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Notes Payable and Borrowings under Capital Leases - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2015
May. 31, 2014
Mar. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Jul. 31, 2014
Debt Instrument [Line Items]                
Interest and debt expense       $ 4,764,000 $ 8,860,000 $ 9,968,000 $ 30,712,000  
Minimum                
Debt Instrument [Line Items]                
Debt instrument covenant interest coverage ratio       350.00%   350.00%    
Maximum                
Debt Instrument [Line Items]                
Debt instrument covenant leverage ratio       450.00%   450.00%    
Second Lien Credit Facility                
Debt Instrument [Line Items]                
Repayments of lines of credit     $ 190,000,000          
Penalty paid     3,800,000          
First Lien Credit Facility                
Debt Instrument [Line Items]                
Repayments of lines of credit   $ 25,000,000 25,000,000          
Lien of credit amount amortized   $ 500,000 $ 5,000,000     $ 6,100,000    
Unused portion of the revolving credit facility       $ 59,500,000   59,500,000    
Debt issuance costs           11,100,000    
Deferred financing costs       $ 8,000,000   8,000,000    
Interest and debt expense           3,100,000    
Gains (losses) on extinguishment of debt           $ 9,000,000    
First Lien Credit Facility | Tranche A Term Loans                
Debt Instrument [Line Items]                
Line of credit facility               $ 375,000,000
Credit facility, maturity date           Jul. 09, 2019    
Increase (decrease) in interest rate           0.25%    
First Lien Credit Facility | Tranche A Term Loans | Installment Period 1                
Debt Instrument [Line Items]                
Frequency of payment           Quarterly    
Beginning date of payment           Dec. 31, 2014    
Ending date of payment           Dec. 31, 2016    
Percentage of principal amount to be paid           5.00%    
First Lien Credit Facility | Tranche A Term Loans | Installment Period 2                
Debt Instrument [Line Items]                
Frequency of payment           Quarterly    
Beginning date of payment           Dec. 31, 2016    
Ending date of payment           Dec. 31, 2018    
Percentage of principal amount to be paid           7.50%    
First Lien Credit Facility | Tranche A Term Loans | Installment Period 3                
Debt Instrument [Line Items]                
Frequency of payment           Quarterly    
Beginning date of payment           Dec. 31, 2018    
Ending date of payment           Jun. 30, 2019    
Percentage of principal amount to be paid           10.00%    
First Lien Credit Facility | Tranche A Term Loans | Minimum                
Debt Instrument [Line Items]                
Increase (decrease) in interest rate           (0.25%)    
First Lien Credit Facility | Tranche A Term Loans | Maximum                
Debt Instrument [Line Items]                
Increase (decrease) in interest rate           (0.50%)    
First Lien Credit Facility | Tranche A Term Loans | LIBOR                
Debt Instrument [Line Items]                
Margin for term loans           2.75%    
First Lien Credit Facility | Tranche A Term Loans | Prime Lending Rate                
Debt Instrument [Line Items]                
Margin for term loans           1.75%    
First Lien Credit Facility | Tranche B Term Loans                
Debt Instrument [Line Items]                
Repayments of lines of credit $ 25,000,000              
Lien of credit amount amortized $ 400,000              
Line of credit facility               200,000,000
Credit facility, maturity date           Jul. 09, 2017    
Commitment fee percentage           0.50%    
Percentage of prepayment in excess cash flow           50.00%    
Frequency of payment           Quarterly    
Percentage of principal amount to be paid           1.00%    
First Lien Credit Facility | Tranche B Term Loans | Prepayment Condition 1                
Debt Instrument [Line Items]                
Percentage of prepayment in excess cash flow           25.00%    
First Lien Credit Facility | Tranche B Term Loans | Prepayment Condition 2                
Debt Instrument [Line Items]                
Percentage of prepayment in excess cash flow           0.00%    
First Lien Credit Facility | Tranche B Term Loans | Minimum                
Debt Instrument [Line Items]                
Commitment fee percentage           0.375%    
First Lien Credit Facility | Tranche B Term Loans | Minimum | Prepayment Condition 1                
Debt Instrument [Line Items]                
Debt instrument covenant leverage ratio       300.00%   300.00%    
First Lien Credit Facility | Tranche B Term Loans | Maximum                
Debt Instrument [Line Items]                
Working capital       $ 10,000,000   $ 10,000,000    
First Lien Credit Facility | Tranche B Term Loans | Maximum | Prepayment Condition 1                
Debt Instrument [Line Items]                
Debt instrument covenant leverage ratio       375.00%   375.00%    
First Lien Credit Facility | Tranche B Term Loans | Maximum | Prepayment Condition 2                
Debt Instrument [Line Items]                
Debt instrument covenant leverage ratio       300.00%   300.00%    
First Lien Credit Facility | Tranche B Term Loans | LIBOR                
Debt Instrument [Line Items]                
Margin for term loans           2.75%    
First Lien Credit Facility | Tranche B Term Loans | Prime Lending Rate                
Debt Instrument [Line Items]                
Margin for term loans           1.75%    
First Lien Credit Facility | Revolving Credit Facility                
Debt Instrument [Line Items]                
Line of credit facility               $ 75,000,000
Credit facility, maturity date           Jul. 09, 2019    
First Lien Credit Facility | Letter of Credit                
Debt Instrument [Line Items]                
Line of credit facility       $ 30,000,000   $ 30,000,000    
First Lien Credit Facility | Swingline                
Debt Instrument [Line Items]                
Line of credit facility       $ 10,000,000   $ 10,000,000