability Position, Aggregate Fair Value |
2,300,000 |
1,800,000 |
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| Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred |
1,600,000 |
|
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| Restricted Cash and Cash Equivalents |
44,100,000 |
46,500,000 |
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TBA [Member]
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| Note 8 - Derivatives Instruments and Hedging Activities (Details) [Line Items] |
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|
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| Derivative Liability |
191,600,000 |
245,900,000 |
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Approximation [Member]
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| Note 8 - Derivatives Instruments and Hedging Activities (Details) [Line Items] |
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| Payables to Broker-Dealers and Clearing Organizations |
0 |
245,600,000 |
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Interest Rate Swap [Member]
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|
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| Note 8 - Derivatives Instruments and Hedging Activities (Details) [Line Items] |
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|
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| Restricted Cash and Cash Equivalents |
$ 10,200,000 |
$ 19,800,000 |
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