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Financing Arrangements - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Nov. 30, 2016
Sep. 30, 2016
Jun. 30, 2015
Jun. 30, 2015
Jun. 30, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]                  
Debt retirement costs             $ 1,896,000    
Loss on extinguishment of debt             $ 0 $ 15,528,000 $ 0
Accrued interest paid up to redemption date $ 3,300,000                
Consolidated fixed charge coverage ratio to be maintained             100.00%    
Deposits to be made in case of default equaling, percentage of greatest amount of letter of credit drawn             105.00%    
Debt issuance costs             $ 11,000 6,304,000 $ 175,000
LMI [Member]                  
Debt Instrument [Line Items]                  
Debt issuance costs       $ 5,900,000          
Fees and expenses incurred in connection with amendment               $ 400,000  
Seven Year Term Facility [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, face amount $ 365,000,000     $ 365,000,000 $ 365,000,000 $ 365,000,000      
Debt instrument discount percentage 1.25%     1.25% 1.25% 1.25%      
Debt instrument discount amount $ 4,600,000     $ 4,600,000 $ 4,600,000 $ 4,600,000      
Increase in aggregate amount 37,500,000     37,500,000 37,500,000 37,500,000      
Description of variable rate basis             The term loans under the Term Facility bear interest, with pricing based from time to time at LMI's election at (i) LIBOR plus a spread of 6.00% (with a LIBOR rate floor of 1.00%) or (ii) the Base Rate (as defined in the Term Facility Agreement) plus a spread of 5.00%.    
Interest rate at end of period             7.00%    
Prepayment terms             LMI is permitted to voluntarily prepay the Term Facility, in whole or in part, with a premium applicable for the first six months of the Term Facility in connection with a repricing transaction.    
Percentage of principal amount required to be paid quarterly             (0.25%)    
Maturity date of term facility             Jun. 30, 2022    
Percentage of net cash proceeds of related to sales outside the ordinary course of business or other dispositions of assets             100.00%    
Percentage of net cash proceeds from issuances or incurrence of debt             100.00%    
Percentage of excess cash flow             50.00%    
Voluntary prepayment amount   $ 75,000,000 $ 75,000,000            
Amount of cash in hand for voluntary prepayment of debt   26,200,000 26,200,000            
Proceeds from follow on offering, net   48,800,000 $ 48,800,000            
Seven Year Term Facility [Member] | Second Voluntary Prepayment [Member]                  
Debt Instrument [Line Items]                  
Debt retirement costs   $ 1,900,000              
Seven Year Term Facility [Member] | Zurich Insurance Settlement [Member]                  
Debt Instrument [Line Items]                  
Percentage of net payments from insurance settlement             50.00%    
Seven Year Term Facility [Member] | Interest Rate Floor [Member]                  
Debt Instrument [Line Items]                  
Basis spread on variable rate (as a percent)             5.00%    
Revolving Line of Credit [Member]                  
Debt Instrument [Line Items]                  
Unfunded standby letter of credit outstanding             $ 8,800,000    
Letter of credit, expiration date             Feb. 28, 2017    
Renewal period of unfunded standby letter of credit             1 year    
Period required for non renewal notification of debt instrument             60 days    
Unfunded standby letter of credit payment term             The unfunded Standby Letter of Credit requires an annual fee, payable quarterly, which is set at LIBOR plus a spread of 2.00% and expired during February 2017.    
Borrowing base             $ 44,600,000    
Available borrowing capacity             35,700,000    
Accrued interest             100,000    
Debt instrument covenant, excess availability threshold for more than specified period of time             $ 7,500,000    
Percentage threshold of borrowing base to be maintained             15.00%    
Amount of excess availability             $ 5,000,000    
Revolving Line of Credit [Member] | LMI [Member]                  
Debt Instrument [Line Items]                  
Increase in aggregate amount             $ 50,000,000    
Description of variable rate basis             The loans under the Revolving Facility bear interest subject to a pricing grid based on average historical excess availability, with pricing based from time to time at the election of LMI at (i) LIBOR plus a spread ranging from 2.00% or (ii) the Reference Rate (as defined in the agreement) plus 1.00%. The Revolving Facility also includes an unused line fee of 0.375% and expires on June 30, 2020.    
Unused line of credit fee (as a percent)             0.375%    
Senior Notes [Member]                  
Debt Instrument [Line Items]                  
Maturity date of term facility             Jun. 30, 2015    
Aggregate principal amount outstanding 400,000,000     400,000,000 400,000,000 400,000,000 $ 400,000,000    
Notes interest rate             9.75%    
Notes payment term, description             The interest on the Notes was at a rate of 9.750% per year, payable on May 15 and November 15 of each year.    
Loss on extinguishment of debt         15,500,000 15,500,000      
Redemption premium           9,700,000      
Unamortized debt issuance costs $ 5,800,000     $ 5,800,000 5,800,000 $ 5,800,000      
Accrued interest paid up to redemption date         $ 3,300,000        
LIBOR [Member] | Seven Year Term Facility [Member]                  
Debt Instrument [Line Items]                  
Basis spread on variable rate (as a percent)             6.00%    
LIBOR [Member] | Revolving Line of Credit [Member]                  
Debt Instrument [Line Items]                  
Basis spread on variable rate (as a percent)             2.00%    
LIBOR [Member] | Revolving Line of Credit [Member] | LMI [Member]                  
Debt Instrument [Line Items]                  
Basis spread on variable rate (as a percent)             2.00%    
Reference Rate [Member] | Seven Year Term Facility [Member]                  
Debt Instrument [Line Items]                  
Basis spread on variable rate (as a percent)             1.00%    
Reference Rate [Member] | Revolving Line of Credit [Member] | LMI [Member]                  
Debt Instrument [Line Items]                  
Basis spread on variable rate (as a percent)             1.00%