Net Revenues and Identifiable Assets of Company (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Geographic Area Information [Line Items]
Net third party revenue	$ 128,396	$ 163,251
Long-lived assets	36,189	74,741
UNITED STATES
Geographic Area Information [Line Items]
Net third party revenue	128,396	163,251
Long-lived assets	23,458	67,127
Foreign
Geographic Area Information [Line Items]
Long-lived assets	$ 12,731	$ 7,614

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph b(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Name:	us-gaap_NoncurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant