XML 78 R65.htm IDEA: XBRL DOCUMENT v2.4.1.9
NOTES, MORTGAGE NOTES AND OBLIGATIONS PAYABLE - Fourth Quarter 2012 Debt Transaction (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Oct. 18, 2012
Apr. 26, 2011
Debt Instrument [Line Items]          
Net proceeds from the sale of the 8.5% Senior Notes due 2021 $ 0us-gaap_ProceedsFromUnsecuredNotesPayable $ 0us-gaap_ProceedsFromUnsecuredNotesPayable $ 251,700,000us-gaap_ProceedsFromUnsecuredNotesPayable    
Fees paid in connection with debt facilities 6,300,000us-gaap_PaymentsOfDebtIssuanceCosts 0us-gaap_PaymentsOfDebtIssuanceCosts 5,900,000us-gaap_PaymentsOfDebtIssuanceCosts    
Loss from debt retirement 2,300,000us-gaap_GainsLossesOnExtinguishmentOfDebt 0us-gaap_GainsLossesOnExtinguishmentOfDebt 6,400,000us-gaap_GainsLossesOnExtinguishmentOfDebt    
Debt premium 4,800,000us-gaap_DebtInstrumentUnamortizedPremium 4,500,000us-gaap_DebtInstrumentUnamortizedPremium      
Senior Notes [Member] | 8.5% Notes [Member]          
Debt Instrument [Line Items]          
Debt face amount         500,000,000.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorNotesDue202185PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
Interest rate 8.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorNotesDue202185PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
  8.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorNotesDue202185PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
8.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorNotesDue202185PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Senior Notes [Member] | New 8.5% Notes [Member]          
Debt Instrument [Line Items]          
Net proceeds from the sale of the 8.5% Senior Notes due 2021       251,700,000us-gaap_ProceedsFromUnsecuredNotesPayable
/ us-gaap_DebtInstrumentAxis
= ntks_NewSeniorNotesDue202185PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Fees paid in connection with debt facilities       4,700,000us-gaap_PaymentsOfDebtIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= ntks_NewSeniorNotesDue202185PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt premium       15,100,000us-gaap_DebtInstrumentUnamortizedPremium
/ us-gaap_DebtInstrumentAxis
= ntks_NewSeniorNotesDue202185PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Senior Notes [Member] | Original 8.5% Notes [Member]          
Debt Instrument [Line Items]          
Debt face amount       235,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= ntks_OriginalSeniorNotesDue202185PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Loans Payable [Member] | Term Loan Facility [Member]          
Debt Instrument [Line Items]          
Payments of accrued interest       1,800,000ntks_PaymentsOfAccruedInterestOnDebtExtinguished
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorSecuredTermLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember
 
Loss from debt retirement       6,400,000us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorSecuredTermLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember
 
Deferred finance costs       $ 3,900,000us-gaap_DeferredFinanceCostsNet
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorSecuredTermLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember