DEFERRED CHARGES AND OTHER NON-CURRENT ASSETS

Deferred charges and other non-current assets at December 31, 2013 and June 30, 2014 were as follows (in thousands):



	December 31, 2013		June 30, 2014
Prepaid agreements not-to-compete, net of accumulated amortization of $4,807 and $5,016, respectively	$	1,299	$	1,140
Deferred loan costs, net of accumulated amortization of $1,252 and $2,594, respectively	2,602		2,057
Convertible junior subordinated debenture origination costs, net of accumulated amortization of $1,095	2,949		—
Convertible subordinated notes issuance costs, net of accumulated amortization of $138	—		3,489
Tradenames	5,430		11,619
Other	—		352
Deferred charges and other non-current assets	$	12,280	$	18,657

Prepaid agreements not-to-compete are amortized over the term of the respective agreements, ranging generally from one to ten years. Amortization expense was $16,800 and $69,000 for the three months ended June 30, 2013 and 2014, respectively, and $40,000 and $209,000 for the six months ended June 30, 2013 and 2014, respectively. Deferred loan costs are being amortized over the term of the related debt using the effective interest method. In connection with the redemption of our convertible junior subordinated debentures, we wrote-off the related unamortized origination costs of approximately $2.9 million in March 2014. See Note 15 to the Consolidated Financial Statements herein for further discussion related to the convertible junior subordinated debentures. Debt issuance costs related to our convertible subordinated notes issued in March 2014 are being amortized using the effective interest method over the seven year term of the notes. See Note 14 to the Consolidated Financial Statements herein for further discussion related to our convertible subordinated notes. Our tradenames have indefinite lives and therefore are not amortized.