XML 33 R21.htm IDEA: XBRL DOCUMENT v3.4.0.3
LONG-TERM DEBT (Details)
 3 Months Ended
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jun. 30, 2015
USD ($)
Sep. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2014
USD ($)
Mar. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Sep. 30, 2013
USD ($)
Jun. 30, 2013
USD ($)
Nov. 15, 2011
USD ($)
Long-term debt                          
Current portion of long-term debt $ 35,400,000 $ 40,900,000                      
Credit Facility                          
Long-term debt                          
Maximum borrowing capacity 47,000,000                       $ 100,000,000
Amount in which the maximum borrowing capacity was permanently reduced   15,000,000 $ 20,000,000                    
Reduction in maximum borrowing capacity each quarter 1,500,000 $ 1,500,000 $ 1,500,000 $ 1,500,000 $ 1,500,000 $ 1,500,000 $ 1,500,000 $ 1,500,000 $ 1,500,000 $ 1,500,000 $ 1,500,000 $ 1,500,000  
Multiple which may be used to permanently reduce the maximum borrowing capacity under the credit facility $ 50,000                        
Variable interest rate base LIBOR                        
Percentage points added to the reference rate 1.25%                        
One-month LIBOR interest rate (as a percent) 0.44%                        
Credit Facility | Actual                          
Long-term debt                          
Leverage ratio 0.7                        
Fixed charge coverage ratio 40.50                        
Credit Facility | Minimum                          
Long-term debt                          
Amount in which the maximum borrowing capacity was permanently reduced $ 500,000                        
Credit Facility | Minimum | Requirement                          
Long-term debt                          
Fixed charge coverage ratio 1.15                        
Credit Facility | Maximum | Requirement                          
Long-term debt                          
Leverage ratio 2.0                        
Old Credit Facility                          
Long-term debt                          
Maximum borrowing capacity                         $ 60,000,000