Fair Value Measurements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2013
Disclosure Fair Value Measurements Additional Information Detail [Line Items]
Pre-tax losses from accumulated other comprehensive loss to interest expense expected to be recognized in next twelve months	$ 12

Pre tax losses from accumulated other comprehensive loss expected to be recognized in the next twelve months.

No definition available.

Name:	ncbv_PretaxLossesFromAccumulatedOtherComprehensiveLossExpectedToBeRecognizedInNextTwelveMonths
Namespace Prefix:	ncbv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration