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Other Long-term Liabilities	12 Months Ended
Other Long-term Liabilities	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Other Long-term Liabilities	Other Long-term Liabilities At December 31, 2012, we had a long-term liability of $275,000 to Midland Development Corporation. The liability was fully satisfied during the quarter ended March 31, 2013. As a result of our performance under the agreement, a payment to Midland Development Corporation of $52,000 was made to settle the liability, resulting in a gain of $223,000, which is included in the other income line, in our statement of income for the year ended December 31, 2013. In addition, we entered into a purchase agreement with a vendor on July 30, 2008 pursuant to which we agreed to purchase up to $4.8 million of our paint and coating requirements exclusively from the vendor. In connection with the execution of the agreement, the vendor paid us a $300,000 fee which is considered to be a discount toward future purchases from the vendor. The $300,000 payment we received is recorded as a long-term liability and will decrease as the purchase commitment is fulfilled. The long-term liability remaining for the purchase commitment was $155,000 and $197,000 as of December 31, 2014 and 2013, respectively.