Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT Narrative (Details)

v3.4.0.3
LONG-TERM DEBT Narrative (Details) - USD ($)
3 Months Ended
Dec. 07, 2012
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Debt Instrument [Line Items]            
Gain on debt extinguishment   $ 0 $ 264,000      
Outstanding borrowings   273,158,000   $ 274,305,000    
Debt issuance cost   2,713,000   2,740,000    
7.750%Senior Notes | Senior Unsecured Notes Due December 15, 2022            
Debt Instrument [Line Items]            
Aggregate principal amount $ 200,000,000.0          
Stated interest rate 7.75%          
Proceeds from issuance of long-term debt $ 191,900,000          
Repurchase amount   0 9,900,000      
Gain on debt extinguishment     $ 300,000      
Senior secured revolving credit facility            
Debt Instrument [Line Items]            
Outstanding borrowings   90,000,000   90,000,000    
Promissory notes            
Debt Instrument [Line Items]            
Outstanding borrowings   24,414,000   $ 24,968,000    
Payments on other long-term debt   $ 600,000        
Senior secured revolving credit facility            
Debt Instrument [Line Items]            
Maximum borrowing amount           $ 300,000,000.0
Increase in commitments due to accordion feature           100,000,000.0
Commitment fee basis point   0.375%        
Remaining borrowing capacity   $ 208,900,000        
Letters of credit outstanding   $ 1,100,000        
Debt issuance cost         $ 2,400,000  
Senior secured revolving credit facility | Minimum            
Debt Instrument [Line Items]            
Commitment fee basis point   0.375%        
Senior secured revolving credit facility | Maximum            
Debt Instrument [Line Items]            
Commitment fee basis point   0.50%        
Senior secured revolving credit facility | Base Rate            
Debt Instrument [Line Items]            
Basis spread on variable rate   1.00%        
Senior secured revolving credit facility | Base Rate | Minimum            
Debt Instrument [Line Items]            
Basis spread on variable rate   0.75%        
Senior secured revolving credit facility | Base Rate | Maximum            
Debt Instrument [Line Items]            
Basis spread on variable rate   2.00%        
Senior secured revolving credit facility | London Interbank Offered Rate (LIBOR)            
Debt Instrument [Line Items]            
Basis spread on variable rate   2.00%        
Senior secured revolving credit facility | London Interbank Offered Rate (LIBOR) | Minimum            
Debt Instrument [Line Items]            
Basis spread on variable rate   1.75%        
Senior secured revolving credit facility | London Interbank Offered Rate (LIBOR) | Maximum            
Debt Instrument [Line Items]            
Basis spread on variable rate   3.00%        
Letter of Credit            
Debt Instrument [Line Items]            
Maximum borrowing amount           $ 50,000,000.0
Aeroleo | Loans Payable            
Debt Instrument [Line Items]            
Loan payment   $ (1,000,000)