Reconciliation of Activity Related to Redeemable Noncontrolling Interest (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013
Reconciliation activity related to the redeemable non controlling interest
Beginning Balance	$ 3,442
Impact of subsidiary equity transactions	98	2,793
Ending Balance	5,383
Redeemable Noncontrolling Interest
Reconciliation activity related to the redeemable non controlling interest
Beginning Balance	3,442	3,383
Redeemable noncontrolling interest portion of subsidiary net income/(loss)	(8)	(102)
Accretion to estimated redemption value	1,940	570
Impact of subsidiary equity transactions	9
Ending Balance	$ 5,383	$ 3,851

Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.27(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant