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Debt and Leases - Leases (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 1 Months Ended
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Warehouse and distribution center acre | Aug. 31, 2005 Core Composites Cincinnati, LLC Manufacturing facility | Aug. 31, 2011 Core Specialty Composites, LLC Manufacturing facility
Leases: |  |  |  |  |
Operating lease duration |  |  | 5 years | 7 years | 3 years
Number of acres leased |  |  | 2 |  |
Rental expense | $ 994 | $ 678 |  |  |
Future minimum operating lease payments: |  |  |  |  |
2013 | 256 |  |  |  |
2014 | 213 |  |  |  |
2015 | 139 |  |  |  |
2016 | 139 |  |  |  |
2017 | 115 |  |  |  |
Total minimum lease payments | $ 862 |  |  |  |

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