Stockholder's Equity (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	1 Months Ended
Dec. 31, 2010	Oct. 02, 2010
Stockholder's Equity
Receivable cash consideration per share under converted rights (in dollars per share)		$ 55.00
Percentage of issued and outstanding common stock owned by Holdings		100.00%
Additional capital contribution made by Holdings	$ 400

Represents the amount receivable per share of common stock under the converted rights in a business combination.

No definition available.

Name:	nty_BusinessCombinationsAmountReceivablePerShareOfCommonStockUnderConvertedRights
Namespace Prefix:	nty_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant