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Commitments and Contingencies - Additional Information (Detail) (USD $) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 Trilantic [Member] | Sep. 30, 2013 First Republic Bank [Member] | Jun. 27, 2013 First Republic Bank [Member]
Commitment And Contingencies [Line Items] |  |  |  |  |  |  |
Operating Leases agreements, expiration date |  |  | Various dates through 2023 |  |  |  |
Rental expense relating to operating leases | $ 5,926,000 | $ 5,992,000 | $ 17,787,000 | $ 17,339,000 |  |  |
Unfunded commitments for capital contributions | 10,224,000 |  | 10,224,000 |  | 4,487,000 |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  | 25,000,000
Line of credit facility, amount outstanding |  |  |  |  |  | $ 0 |

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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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