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Note 9 - Senior Notes, Credit Facilities, and Capital Leases (Tables)
9 Months Ended
Sep. 30, 2014
Debt Disclosure [Abstract]  
Schedule of Line of Credit Facilities [Table Text Block]

Interest rates:

       

Spread over the London Interbank Offer Rate

  2.25 - 3.25%

Spread over alternative base rate

  1.25 - 2.25%

Standby fee per annum on undrawn amounts

    0.50%  

Covenant financial ratios:

       

Senior leverage ratio (debt secured by liens/EBITDA)

   

not more than 2.50:1

 

Leverage ratio (total debt less unencumbered cash/EBITDA)

    not more than 4.00:1  

Interest coverage ratio (EBITDA/interest expense)

    not more than 3.00:1  
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]
Twelve-month period ending September 30,        
2015   $ 9,111  
2016     6,924  
2017     3,348  
2018     807  
Total     20,190  
Less: imputed interest     (828

)

Net capital lease obligation   $ 19,362