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Investments in Equity Method Affiliates - Schedule of Investment in Equity Method Affiliates (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Schedule Of Investments In Equity Method Affiliates [Line Items] |  |  |
Beginning Balance | $ 6,076 | $ 2,106 | $ 477
Investments / advances | 4,716 | 5,031 | 5,783
Distributions / repayments | (12,093) | (7,293) | (9,983)
In-kind distribution |  |  | (55)
Earnings / (loss) realized | 5,052 | 6,232 | 5,884
Ending Balance | 1,910 | 6,076 | 2,106
Reorganization | (1,841) |  |
Star Asia Manager [Member] |  |  |
Schedule Of Investments In Equity Method Affiliates [Line Items] |  |  |
Beginning Balance | 1,046 | 202 | 343
Investments / advances |  |  |
Distributions / repayments | (1,600) | (850) | (975)
In-kind distribution |  |  |
Earnings / (loss) realized | 1,101 | 1,694 | 834
Ending Balance | 547 | 1,046 | 202
Reorganization |  |  |
Deep Value GP [Member] |  |  |
Schedule Of Investments In Equity Method Affiliates [Line Items] |  |  |
Beginning Balance | 21 | 269 | 97
Investments / advances |  |  |
Distributions / repayments |  | (4,597) | (5,904)
In-kind distribution |  |  |
Earnings / (loss) realized | (14) | 4,349 | 6,076
Ending Balance | 7 | 21 | 269
Reorganization |  |  |
Deep Value GP II [Member] |  |  |
Schedule Of Investments In Equity Method Affiliates [Line Items] |  |  |
Beginning Balance | 33 | 31 | 37
Investments / advances |  |  |
Distributions / repayments | (1,720) |  |
In-kind distribution |  |  |
Earnings / (loss) realized | 1,726 | 2 | (6)
Ending Balance | 39 | 33 | 31
Reorganization |  |  |
Star Asia SPV [Member] |  |  |
Schedule Of Investments In Equity Method Affiliates [Line Items] |  |  |
Beginning Balance | 466 | 1,604 |
Investments / advances | 10 | 6 | 4,500
Distributions / repayments | (662) | (1,846) | (3,104)
In-kind distribution |  |  | (55)
Earnings / (loss) realized | 1,581 | 702 | 263
Ending Balance | 1,395 | 466 | 1,604
Reorganization |  |  |
Star Asia Opportunity [Member] |  |  |
Schedule Of Investments In Equity Method Affiliates [Line Items] |  |  |
Beginning Balance | 4,460 |  |
Investments / advances |  | 4,055 |
Distributions / repayments | (4,982) |  |
In-kind distribution |  |  |
Earnings / (loss) realized | 544 | 405 |
Ending Balance | 22 | 4,460 |
Reorganization |  |  |
Star Asia Capital Management [Member] |  |  |
Schedule Of Investments In Equity Method Affiliates [Line Items] |  |  |
Beginning Balance | 50 |  |
Investments / advances | 6 | 6 |
Distributions / repayments | (652) |  |
In-kind distribution |  |  |
Earnings / (loss) realized | 504 | 44 |
Ending Balance | (92) | 50 |
Reorganization |  |  |
Star Asia Opportunity II [Member] |  |  |
Schedule Of Investments In Equity Method Affiliates [Line Items] |  |  |
Beginning Balance |  |  |
Investments / advances | 4,700 |  |
Distributions / repayments | (2,477) |  |
In-kind distribution |  |  |
Earnings / (loss) realized | (382) |  |
Ending Balance |  |  |
Reorganization | (1,841) |  |
SAA Manager [Member] |  |  |
Schedule Of Investments In Equity Method Affiliates [Line Items] |  |  |
Beginning Balance |  |  |
Investments / advances |  |  |
Distributions / repayments |  |  |
In-kind distribution |  |  |
Earnings / (loss) realized | (8) |  |
Ending Balance | (8) |  |
Reorganization |  |  |
Duart Capital and Other [Member] |  |  |
Schedule Of Investments In Equity Method Affiliates [Line Items] |  |  |
Beginning Balance |  |  |
Investments / advances |  | 964 | 1,283
Distributions / repayments |  |  |
In-kind distribution |  |  |
Earnings / (loss) realized |  | (964) | (1,283)
Ending Balance |  |  |
Reorganization |  |  |

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- Definition Investments in and advance to affiliates amount of equity. + References No definition available. + Details
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- Definition This item represents the entity's ownership percentage in the investee multiplied by the investee's total equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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