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Commitments and Contingencies - Additional Information (Detail) In Thousands, unless otherwise specified					9 Months Ended
	Sep. 30, 2013 Condominium conversion loan [Member] USD ($)	Sep. 30, 2013 Condominium construction loan [Member] USD ($)	Sep. 30, 2013 KBCD Partnership [Member] USD ($)	Sep. 30, 2013 KBCD Partnership [Member] EUR (€)	Sep. 30, 2013 KBCD [Member]
Contingencies And Commitments [Line Items]
Maximum limited partnership investment			$ 50,000	€ 38,000
Indirect ownership interest from limited partnership					21.00%
Unfunded loan commitments	$ 34,650	$ 29,106

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Indirect Ownership Interest From Limited Partnership

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Maximum Limited Partnership Investment

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Unfunded Loan Commitments

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