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Deferred Charges and Other Non-Current Assets | 12 Months Ended
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Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Other Assets Disclosure | DEFERRED CHARGES AND OTHER NON-CURRENT ASSETS Deferred charges and other non-current assets at December 31, 2012 and 2013 were as follows (in thousands):
| December 31, 2012 |  | December 31, 2013
Prepaid agreements not to compete, net of accumulated amortization of $4,877 and $4,807, respectively | $ | 326 |  |  | $ | 1,299 |
Deferred loan costs, net of accumulated amortization of $199 and $1,252, respectively | 3,041 |  |  | 2,602 |
Deferred income tax asset | 2,220 |  |  | — |
Convertible junior subordinated debenture origination costs, net of accumulated amortization of $1,811 and $1,095, respectively | 2,232 |  |  | 2,949 |
Tradenames | 1,605 |  |  | 5,430 |
Deferred charges and other non-current assets | $ | 9,424 |  |  | $ | 12,280 |
Agreements not to compete are amortized over the term of the respective agreements, ranging generally from one to ten years. Amortization expense was $104,634, $98,849 and $79,207 for the years ended December 31, 2011, 2012 and 2013, respectively. Deferred loan costs are being amortized over the term of the related debt using the effective interest method. In April 2013, we wrote off approximately $0.4 million of unamortized deferred loan costs in connection with the Third Amendment to our Credit Facility. Our tradenames have indefinite lives and therefore are not amortized.

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- Definition The entire disclosure for other assets. This disclosure includes other current assets and other noncurrent assets. + References No definition available. + Details
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