XML 13 R25.htm IDEA: XBRL DOCUMENT v3.3.0.814
Schedule of Outstanding Debt (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Secured long-term debt $ 106,619 $ 92,079
Less current portion (25,929) (19,619)
Total long-term debt 80,690 72,460
Secured Equipment Notes due in September 2020 [Member]    
Debt Instrument [Line Items]    
Equipment note 12,828  
Secured Equipment Notes due in June 2020 [Member]    
Debt Instrument [Line Items]    
Equipment note 6,733  
Secured Equipment Notes due in March 2020 [Member]    
Debt Instrument [Line Items]    
Equipment note 2,110  
Secured Equipment Notes due in January 2020 [Member]    
Debt Instrument [Line Items]    
Equipment note 7,975  
Secured Equipment Notes due in December 2019 [Member]    
Debt Instrument [Line Items]    
Equipment note 11,473 13,387
Secured Equipment Notes due in November 2019 [Member]    
Debt Instrument [Line Items]    
Equipment note 23,891 28,429
Secured Equipment Notes due in September 2019 [Member]    
Debt Instrument [Line Items]    
Equipment note 19,330 22,772
Secured Equipment Notes due in February 2019 [Member]    
Debt Instrument [Line Items]    
Equipment note 17,218 21,016
Secured Equipment Notes due in June 2018 [Member]    
Debt Instrument [Line Items]    
Equipment note $ 5,061 $ 6,475