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Commitments and Contingencies - Additional Information (Detail) In Thousands, unless otherwise specified	9 Months Ended			9 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 Subordinate loans [Member] USD ($)	Sep. 30, 2014 KBCD Partnership [Member] USD ($)	Sep. 30, 2014 KBCD Partnership [Member] EUR (€)	Sep. 30, 2013 Commitment to Invest in KBCD [Member] USD ($)	Sep. 30, 2013 Commitment to Invest in KBCD [Member] EUR (€)
Schedule of Equity Method Investments [Line Items]
Commitment to invest						$ 50,000	€ 38,000
Ownership interest				21.00%	21.00%
Initial funding for equity method investment	39,477	0		39,477	30,724
Unfunded loan commitments			$ 104,600

X

- Definition

Mortgage Loans on Real Estate, Commitment to Lend, Unfunded Amount

+ References

No definition available.

+ Details

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X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ 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)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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X

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

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X

- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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