Subsequent Events (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended
Jan. 31, 2013
Subsequent Events [Abstract]
Number Of Senior Employees In Sold Business	4
Number Of Employees In Sold Business	36
Working Capital Sold	$ 6.5
Proceeds from Sale of Other Assets	15.7
Gain (Loss) on Sale of Business	$ 1.7

Cash received from sales of assets, other than those represented by other elements (securities, loans, mortgages, real estate).

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 27

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585

Name:	us-gaap_ProceedsFromSaleOfOtherAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration