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Commitments and Contingencies | 3 Months Ended
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Mar. 31, 2017
Commitments And Contingencies Disclosure [Abstract] |
Commitments and Contingencies | 20. Commitments and Contingencies Leases The Company is obligated under certain operating leases and rental agreements for rail cars, office space, and other equipment. Future minimum annual commitments under such operating leases at March 31, 2017 are as follows:
2018 |  | $ | 8,087 |
2019 |  |  | 6,927 |
2020 |  |  | 5,440 |
2021 |  |  | 3,129 |
2022 |  |  | 1,436 |
Thereafter |  |  | 285 |
Expense related to operating leases and rental agreements was $1,975 and $1,805 for the three months ended March 31, 2017 and 2016, respectively. Lease expense related to rail cars are included in cost of goods sold in the consolidated income statements. Litigation The Company is periodically involved in litigation and claims incidental to its operation. Management believes that any pending litigation will not have a material impact the Company’s financial position. Employment Agreements Certain of the Company’s executives are employed under employment agreements, the terms of which provide for, among other things, a base salary plus additional compensation including an annual bonus based on the percentage as defined and agreed upon by the Board based on service and/or performance in a given calendar year. The agreements, which contain one-year automatic renewals, provide for benefits that are customary for senior-level employees. The Company is required to pay severance under these agreements under certain conditions, as defined, in the event employment of these key executives is terminated. The Company’s commitment under these agreements is $1,250 as of March 31, 2017. The agreements are scheduled to expire by May 2017. Consulting Agreements On August 1, 2010, the Company entered into a consulting agreement related to the purchase of land with a third party. The third party acted as an agent for the Company to obtain options to purchase certain identified real property in Wisconsin, as well as obtain permits and approvals necessary to open, construct and operate a sand mining and processing facility on such real property. The third party’s ongoing compensation consists of reimbursement of certain expenses, and $1 per each acre purchased as a closing fee. For the three months ended March 31, 2017 and 2016, the Company incurred no expense reimbursements and $3 of closing costs. These costs have been capitalized in property and equipment in the accompanying consolidated balance sheets as they relate to the acquisition of land. In addition to the aforementioned fees, the third-party agreement provides for tonnage fees based upon mining operations. The payment of $0.50 per sold ton of certain grades of sand that have been mined and sold from the properties acquired under the consulting agreement continues indefinitely. The minimum annual tonnage fee is $200 per contract year, which runs from August 1 to July 31. During the three months ended March 31, 2017 and 2016, the Company incurred $117 and $45 related to tonnage fees, respectively. Bonds The Company entered into a performance bond with Jackson County, Wisconsin and Monroe County, Wisconsin for $4,400 and $900, respectively. The Company provided this performance bond to assure performance under the reclamation plan filed with each respective county. The Company entered into permit bonds amounting to $1,350 with certain towns and counties in which it operates to use designated town and county roadways. The Company provided these permit bonds to assure maintenance and restoration of the roadways. The Company has an outstanding $1,943 bond to assure performance under its agreement with a pipeline common carrier. As of March 31, 2017 and December 31, 2016, $972 and $971, respectively, of cash is being held as collateral related to the bond and is presented as restricted cash on the consolidated balance sheet.

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