Cash on hand used to pay cash requirements including transaction fees, expenses and dividends.

No definition available.

Name:	nty_CashOnHandUsedToPayTransactionFeesExpensesDividend
Namespace Prefix:	nty_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the applicable amount for interest period which is expressed as percentage of the aggregate amount of cash interest.

+ References

No definition available.

+ Details

Name:	nty_DebtInstrumentApplicableAmountForInterestPeriodAsPercentageOfAggregateAmountOfCashInterest
Namespace Prefix:	nty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the call premium cost in connection with early extinguishment of debt.

+ References

No definition available.

+ Details

Name:	nty_DebtInstrumentCallPremiumCost
Namespace Prefix:	nty_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the percentage of outstanding principal amount in which interest is payable by increasing the principal amount of outstanding notes or by issuing PIK Notes equal to such interest.

+ References

No definition available.

+ Details

Name:	nty_DebtInstrumentPercentageOfOutstandingPrincipalAmountInWhichInterestIsPayableByIncreasingPrincipalAmountOrIssuingPIKNotes
Namespace Prefix:	nty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of outstanding principal amount in which interest is payable in cash.

+ References

No definition available.

+ Details

Name:	nty_DebtInstrumentPercentageOfOutstandingPrincipalAmountInWhichInterestIsPayableInCash
Namespace Prefix:	nty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of outstanding principal amount in which interest is payable in kind.

+ References

No definition available.

+ Details

Name:	nty_DebtInstrumentPercentageOfOutstandingPrincipalAmountInWhichInterestIsPayableInKind
Namespace Prefix:	nty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the rate of interest on a debt instrument which is payable in cash.

+ References

No definition available.

+ Details

Name:	nty_DebtInstrumentRateOfInterestPayableInCash
Namespace Prefix:	nty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the rate of interest on a debt instrument which is payable in kind.

+ References

No definition available.

+ Details

Name:	nty_DebtInstrumentRateOfInterestPayableInKind
Namespace Prefix:	nty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the redemption price of the debt instrument as a percentage of the principal amount plus accrued interest, unpaid interest and additional interest.

+ References

No definition available.

+ Details

Name:	nty_DebtInstrumentRedemptionPriceAsPercentageOfPrincipalAmount
Namespace Prefix:	nty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the step down percentage upon achievement of a total senior secured leverage ratio as set forth in the senior secured credit facilities.

+ References

No definition available.

+ Details

Name:	nty_DebtInstrumentStepDownPercentageUponAchievementOfSeniorSecuredLeverageRatio
Namespace Prefix:	nty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the portion of capitalized financing costs attributable to call premium.

+ References

No definition available.

+ Details

Name:	nty_DeferredFinanceCostsPortionAttributableToCallPremium
Namespace Prefix:	nty_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the percentage of fronting fee per annum applicable on the daily amount of each letter of credit available to be drawn.

+ References

No definition available.

+ Details

Name:	nty_LineOfCreditFacilityFrontingFeePercentage
Namespace Prefix:	nty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the effect of a change in accounting principle on long-term debt.

+ References

No definition available.

+ Details

Name:	nty_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnLongTermDebt
Namespace Prefix:	nty_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of the effect of a change in accounting principle on other current assets.

+ References

No definition available.

+ Details

Name:	nty_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnOtherAssetsCurrent
Namespace Prefix:	nty_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of the effect of a change in accounting principle on other non-current assets.

+ References

No definition available.

+ Details

Name:	nty_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnOtherAssetsNoncurrent
Namespace Prefix:	nty_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the percentage portion of excess cash flow (as defined) due as part of additional prepayments on loans.

+ References

No definition available.

+ Details

Name:	nty_PortionOfExcessCashFlowAsDefinedDueAsAdditionalPrepaymentsOnLoan
Namespace Prefix:	nty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

+ Details

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

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

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

- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(b))

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

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

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

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

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

- Definition

The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

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

- Definition

For an unclassified balance sheet, the amount as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Such amount is before the consideration of accumulated amortization.

+ References

+ Details

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

- Definition

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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 210.5-02.19(b),22(b))

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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 210.5-02.19,20)

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Article 5

+ Details

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

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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 210.5-02.22)

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

+ Details

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

- Details

Name:	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleRetrospectiveAdjustmentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfDividendsCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

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

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

- Details

Name:	dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AdjustmentsForNewAccountingPrincipleEarlyAdoptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=nty_OtherLongTermDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=nty_TermLoanB1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=nty_TermLoanB2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended	1 Months Ended		6 Months Ended	3 Months Ended	0 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Oct. 31, 2012	Mar. 31, 2015	Dec. 31, 2014	Nov. 20, 2014	Dec. 12, 2013	Mar. 21, 2013	Oct. 17, 2012	Oct. 01, 2010
Long-Term Debt
Total Long-term Debt	$ 2,099,748us-gaap_LongTermDebt			2,107,931us-gaap_LongTermDebt
Less: current portion	(261)us-gaap_LongTermDebtCurrent			(174)us-gaap_LongTermDebtCurrent
Long-term debt, net of current portion	2,099,487us-gaap_LongTermDebtNoncurrent			2,107,757us-gaap_LongTermDebtNoncurrent
Adjustment made due to new guidance
Adjustments
Long-term debt	(58,600)
Other assets	(41,285)
Other current assets	(17,315)
Parent Company
Long-Term Debt
Consent fee		18,560							17,345
Dividend paid		445,537	721,682
Term loan B-2
Long-Term Debt
Principal amount	1,507,500			1,507,500
Net unamortized premium (discount) on Holdco Notes	(45,539)			(38,375)
Total Long-term Debt	1,461,961			1,469,125
Face amount of debt								1,507,500
Portion of excess cash flow (as defined) as part of additional prepayments on term loan (as a percent)				50.00%
Term loan B-2 \| Eurodollar (LIBOR)
Long-Term Debt
Floor for reference rate (as a percent)				1.00%
Margin rate over reference rate (as a percent)				2.50%
Term loan B-2 \| Base rate
Long-Term Debt
Floor for reference rate (as a percent)				2.00%
Margin rate over reference rate (as a percent)				1.50%
Notes
Long-Term Debt
Principal amount	650,000			650,000
Net unamortized premium (discount) on Holdco Notes	(13,061)			(11,684)
Total Long-term Debt	636,939			638,316
Face amount of debt										650,000
Interest rate on debt instrument (as a percent)										9.00%
Notes \| On or after October 1, 2014
Long-Term Debt
Redemption price as a percentage of principal amount					104.50%
Notes \| On or after October 1, 2015
Long-Term Debt
Redemption price as a percentage of principal amount					102.25%
Notes \| On and after October 1, 2016 and thereafter
Long-Term Debt
Redemption price as a percentage of principal amount					100.00%
Other
Long-Term Debt
Total Long-term Debt	848			490
Revolving credit facility
Long-Term Debt
Borrowing capacity	200,000			175,000		175,000
Outstanding balance				0
Letters of credit				4,400
Net availability				170,600
Step down percentage upon achievement of a total senior secured leverage ratio (as a percent)				0.25%
Write off deferred financing cost						359
Financing costs capitalized						611
Unused line fee percentage				0.50%
Fronting fee Percentage				0.25%
Revolving credit facility \| Eurodollar (LIBOR)
Long-Term Debt
Margin rate over reference rate (as a percent)				3.25%
Revolving credit facility \| Base rate
Long-Term Debt
Margin rate over reference rate (as a percent)				2.25%
Holdco Notes
Long-Term Debt
Face amount of debt									550,000
Holdco Notes \| Parent Company
Long-Term Debt
Face amount of debt							450,000		550,000
Cash interest rate (as a percent)									7.75%
PIK interest (as a percent)									8.50%
Cash on hand from Company used to pay transaction fees and expenses and a dividend									200,000
Gross proceeds from issuance of debt							460,125
Premium on issuance of debt							10,125
Holdco Notes \| Parent Company \| Equal or exceed 75%, but less than 100%
Long-Term Debt
Percentage of outstanding principal amount in which interest is payable by increasing the principal amount of outstanding notes or by issuing PIK Notes equal to such interest				25.00%
Percentage of outstanding principal amount in which interest is payable in cash				75.00%
Holdco Notes \| Parent Company \| Equal or exceed 50%, but less than 75%
Long-Term Debt
Percentage of outstanding principal amount in which interest is payable in kind				50.00%
Percentage of outstanding principal amount in which interest is payable in cash				50.00%
Holdco Notes \| Parent Company \| Equal or exceed 25%, but less than 50%
Long-Term Debt
Percentage of outstanding principal amount in which interest is payable in kind				75.00%
Percentage of outstanding principal amount in which interest is payable in cash				25.00%
Holdco Notes \| Minimum \| Parent Company \| Equal or exceed 75%, but less than 100%
Long-Term Debt
Applicable amount for interest period expressed as a percentage of the aggregate amount of cash interest				75.00%
Holdco Notes \| Minimum \| Parent Company \| Equal or exceed 50%, but less than 75%
Long-Term Debt
Applicable amount for interest period expressed as a percentage of the aggregate amount of cash interest				50.00%
Holdco Notes \| Minimum \| Parent Company \| Equal or exceed 25%, but less than 50%
Long-Term Debt
Applicable amount for interest period expressed as a percentage of the aggregate amount of cash interest				25.00%
Holdco Notes \| Maximum \| Parent Company \| Equal or exceed 75%, but less than 100%
Long-Term Debt
Applicable amount for interest period expressed as a percentage of the aggregate amount of cash interest				100.00%
Holdco Notes \| Maximum \| Parent Company \| Equal or exceed 50%, but less than 75%
Long-Term Debt
Applicable amount for interest period expressed as a percentage of the aggregate amount of cash interest				75.00%
Holdco Notes \| Maximum \| Parent Company \| Equal or exceed 25%, but less than 50%
Long-Term Debt
Applicable amount for interest period expressed as a percentage of the aggregate amount of cash interest				50.00%
Holdco Notes \| Maximum \| Parent Company \| Less than 25%
Long-Term Debt
Applicable amount for interest period expressed as a percentage of the aggregate amount of cash interest				25.00%
Holdco Notes \| On or after November 1, 2014 \| Holdings
Long-Term Debt
Redemption price as a percentage of principal amount				102.00%
Holdco Notes \| On or after November 1, 2015 \| Holdings
Long-Term Debt
Redemption price as a percentage of principal amount				101.00%
Holdco Notes \| On or after November 1, 2016 and thereafter \| Holdings
Long-Term Debt
Redemption price as a percentage of principal amount				100.00%
Term loan B-1
Long-Term Debt
Face amount of debt repurchased								1,750,000
Write off deferred financing cost								4,232
Call premium on term loan								1,151
Financing costs capitalized								15,190
Remaining portion of the call premium capitalized								$ 13,924