Commitments and Contingencies	6 Months Ended
Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	10. Commitments and Contingencies As of June 30, 2019, the Company maintained letters of credit in the aggregate amount of $63.4 million primarily for the benefit of various insurance companies as collateral for retrospective premiums and retained losses which could become payable under the terms of the underlying insurance contracts. These letters of credit expire annually at various times during the year and are typically renewed. As of June 30, 2019, no amounts had been drawn under the letters of credit. As of June 30, 2019, the Company had commitments to purchase major equipment and make investments totaling approximately $72.8 million for its drilling, pressure pumping, directional drilling and oilfield rentals businesses. The Company’s pressure pumping business has entered into agreements to purchase minimum quantities of proppants and chemicals from certain vendors. The agreements expire in years 2019 through 2023. As of June 30, 2019, the remaining obligation under these agreements was approximately $42.2 million, of which approximately $14.9 million relates to purchases required during the remainder of 2019. In the event the required minimum quantities are not purchased during any contract year, the Company could be required to make a liquidated damages payment to the respective vendor for any shortfall. In 2017, the Company entered into a capacity reservation agreement that required a cash deposit to increase the Company’s access to finer grades of sand for its pressure pumping business. As market prices for sand have substantially decreased since 2017, the Company has purchased lower cost sand outside of this capacity reservation contract and recorded a charge of $12.7 million in the quarter ended June 30, 2019 to revalue the deposit to its expected realizable value. On January 22, 2018, an accident at a drilling site in Pittsburg County, Oklahoma resulted in the losses of life of five people, including three of the Company’s employees. Lawsuits have been filed in the District Court for Pittsburg County, Oklahoma in connection with the five individuals who lost their lives and one of the Company’s employees who was injured in the accident. The lawsuits have been consolidated for discovery purposes under Cause No. CJ-2018-60 (the “Litigation”). The Company has finalized settlement agreements with each of the plaintiffs who brought wrongful death lawsuits, and the Company has been dismissed from those lawsuits. The remaining lawsuit by the Company’s surviving employee alleges various causes of action against the Company including negligence, negligence per se, gross negligence and intentional conduct, and the plaintiff seeks an unspecified amount of damages, including punitive or exemplary damages, costs, interest, and other relief. The Company disputes the plaintiff’s allegations and intends to continue to defend itself vigorously. Based on the information the Company has available as of the date of this Report, the Company believes that it has adequate insurance to cover the Litigation. However, if this accident is not fully covered by insurance or an enforceable and recoverable indemnity from a third party, it could have a material adverse effect on the Company’s business, financial condition, cash flows and results of operations. The Company is party to various other legal proceedings arising in the normal course of its business. The Company does not believe that the outcome of these proceedings, either individually or in the aggregate, will have a material adverse effect on its financial condition, cash flows or results of operations.

Commitments and Contingencies

6 Months Ended

Jun. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

10. Commitments and Contingencies

As of June 30, 2019, the Company maintained letters of credit in the aggregate amount of $63.4 million primarily for the benefit of various insurance companies as collateral for retrospective premiums and retained losses which could become payable under the terms of the underlying insurance contracts. These letters of credit expire annually at various times during the year and are typically renewed. As of June 30, 2019, no amounts had been drawn under the letters of credit.

As of June 30, 2019, the Company had commitments to purchase major equipment and make investments totaling approximately $72.8 million for its drilling, pressure pumping, directional drilling and oilfield rentals businesses.

The Company’s pressure pumping business has entered into agreements to purchase minimum quantities of proppants and chemicals from certain vendors. The agreements expire in years 2019 through 2023. As of June 30, 2019, the remaining obligation under these agreements was approximately $42.2 million, of which approximately $14.9 million relates to purchases required during the remainder of 2019. In the event the required minimum quantities are not purchased during any contract year, the Company could be required to make a liquidated damages payment to the respective vendor for any shortfall. In 2017, the Company entered into a capacity reservation agreement that required a cash deposit to increase the Company’s access to finer grades of sand for its pressure pumping business. As market prices for sand have substantially decreased since 2017, the Company has purchased lower cost sand outside of this capacity reservation contract and recorded a charge of $12.7 million in the quarter ended June 30, 2019 to revalue the deposit to its expected realizable value.

On January 22, 2018, an accident at a drilling site in Pittsburg County, Oklahoma resulted in the losses of life of five people, including three of the Company’s employees. Lawsuits have been filed in the District Court for Pittsburg County, Oklahoma in connection with the five individuals who lost their lives and one of the Company’s employees who was injured in the accident. The lawsuits have been consolidated for discovery purposes under Cause No. CJ-2018-60 (the “Litigation”). The Company has finalized settlement agreements with each of the plaintiffs who brought wrongful death lawsuits, and the Company has been dismissed from those lawsuits. The remaining lawsuit by the Company’s surviving employee alleges various causes of action against the Company including negligence, negligence per se, gross negligence and intentional conduct, and the plaintiff seeks an unspecified amount of damages, including punitive or exemplary damages, costs, interest, and other relief. The Company disputes the plaintiff’s allegations and intends to continue to defend itself vigorously. Based on the information the Company has available as of the date of this Report, the Company believes that it has adequate insurance to cover the Litigation. However, if this accident is not fully covered by insurance or an enforceable and recoverable indemnity from a third party, it could have a material adverse effect on the Company’s business, financial condition, cash flows and results of operations.

The Company is party to various other legal proceedings arising in the normal course of its business.

The Company does not believe that the outcome of these proceedings, either individually or in the aggregate, will have a material adverse effect on its financial condition, cash flows or results of operations.