XML 103 R60.htm IDEA: XBRL DOCUMENT v2.4.1.9
NOTES, MORTGAGE NOTES AND OBLIGATIONS PAYABLE - Second Quarter 2014 Debt Transactions (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Apr. 30, 2014
Debt Instrument [Line Items]        
Deferred debt expense $ 17,300,000us-gaap_UnamortizedDebtIssuanceExpense $ 16,300,000us-gaap_UnamortizedDebtIssuanceExpense    
Loss from debt retirement 2,300,000us-gaap_GainsLossesOnExtinguishmentOfDebt 0us-gaap_GainsLossesOnExtinguishmentOfDebt 6,400,000us-gaap_GainsLossesOnExtinguishmentOfDebt  
Loans Payable [Member] | Senior Secured Term Loan Due 2020 [Member]        
Debt Instrument [Line Items]        
Debt face amount       350,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorSecuredTermLoanDue2020Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember
Outstanding borrowings       93,000,000us-gaap_LineOfCreditFacilityAmountOutstanding
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorSecuredTermLoanDue2020Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember
Debt Issuance Cost       6,300,000us-gaap_DebtIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorSecuredTermLoanDue2020Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember
Deferred debt expense       4,600,000us-gaap_UnamortizedDebtIssuanceExpense
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorSecuredTermLoanDue2020Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember
Loss from debt retirement $ 2,300,000us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_DebtInstrumentAxis
= ntks_SeniorSecuredTermLoanDue2020Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember