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Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets |
| December 31, 2012 |  | September 30, 2013
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Amount
| (in thousands)
Finite-lived |  |  |  |  |  |  |  |  |  |  |
Supply agreements | $ | 29,803 |  |  | $ | 8,674 |  |  | $ | 21,129 |  |  | $ | 31,200 |  |  | $ | 10,944 |  |  | $ | 20,256 |
Favorable leasehold arrangements, net | 236 |  |  | 39 |  |  | 197 |  |  | 236 |  |  | 48 |  |  | 188 |
Loan origination costs | 1,907 |  |  | 102 |  |  | 1,805 |  |  | 1,907 |  |  | 388 |  |  | 1,519 |
Other intangibles | 63 |  |  | 63 |  |  | — |  |  | 389 |  |  | 8 |  |  | 381 |
Intangible assets, net | $ | 32,009 |  |  | $ | 8,878 |  |  | $ | 23,131 |  |  | $ | 33,732 |  |  | $ | 11,388 |  |  | $ | 22,344 |

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