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Notes Payable - Additional Information (Detail) (USD $)
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12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2009
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Dec. 31, 2010
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Dec. 31, 2011
Frost Gamma Investment Trust [Member]
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Dec. 31, 2012
Frost Gamma Investment Trust [Member]
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Dec. 31, 2012
Nfs Forgivable Loans [Member]
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Dec. 31, 2011
Nfs Forgivable Loans [Member]
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Nov. 04, 2011
Nfs Forgivable Loans [Member]
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Dec. 31, 2009
Nfs Forgivable Loans [Member]
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Dec. 31, 2010
Premier Trust Note [Member]
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Sep. 01, 2010
Premier Trust Note [Member]
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Dec. 31, 2011
Securities America Notes [Member]
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Dec. 31, 2012
Securities America Notes [Member]
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Nov. 04, 2011
Securities America Notes [Member]
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Dec. 31, 2012
Revolving Credit Facility [Member]
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Dec. 31, 2011
Revolving Credit Facility [Member]
Frost Gamma Investment Trust [Member]
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Dec. 31, 2007
Revolving Credit Facility [Member]
Frost Gamma Investment Trust [Member]
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Aug. 16, 2011
Revolving Credit Facility [Member]
Frost Gamma Investment Trust [Member]
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Oct. 19, 2007
Revolving Credit Facility [Member]
Frost Gamma Investment Trust [Member]
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| Debt Instrument [Line Items] | ||||||||||||||||||||
| Fair value of notes payable | $ 187,385,000 | $ 184,883,000 | ||||||||||||||||||
| Line of Credit Facility, Amount Outstanding | 40,000,000 | 40,000,000 | 30,000,000 | |||||||||||||||||
| Line of Credit Facility, Interest Rate During Period | 11.00% | |||||||||||||||||||
| Funding Fees | 804,000 | 150,000 | ||||||||||||||||||
| Line of Credit Facility, Increase, Additional Borrowings | 10,000,000 | |||||||||||||||||||
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 2,000,000 | |||||||||||||||||||
| Exercise Price | 1.91 | 1.68 | ||||||||||||||||||
| Debt Issuance Cost | 3,200,000 | |||||||||||||||||||
| Notes payable, net of $7,120 and $9,113 unamoritized discount in 2012 and 2011, respectively | 197,979,000 | 197,184,000 | 1,161,000 | |||||||||||||||||
| Imputed Interest Rate | 36.00% | |||||||||||||||||||
| Loans Payable | 15,000,000 | 7,143,000 | 160,700,000 | |||||||||||||||||
| Effective Rate | 5.25% | 2.00% | 6.25% | 6.00% | ||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum | 11.00% | 6.50% | 11.00% | |||||||||||||||||
| Annual Installment | 2,143,000 | |||||||||||||||||||
| Principal Payable | 1,786,000 | 1,429,000 | 1,425,000 | |||||||||||||||||
| Interest Payables | 446,000 | 450,000 | 525,000 | |||||||||||||||||
| Number of Shares | 17,122,332,000 | 10,713,332,000 | ||||||||||||||||||
| Secured Loan Securities Value | 213,000 | |||||||||||||||||||
| Debt Instrument, Decrease, Forgiveness | 919,000 | |||||||||||||||||||
| Warrants issued to lenders | $ 9,428,000 | |||||||||||||||||||