Deferred Charges and Other Non-Current Assets (Tables)
 3 Months Ended
Mar. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
Deferred charges and other non-current assets at December 31, 2015 and March 31, 2016 were as follows (in thousands):
 
December 31, 2015
 
March 31, 2106
Prepaid agreements not to compete, net of accumulated amortization of $5,404 and $5,507, respectively
$
1,912

 
$
1,892

Tradenames
8,856

 
8,856

Other
210

 
—

Deferred charges and other non-current assets
$
10,978

 
$
10,748