Related Party Transactions (Details)	9 Months Ended
Sep. 30, 2013 item
Related Party Transaction [Line Items]
Ownership percentage by parent in CAIJ (in hundredths)	80.00%
Ownership percentage by JIA in CAIJ (in hundredths)	20.00%
Number of specific Japanese funds	2
Variable Interest Entity, Primary Beneficiary [Member]
Related Party Transaction [Line Items]
Number of specific Japanese funds	2

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant